What causes a spark plug to blow out in a Ford?

A video showing spark plug thread repair using Calvan spark plug inserts being installed can be viewed on the Calvan 38900 description page. Read on for more information. Ford 4.6, 5.4 and 6.8 modular engines are prone to spark plugs being blown out of the cylinders due to the aluminum threads failing.

Can a blow out spark plug be repaired?

Summary: Ford spark plug blowout repair is covered in this article primarily for the Triton 4.6, 5.4 & 6.8 liter SOHC (Single Over Head) engines. If you have a different application, no problem, for a wider coverage of spark plug thread repairs see our Time-Sert thread repair kit section.

Which is the best spark plug repair kit?

The Time-Sert 5600 has the largest outside diameter insert available which can be used when previous repairs have made the hole so large that the Calvan 38900 cannot work. The Time Sert 5600 spark plug thread repair kit also works for more applications than the Calvan 38900 does.

What kind of spark plug do I need for Triton engine?

The Calvan 38900 DLT is for Triton engines from 1998-2003 (some models up to 2016), if working on a DOHC InTech engine, use Time-Sert 5553 or 5600. If working on a 2004 and up 3V engine with M16x1.5 spark plugs use the Calvan 39300 or the TIME-SERT 3221.

What kind of spark plugs do Dodge Dakotas use?

With our performance plugs, your engine has the spark it needs to last for years to come. Among all of the parts you need to sustain your vehicle’s performance, AutoZone’s premium selection of spark plugs for Dodge Dakota provides the perfect solution to prevent slow and cold starts.

What are the symptoms of a bad spark plug?

Symptoms of Bad or Failing Spark Plugs. 1 1. Slow acceleration. The most common cause of poor acceleration in most vehicles is a problem in the ignition system. Today’s modern engines have 2 2. Poor Fuel Economy. 3 3. Engine is Misfiring. 4 4. Engine Surging or Hesitating. 5 5. Rough Idle.

What kind of spark plugs do I need for my Ford F150?

Some 2008’s and newer use 4212H for M12x1.25 Spark Plugs. Ford blown out spark plugs is a common problem with engines in Ford F150 pick up trucks, Mustangs, Crown Victorias, Vans, Expeditions and motor homes. A video showing spark plug thread repair using Calvan spark plug inserts being installed can be viewed on the Calvan 38900 description page.

Do you need to replace spark plugs on Ford V8?

Ford has recommended a method of repair for the cylinder head that prevents the spark plug from ejecting under future use. Replacement of all spark plugs is not necessary, but an updated spark plug design can help prevent this from happening in the future. There is a technical service bulletin for the V8 engine.

Ford 4.6, 5.4 and 6.8 modular engines are prone to spark plugs being blown out of the cylinders due to the aluminum threads failing. If the spark plugs are not tight enough the spark plug vibrates until the aluminum is weakened to a point the spark plug shoots out.

How much does it cost to fix a Ford Spark Plug?

Many Ford dealers and other repair shops quote thousands of dollars to replace the cylinder heads. One mobile repair service charges $800 plus expenses to fly to you and fix your spark plug threads. We have a better idea, fix it yourself and use the difference for your own vacation!

What kind of spark plug does a Ford SOHC use?

Fits only Ford SOHC 4.6, 5.4 and 6.8 engines from around 1996 to 2000. Since there’s no counter-bore for certain engines from 2001 and up for this brand, we recommend the Time Sert kits listed above for those applications. The 38900 works for only certain SOHC engines. The original size plug M14x1.25 is used.

Why are spark plugs coming out of my Ford Triton?

Ford Triton engines are spitting out spark plugs like sunflower seeds, but the suits in Detroit act like there isn’t any problem.

What kind of car has a spark plug problem?

Other models: 1997 Ford Thunderbird, 1997-2004 Ford Mustang, 1997-2008 Ford Crown Victoria, 1997-1999 Ford F-250, 1997-2004 Ford F-350, 1997-2007 Lincoln Town Car, 1998-1999 Lincoln Navigator, 1997-2008 Mercury Grand Marquis, 2002-2006 Mercury Mountaineer Ford originally insisted the problem was due to replacement plugs being improperly torqued.

When did Ford fix the spark plug problem V10?

Re: Ford v10 spark plug problems The TSB actually covers the V8 as well as the V10, for model years 1999-2004. For vehicles under warranty, Ford replaced the heads.

