Common questions

Should you disable AFM?

Should you disable AFM?

A V8 is always a V8. So, if you want your V8 to give you the beast-like performance, then shutting down the AFM opens your door for that. The AFM keeps half of the cylinders deactivated, and it doesn’t let the vehicle reach its true potential. This is why shutting the AFM down is important to return to that mode again.

What kind of lifters do AFM engines use?

3. Lifters. AFM engines use special lifters for cylinders 1, 4, 6, and 7. They are taller and have special oil holes. Engines with AFM also use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan.

Why do I need to upgrade to a non-AFM camshaft?

You MUST upgrade to a non-AFM camshaft because the cam lobes in the four AFM cylinders are ground differently. The engine will have 25 less pounds of compression in those four cylinders which can result in a misfire code. You will need to turn off the AFM system using a computer programmer or custom tuning.

Can a DoD / AFM lifter be replaced?

Since replacing a failed DOD/AFM lifter is a more involved process that swapping out a traditional lifter, Melling has seen a large number of failures due to improper replacement methods; hence this video.

How to identify AFM components in an engine?

How to Identify AFM Engine Components. 1 1. Valley Cover. The AFM cover is called the Lifter Oil Manifold Assembly (LOMA). It’s ribbed with solenoids on the underside. It also has an 2 2. Engine Block. 3 3. Lifters. 4 3. Oil Pressure Relief Valve.

Can a trailblazer bolt up to a 5.3?

And also I got a good deal on a 5.3 from an 03 suburban with the engine harness for $500 and it only has about 150k miles on it does the v8 wireing from the trailblazer bolt up to the suburbans 5.3? you can use your trans but you have to change the bell housing.

Is the valve lifter on my Trailblazer genuine?

This is my first time replacing this piece, my 2008 trailblazer v8 5.3 was making a loud metalic noise inside the engine bay. I checked everything and found out was this vlom also my oil pressure sensor gauge was bit low. I’m not sure if this part is GM genuine.

Is there a V8 drive shaft for a trailblazer?

And theres a good deal on a v8 drive shaft for the short base trailblazer on ebay for 70$ and my brother just swapped the trans on his silverado so has his old trans laying around and figured i could use its bell housing, is there any thing else i would need so i could remove from the trailblazer im getting the swap from?

Can a trailblazer be flashed with a 5.3 OS?

You can use that Suburban PCM, flashed with a TrailBlazer EXT 5.3L OS, too. BUT, without a factory wiring harness you’ll be integrating it for a while. This isnt a simple, grab x, grab y, drop in and go. His reg TB is a 2006, wouldn’t it be best for him to use the 2006 TBSS harness? mitch kramer baby!

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Ruth Doyle