Intake Manifold Gaskets

[colebaby]

2002 Tahoe 5.3L

Changed my intake manifold gaskets this weekend after pulling a 171/174 error.

The shop tried to get me on a new fuel pump (which they claimed was low pressure), but after researching online and finding intake manifold gasket issues, I made them smoke test the intake manifold. I was right.

The shop was wrong. Surprise...

Fuel pump seems fine, but I will pressure test and watch it. Cats I will do myself next weekend, just because they are rattling.

After repair idle is perfect. I also cleaned the throttle body. The truck runs like it is brand new. MAF looked clean, so I did not bother cleaning.

I will post pictures, but there is some good information online to research.

 

[bkboatnsleds]

yEP. Common problem! Nice job

 

[dwmmatt23]

Did you do it or have it done? Mine needs it bad before it gets cold again, just hesitant at tearing into it

 

[samtman18]

Changed mine a cpl yrs ago, wasnt bad, the hardest part was disconneting the wire terminals. Turns out it was a bad maf sensor from autozone that i changed out first.

 

[yukondoit]

I replaced mine in September. Like samtman18 stated, the hardest thing was disconnecting the wiring harnesses for each fuel injector. Other than that, its a pretty straight forward install.
Oh yeah one more thing, I had to clear the error codes after the install, but once I did that, it ran like a champ.

 

[bkboatnsleds]

I did a small writeup on this.. Also if you do it be sure to use the UPDATED gaskets - some places dont even realize their is an update.

---------- Post added at 07:41 PM ---------- Previous post was at 07:33 PM ----------

http://www.tahoeyukonforum.com/forum/showthread.php?t=30102&highlight=intake

 

[dwmmatt23]

I did a small writeup on this.. Also if you do it be sure to use the UPDATED gaskets - some places dont even realize their is an update.

---------- Post added at 07:41 PM ---------- Previous post was at 07:33 PM ----------

http://www.tahoeyukonforum.com/forum/showthread.php?t=30102&highlight=intake

im buying the gaskets next week and thinking about doing the knocks while im in there, any chance you did that video for your buddy?

 

[777SLK]

do you use silicone with new ones?
have mine allready installed without silicon and now thinking.. long term is high.. no CEL by the way

 

[ktmhans]

I forgot the part # but if you search my threads one of the members posted the # for the nock sensors and an updated wiring harness for them. My biggest pita doing this was just popping off the gas lines.

 

[bkboatnsleds]

I didn't do that video yet.. sorry No, I wouldn't use any Silicone anywhere.. With the right tools those gas lines should literally pop off.

---------- Post added at 09:50 PM ---------- Previous post was at 09:40 PM ----------

I wouldn't use silicone on the INTAKE gaskets.. is what i mean..