Which is the best spark plug for Ford F-250?

Make sure your hardworking rig gets off to a quick and stress-free start day after day with a new, long-lasting Ford F-250 spark plug from AutoZone. Our spark plugs for Ford F250 make the most of your truck’s impressive skills because they resist build-up and withstand the rigors of high heat and pressure.

What kind of spark plug do I need for a 2004 Ford F150?

If working on a 2004 and up 3V engine with M16x1.5 spark plugs use the Calvan 39300 or the TIME-SERT 3221. More on Ford Spark Plug Blow Outs – What causes it? Ford spark plugs blowing out is a common problem with engines in Ford F150 pick up trucks, Mustangs, Crown Victorias, Vans, Expeditions and motor homes.

How big is a blow out spark plug?

The original size plug M14x1.25 is used. This kit is Made in the USA. Time Sert 5600 – Stand Alone Kit that repairs spark plug holes larger than .663″ (16.8mm). Uses one insert inside another one. The outside diameter of the largest insert is .77″ – it’s Triple Oversized.

What kind of spark plug do you need for a Ford Mustang?

Choosing the correct type of spark plugs for Ford Mustang is important, because an overheated plug has the potential to ignite the fuel before sparking. Order a Ford Mustang spark plug from AutoZone and take advantage of Same-Day Store Pickup if you need your replacement right away.

Can a V8 engine eject a spark plug?

Share it! The Ford F-150 has known issues with the V8 engine ejecting spark plugs. This will make a tapping or knocking noise, plus the engine will begin to misfire at all speeds. The check engine light will also illuminate.

What should I do if my spark plug blows out on my Ford truck?

To remove and re-torque the heads, most Ford technicians do a “cab off” or “body off” operation. On trucks the cab is unbolted from the frame; on SUV’s and vans the entire body is unbolted from the frame, the electrical wiring, AC lines, radiator hoses, heater hoses, master cylinder, etc. are disconnected.

What kind of engine has a spark plug blow out?

Ford Spark Plug Blow Out – Solved Make Model Engine 4.6 Year *Exercise Caution Ford Crown Victoria 4.6 SOHC 2V Mercury Grand Marquis 4.6 SOHC 2V Ford Mustang 4.6 SOHC 2V 1996 – 2004 Excludes Cobra Ford Thunderbird 4.6 SOHC 2V

What kind of spark plugs does a Ford truck use?

The original equipment Motorcraft brand spark plugs that were factory installed in many late model (2004 to 2008) Ford trucks with 5.4L V8 and 6.8L V10 engines, 2005 to 2007 Mustang GT 4.6 & 5.4L V8 engines, and 2008 Mustang GT models built prior to 11/30/07) can break when you attempt to remove them!

What happens if you have a bad spark plug?

Failing spark plugs can cause the car engine to misfire and thus affect its performance. Misfiring will cause increased exhaust emissions, reduced fuel economy and reduced engine power. A single misfiring spark plug can dump enough raw fuel into the exhaust; to overheat and damage the catalytic converter.

Re: Ford v10 spark plug problems The TSB actually covers the V8 as well as the V10, for model years 1999-2004. For vehicles under warranty, Ford replaced the heads.

Why are the plugs on my Ford F150 different?

They did not look too bad, except the plug #4. It appears that the Ford mechanic broke it off at the last tune up and did not extract it, or he did not attempt to change it at all. I say this because this particular plug was different than the 7 other plugs.

Which is the best color for spark plugs?

The first time I change the spark plug it had Blawn the entire and off the plug the second one it was within two weeks all brownish black and burn like fried chicken 4 people found this helpful. Coco brown is a good color but the black is not. Should be coco brown to white in color.

Can a spark plug be replaced in a Ford engine?

Replacing spark plugs in cars has been a relatively simple task since Henry Ford mastered the assembly line, that is unless you have a Ford V8 engine from 2004-2008. Those 3-valve engines hold on to their spark plugs like an anaconda choking its prey.

What happens when you dont change your spark plugs?

This continuous ignition is what keeps your car moving on the road. If spark plugs are not checked with regular services, cleaned or changed when necessary, they can cause problems to occur with the vehicle’s engine. Below are six signs for when to change your spark plugs:

Why are my spark plugs stuck in my Triton?

Spark plugs keep getting stuck in Ford’s Triton V8 engines. Owners’ blame the problem on Ford’s new plug design featuring a 2-piece shell. A TSB provides special procedures for spark plug removal on these engines.

