When did the GM Vortec cylinder heads come out?

The Vortec line of cylinder heads was introduced by GM in 1988 as a V6 with a 4.3-liter displacement.

What’s the difference between a Vortec and Vortex head?

Experienced mechanics are all too familiar with the lay out of a Vortex head as all the attachment bolts point straight up when the head is bolted to the engine. The Vortec head is without a doubt engineered towards producing more power, torque and engine response while improving overall fuel economy.

What kind of heads do you need for a 4.3L V6?

Stock 1987-1995 4.3L V6 heads have similar flow rates from idle to 4,000 RPM. However, a 4.3L V6 engine that is designed for racing will not be swirl port design with those those ski-jumps in the intake ports. Three years ago, I installed a pair of 1995 #10238181 L35-W heads on the engine my 1991 S10 Blazer LB4-Z engine.

What are the casting numbers on a Vortec head?

The Vortec head is available in two casting numbers (10239906 and 12558062) that offer identical performance virtues. You can also check the casting mark on the end of the head and check for three triangular saw-tooth casting marks that indicate Vortec potency.

What was the biggest change in GM’s Vortec heads?

The biggest change GM made in the new design was revising the water jacket so the new Vortec heads could be used on conventionally cooled small-blocks. The idea of using the 1996 LT1 cast iron head as a starting point for a new performance stock head came from the fact that it was the highest flowing LT head used by GM.

What’s the difference between vortec heads and SBC heads?

•Port flow was designed to be high in the .300-inch to .500-inch valve lift area to make power with relatively low-lift truck camshafts, whereas the old school Gen I heads liked higher-lift camshafts to make their power. Vortec heads have the “sawtooth” pattern casting mark on the end of the heads.

Which is better a Vortec head or an aluminum head?

The 1996 Caprice/Impala heads outflowed the Corvette Aluminum LT1 heads by as much as 20 cfm on the intake side. The cast iron Vortec head was in development six months longer than the aluminum head. During that time, GM engineers tweaked the intake and exhaust ports for additional flow.

What’s the difference between Vortec and double hump cast heads?

•Stock out-of-the-box Vortec heads have approx. 480 horsepower potential naturally-aspirated. Out of the box double hump cast heads produced from 25 to 40 horsepower less, depending on valve size. •Maximum valve lift on Vortec cylinder heads is .460-inch to .480-inch.

What is the difference between 5.7 vortec heads and regular 350 heads?

5.7 Vortec Heads and Regular 350 Heads. The intake port of the Vortec head is different and measures 160cc with a modified port that increases the flow velocity.

What kind of head does a Chevy GTZ have?

346 0 2.125/1.625 Gen III LS1 “GTZ” aluminum 38cc angle plug 12480011 SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034 2.02/1.60

The Vortec line of cylinder heads was introduced by GM in 1988 as a V6 with a 4.3-liter displacement.

5.7 Vortec Heads and Regular 350 Heads. The intake port of the Vortec head is different and measures 160cc with a modified port that increases the flow velocity.

346 0 2.125/1.625 Gen III LS1 “GTZ” aluminum 38cc angle plug 12480011 SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034 2.02/1.60

What is the OEM part for GM headlight switch?

Standard Motor Products Part # DS876T. OEM (Original Engine Management) Part # HLS31. If this headlight switch tutorial does not apply to your GM pickup or SUV, there’s one more headlight switch tutorial for 1994 and older GM pickups that you can find here: How To Test The Headlight Switch (GM 1990-1994). Symptoms Of A Bad Headlamp Switch.

What are the casting marks on a Vortec head?

You can also check the casting mark on the end of the head and check for three triangular saw-tooth casting marks that indicate Vortec potency. The intake valve seat of the Vortec head has a three-angle grind straight from the factory and the combustion chamber design is a radical departure from former GM heads utilized in the market.

How to identify a small block Chevy cylinder head?

Chevy cylinder head Identification – Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. Small Block Casting numbers Casting Number CID Years Valves Comments 10065202 350 82-86 1.94/1.50 76cc 10065203 350 82-86

What kind of head does a Chevy Vavle have?

10185040 Splayed vavle head 45 CC angle plug 10205245 350 93 2.00/1.55 Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports 10207643 350 94-97 2.00/1.55 Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports 10208890

Gen III LS1 “GTZ” aluminum 38cc angle plug 12480011 SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034

What kind of head does a Chevy fast burn have?

2.00/1.55 GM Fast burn 62 CC 210 CC intake runner angle plug Vortec 12480005 346 0 2.125/1.625 Gen III LS1 “GTZ” aluminum 38cc angle plug 12480011 SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads.

Is the 350 head the same as the 5.7 Vortec?

Vortec heads instantly added 55 or more horsepower to a regular 350 head with the same displacement. Automotive enthusiasts are quick to note that the 350 and the 5.7 Vortec are essentially the same engine with the same displacement. The 350 designation is the cubic inch measurement that also translates to 5.7 liters.

Why is my GMC Truck cylinder head cracking?

Some vehicles may experience a gradual coolant loss over time. A very low percentage of cylinder head (s) manufactured with an embossed Castech logo may develop a porosity crack in a very specific area. Inspect the cylinder head assembly to determine if the casting was manufactured by Castech.

How many horsepower does a Vortec head add?

This technology created a vortex or pressurized swirl of fuel and air mixture inside the combustion chamber that enables the engine to produce more power while still gaining a marginal amount of fuel efficiency. Vortec heads instantly added 55 or more horsepower to a regular 350 head with the same displacement.

How are new Vortec 350 cylinder heads assembled?

Heads are assembled with NEW 2.02 Stainless Steel ONE piece Intake valves Heads are assembled with NEW 1.60 Stainless Steel ONE piece Exhaust valves Heads are assembled with .600 valve springs with hardened valve keepers Heads are assembled with NEW HI TEMP VITION POSITIVE LOCKING VALVE SEALS PLEASE INCLUDE CAM SPECS OR CARD WHEN ORDERING.

What are the intake valves on a Chevy Vortec 350?

NEW PAIR of aftermarket GM CHEVY VORTEC 350 V8 5.7 OHV CAST IRON PERFORMANCE CYLINDER HEADS 2.02 STAINLESS VALVES 906 062 1996 – 2000 Heads are assembled with NEW 2.02 Stainless Steel ONE piece Intake valves

What causes damage to a Chevy Vortec 350?

1) Damage caused by improper installation, accidental over heating, abuse or neglect. 2) Loss of time, use of vehicle, phone calls, inconvenience or consequential charges. 3) Fluids, tow charges, rentals or diagnosis.