What is the trouble code for Ford glow plug?

If it see too low a current draw, it sets a trouble codes P0671 – P0678. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period.

What happens when a spark plug is under torque?

An under-torqued spark plug will not make full contact with the cylinder head. This reduces a plug’s ability to transfer heat and will result in elevated combustion chamber temperatures. Such temperatures can cause pre-ignition and detonation and lead to engine damage.

Why does my spark plug keep backing out?

The coil keeps the plug from backing out completely. The spark plug vibrates until the aluminum threads in the cylinder head are deteriorated to a point that the spark plug ejects from the pressure of the compression from the cylinder. The spark plug ejecting typically breaks the coil on the way out.

Why would spark plug blow out of head?

A spark plug blow out occurs when the spark plug is fastened too tightly or not tight enough to the engine plug. The result is that the spark plug itself cannot properly channel the electric charge from the plug to the engine block, and the spark plug breaks down.

What causes no spark at spark plugs?

A worn set of spark plug wires may allow voltage to escape before reaching the spark plug, causing a misfire or no-spark condition and may eventually result in a fouled spark plug, requiring replacement. Coil failures may be intermittent and may only occur under high temperature conditions.

What causes a fouled plug?

Excessive oil on spark plugs is a common cause of spark plug fouling. Plugs fouled in this manner are soaked by oil forced into the combustion chamber.

What causes plugs to foul?

Fouled plugs are usually caused by excessive oil or carbon build-up. Carbon build-up would commonly be caused by poor combustion. Oil fouling is caused by excessive leaking somewhere or perhaps the oil ring on the piston gone bad.

How much does it cost to replace spark plug in Ford Expedition?

There is a technical service bulletin for the V8 engine. The average cost for a Ford Expedition Spark Plug Replacement is between $298 -$356. Learn More

Why do spark plugs keep ejecting in Ford Triton?

Trion V8 engines keep ejecting their spark plugs. It’s likely due to Ford’s decision to use aluminum cylinder heads that is subject to wearing down and not holding the plugs in place. If the vehicle is still under warranty, Ford will replace the cylinder heads if they’re damaged. But this usually happens out-of-warranty.

When did Ford start using high thread spark plugs?

Then starting in 2005 on 5.4l engines Ford started using a new design “high thread” 9/16″ coarse threaded spark plug that breaks and drops part of the ground shell into the cylinder upon removal. I may be incorrect but I take it as two seperate issues.

Why are my spark plugs blowing out on my Triton?

My interpretation of this issue is that there are two seperate issues. Any 14mm threaded modular v-8 MAY be prone to blowing the plugs out and playing “ping-pong” between the wire/coil boot and the spark plug hole.

What causes spark plugs to eject from aluminum heads?

That’s where you come in. In TSB 07-21-2 Ford acknowledges that “some 1997-2008 vehicles equipped with a 4.6L 2V, 5.4L 2V, or 6.8L 2V engine and aluminum heads may experience a spark plug port with stripped or missing threads. ↩︎ This problem has popped up in the following Ford generations.

Why are spark plugs popping out of cylinders?

Spark Plugs Popping Out Of Aluminum Heads. A couple theories exist on why spark plugs in Fords are ejecting from the their cylinders. Some blame the design of the the plugs and the use of a aluminum cylinder heads. The plugs only use 4 thread which are also made out of a weaker aluminum that is subject to wearing down.

What kind of spark plug thread repair kit do I Need?

Note that 2004 and up 3V engines use a different spark plug thread repair kit – Calvan 39300 or Time-Sert 3221. The Calvan 38900 is for SOHC engines from around 1996-2000, if working on a DOHC InTech engine, use Time-Sert 5553 or 5600.

Can a Ford 99 lose a spark plug?

I have several times that on my 99 F250, not one issue yet. occassion. It is in small enough numbers, but if you are one of the owners, you won’t be happy. (Ford won’t cover the repair.) Your though. My 99 has 90+ K miles on it and it hasn’t lost a plug yet. I’m then I’ll be wondering for an unknown time beyond that. (I’m pretty

Why is there a gap in my spark plug?

Issues like spark plug gapping, leaking valve covers or moisture intrusion. A proper spark plug gap is crucial to an ignition system and the health of an ignition coil. A worn or excessive gap will cause an ignition coil to work overtime, using more voltage to bridge the gap and create spark inside of the cylinder.

What causes oil to leak from spark plugs?

Therefore, when this component is faulty, it paves a way for oil to pass through the valves and leak into the spark plugs. A clear sign that points to leaking O-ring seals as the reason for oil on spark plug threads is engine misfiring.

What causes spark plug wire to misfire on Ford Super Duty?

Ford Super Duty 7.3L V8 Spark Plug Wire Update About a week ago we published a story about the engine misfire on our 2020 Ford F-250 Super Duty with a 7.3L gas V8 engine. The cause of the problem is a spark plug wiring harness – the wire that connect the ignition coil and the spark plug.

What should I do if my spark plugs blow out on my Ford F150?

Ford 5.4 L in 2008 F150 spark plugs break off in head a known problem to Ford and not acknowledged for recall fix. Tune up on this engine is at least $800 at Ford dealer and maybe more.

How big is the spark plug on a Ford F-150?

It is rated at 500 degrees I tighten plug to 21 foot pounds with Loctite on it.Truck has 114,000 miles on it.Ilso changed all other plugs and tightened them to 21 foot lbs too. No Loctite on them though. In April 2016 I had a spark plug blow out on my 2008 F150 Ford.

What causes oil to leak from the spark plug?

If the gasket is not well sealed around the spark plug, it is likely to allow oil to leak into that area, which will pool and eventually cause problems for the engine as outlined above.

How can a tow truck blow a spark plug?

Tow truck driver pulled out a totally disconnected spark plug. The truck seemed to run well after replacing the spark plug. At garage, mechanic said all spark plugs were off brand (not Mororcraft); the head ruined and must be replaced. Cross threaded and oil on cylinder…how can truck be driven for 11,000 miles and blow spark plug?

Do you need a deep socket for spark plugs?

But if your spark plug is deep down into the engine head of your car’s engine then you are going to need a deep socket and possibly an extension. Use the internet to find out what is the appropriate size spark plug for your specific engine model and year.

How old is the spark plug thread on a Ford?

Years 01′ to 05′ 3.9 liter engines used 3/4 reach WASHER SEAT spark plugs. ford professional spark plug thread repair ford spark plug thread repair, ford spark plug threads stripped.

What happens when spark plug ejects from cylinder head?

Problem Description. The threads on the cylinder head are too short and soft, allowing pressure from combustion to overwhelm and destroy the threads. When the spark plug ejects, the cylinder head becomes damaged, necessitating repair of the spark plug port threads, or replacement of the cylinder head and cylinder head gasket.

When did the spark plug blow out in my Triton?

Other Models and Model Years Affected: Other years of the vehicles listed above that are affected by spark plug blowout in the Ford Triton engine: Ford Expedition: 1997, 1998, 2004, 2005, 2006, 2007, 2008.

Why are spark plugs ejecting from the cylinders?

A couple theories exist on why spark plugs in Fords are ejecting from the their cylinders. Some blame the design of the the plugs and the use of a aluminum cylinder heads. The plugs only use 4 thread which are also made out of a weaker aluminum that is subject to wearing down.

Why are spark plugs ejecting from my Triton engine?

We believe this defect affects the following 2-valve engines: Triton 4.6L V8, 5.4L V8, 6.8L V10 & possibly others. A couple theories exist on why spark plugs in Fords are ejecting from the their cylinders. Some blame the design of the the plugs and the use of a aluminum cylinder heads.

Where does the Spark Go in the ignition coil?

Once the ignition coil gets this switching signal, it starts to spark away and as you’re already aware, this spark gets delivered to the center of the distributor cap by a high tension wire. From this point, the distributor rotor distributes the spark to the cylinders across the spark plug wires.

What causes spark plugs to get wet and foul out?

According to AA1Car.com, this occurs when the spark plug fails to fire, or fouls out. This can be caused by a number of variables, such as engine flooding, or excessive moisture build up. Failed vehicle starting attempts eventually lead to wet spark plugs, according to E3 Spark Plugs.

What to do when spark plugs come out in Ford Triton?

Ford suggests installing Lock-N-Stitch thread inserts in the heads. Essentially what this does is create new threads to prevent the spark plugs from popping back out. But because of the weak aluminum used, owners report that this fix is usually only temporary.

How can I repair stripped out spark plugs?

Here’s what I use to repair stripped out spark plug threads on these engines. Alot cheaper than removing the head! Any decent shop should own one of these tools…A little grease applied to the tap will catch and hold any aluminum chips and keep them out of the engine. Replace the entire engine?? Find a new repair shop. These guys are thieves.

How to fix engine that’s leaking oil on spark plugs?

How to repair an engine that’s leaking oil on the spark plugs by replacing the spark plug tubes and valve cover gasket. Spark plug tubes and valve cover gasket location, inspection, removal and replacement. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2.

How long does it take to change spark plugs on Ford Expedition?

You should be able to apply the spark plug removal procedure shown in this video to the 2009-2014 Ford Expedition model years with the 5.4 Triton engine. This can be done with simple hand tools, and should only take about 2.5 hours to complete. It is a fairly easy process due to the newer Ford Motorcraft SP-509 spark plug design.

How do you rethread a spark plug hole?

Thread the tap into what remains of the existing spark plug threads, cutting new, oversize threads as you turn the tap increasingly tighter. Back the tap out after you have threaded to a depth equivalent to the threads on your spark plug. Install the threaded insert onto the installation mandrel.

How to fix a stripped spark plug hole in your car?

Spark plug hole stripped. How to fix a stripped spark plug hole in your car, DIY with Scotty Kilmer. How to rethread a spark plug hole. How to fix an engine with a blown spark plug hole and ruined threads on the head. DIY car repair with Scotty Kilmer, an auto mechanic for the last 47 years. 1. Fix a Thred: http://amzn.to/2nsM9aG 2.

What to do when spark plugs get stuck in engine?

The TSB provides a special procedure for spark plug removal on these engines. For situations where the spark plug has broken in the head, Ford distributes multiple special tools for removing the seized portion of the plug. This repair is covered for vehicles under warranty — which is doubtful. Some tips from the TSB [1:1]:

How big is the hole in a spark plug?

Calvan 38900 – Over sized kit that repairs spark plug holes up to approximately .678″ (17.24mm) which is the reamer O.D. The outside diameter of the insert is .73″.

How do you fix a spark plug hole?

Coat the supplied oversized threaded tap with bearing grease to catch the shavings when you thread it into the cylinder head. Thread the tap into what remains of the existing spark plug threads, cutting new, oversize threads as you turn the tap increasingly tighter.

What should I do if my spark plug blew out?

Q: Yesterday I was driving home and a spark plug blew right out of the cylinder head. The car was towed to the shop where I’d had a tuneup the day before — which included changing the spark plugs. The mechanic said he could repair the threads, but my uncle says the cylinder head is ruined and the mechanic should replace it at his expense.

What to do if spark plug threads come out?

There are several types of repair inserts, but we prefer Helicoils. I’d give your mechanic a shot at fixing the threads before I held his feet to the fire. When a spark plug has had a chance to marry a cylinder head for 100,000 miles, it’s not uncommon for the aluminum threads to come out of the head with the plug.

How do you install a spark plug into a mandrel?

Install the threaded insert onto the installation mandrel. Use the mandrel to screw the threaded insert into the new oversize threads. Install the spark plug into the threaded insert and tighten.

What are the issues with the Ford Expedition?

The Ford Expedition has known issues with the V8 engine ejecting spark plugs. This will make a tapping or knocking noise, plus the engine will begin to misfire at all speeds. The check engine light will also illuminate.

What happens when the spark plug ejects in a Ford?

When the spark plug ejects, the cylinder head becomes damaged, necessitating repair of the spark plug port threads, or replacement of the cylinder head and cylinder head gasket. Ford has recommended a method of repair for the cylinder head that prevents the spark plug from ejecting under future use.

What kind of engine has a spark plug blowout?

Fords Most Likely to Experience Spark Plug Blowout ∞ 1 1999 Ford Expedition 2 2000 Ford Expedition 3 2001 Ford Expedition 4 2002 Ford Expedition 5 2003 Ford Expedition 6 2001 Ford F-150 7 2002 Ford F-150 8 2003 Ford F-150 9 2004 Ford F-150

Where does spark plug 4 blow out on Triton?

Spark plug #4 on passenger side blew out of its cylinder. Happens a lot on 5.4 tritons. only need this spark plug replaced. Hi there. Unfortunately, this is a service that requires advanced machining tools; which our mobile mechanics don’t typically have access to on site. As such, it’s not a service we provide at YourMechanic.com.

Can a spark plug be put back in an engine?

Hello – you are correct that this is a chronic problem with this engine (Ford TSB 07–21–2). However, it is not simply a matter of putting another spark plug back in the cylinder head. In virtually all cases, the cylinder head threads are stripped, and a new spark plug will not torque properly, or remain in the head once the engine fires.

What causes spark plug threads to wear out?

The heads only have about 4 threads for the spark plug hole. The head is made out of aluminum and will wear out if the spark plug is not tightened to exact specification the first time a plug was in the hole. When the plug moves it will wear the threads until the plug flies out.

Is there a problem with the spark plugs in a Ford F-150?

Problem Description. The Ford F-150 has known issues with the V8 engine ejecting spark plugs. This will make a tapping or knocking noise, plus the engine will begin to misfire at all speeds. The check engine light will also illuminate.

What happens when you have bad spark plugs on a F150?

The less cylinders that your engine has, the more that one cylinder not firing properly will have. If you have one or more bad spark plugs, it’ll cause the acceleration of the F150 to be weaker. The less efficient the combustion of your engine, the more fuel is going to be wasted. This leads to a decrease in fuel economy.

When do spark plugs break in a Ford?

Ford and owners settle class-action lawsuit that alleges Ford spark plugs break off in the engines. May 17, 2016 — Ford and Lincoln owners who experienced spark plugs breaking when trying to change the plugs have claim benefit deadlines approaching after Ford agreed to settle a class-action lawsuit.

What causes a spark plug to blow out of the cylinder?

6, 5.4 and 6.8 modular engines are prone to spark plugs being blown out of the cylinders due to the aluminum threads failing. If the spark plugs are not tight enough the spark plug vibrates until the aluminum is weakened to a point the spark plug shoots out.

What should I do if my spark plug blow out?

Most common engines that have the problem are Ford 4.6, 5.4 & 6.8 liter engines, although any engine can have this issue. If unsure of which spark plug thread repair kit is right for your engine, we can assist. Just give Dennis a call (he’s a Master Tech shown in the video below demonstrating the Time Sert 5600 kit).

What happens when you eject spark plug in Ford F-150?

The Ford F-150 has known issues with the V8 engine ejecting spark plugs. This will make a tapping or knocking noise, plus the engine will begin to misfire at all speeds. The check engine light will also illuminate.

How to troubleshoot a blown head gasket in a Ford 4.6L?

Pop the hood on your Ford 4.6L, 5.4L van (or car, pick up, SUV) and once open, pull out the engine’s oil dipstick. Now, check what the color of the oil is and how thick it is.

Is it common to blow out spark plugs on Ford V10?

Ford-charged head replacement. and beyond?). I’ve heard there is more metal/thread depth built into the newer heads. It aplies to all years except 05’s and it is not very common. I just passed 65k as well and still strong as an ox. My ’99 V10 has 97K on it without problems. It is not a ‘given’ that you will have a problem.

Is there a problem with my 99 Ford V10?

My ’99 V10 has 97K on it without problems. It is not a ‘given’ that you will have a problem. If it ever did blow, then I would take it to a good

What was the name of the Ford Spark Plug case?

FORD MOTOR CO. SPARK PLUG AND THREE VALVE ENGINE PRODUCTS LIABILITY LITIGATION Case No. Case No. 1:12-md-2316.

Why did my car plug blow out on the passenger side?

It’s the rear plug, on the passenger side and nearly impossible to get to. It blew out the plug and destroyed the coil. The garage mechanics said it must be something from below, piston,valve that pushed it out. But from what I’ve learned, it’s a faulty design.

How to repair a blown spark plug on a 2005 Ford F150?

Please try again later. This was used of 2005 Ford F150 with 4.6L engine. It worked perfectly for the blown out spark plug #3. Make sure piston is at bottom dead center. To determine this, I used a big plastic plug that kinda stuck in the spark plug tube and had a tiny bit of a seal.

What happens if you have a spark plug leak?

It’s import to fix this leak as soon as you discover it. Oil in a spark plug can do extensive damage to different areas of the motor, such as warping or breaking the valves and pistons or destroying the head gasket, which could lead to bigger problems.

What to do when your spark plug Wells fill with oil?

Although the leak can sometimes be fixed by tightening the valve cover bolts, more often than not the valve cover gasket and well seals will need to be replaced. If this leak is left untreated, the spark plug boot could swell, which in turn will lead to a misfire in the engine. It’s import to fix this leak as soon as you discover it.

What causes a spark plug to blow out in a Ford?