Please login or register.

Login with username, password and session length
Advanced search  

News:

Keep CAFCNA Alive! Become a Supporting Member Today!

Pages: [1]   Go Down

Author Topic: HOW TO REPLACE INTAKE MANIFOLD GASKET  (Read 10779 times)

0 Members and 1 Guest are viewing this topic.

brianelton

  • Full Member
  • ***
  • Offline Offline
  • Posts: 132
HOW TO REPLACE INTAKE MANIFOLD GASKET
« on: 03/03/10 08:21 AM »

I replaced my intake manifold gasket at about 80,000 miles on my 2003 Avalanche in 2007.

Here were the symptoms:
1. Ran like crap when ambient temperature was less than 45 degrees F.
2. Once warmed up would run fine.
3. Even after vehicle sat for several hours it would run fine.
4. If it sat all night in cold weather it would run like crap if the temp was 45F or colder.
5. Check engine light with a code that read LEAN BANK 1 & BANK 2.

The intake manifold gasket was shrinking in cold weather, and then of course expanding when it got hot. When it shrank it would let air in. When it warmed up it would expand and fill the void. I did the ole "spray intake cleaner all around the intake and see what happens" trick, but that didn't prove anything, so don't bother with trying that.

I did this 3 years ago, so forgive me, as I dont remember everything, but hopefully what I do remember and what pictures I took will help someone.

You'll need one specialty tool - a fuel line disconnecting tool. They sell it at your local auto parts store - its probably less than $10.
Unscrew your gas cap to relieve pressure on the tank. Pop the tool over the line, push it up in the connector to expand the splines, and pull the two lines apart.

The next tricky part is disconnecting the injectors...just be patient, study how they are connected and disconnect all the injectors.

The only other thing I remember that was minutely tricky was removal some other device attached to the intake manifold. I just looked at the pictures, and I think it might have been that solid plastic line with the green cap on it. Just look at my pictures and remove accordingly.

I am not a mechanic, I am regular ole guy with a lot of patience who loves to figure stuff out on his own and refuse to pay anyone to do anything for me. My motto is "if you can read, you can do anything." From past experience, nothing gets done right unless I do it myself, and if it isn't done right, the only person you can blame is yourself. Even if you break something trying to learn, its still cheaper than paying someone else to do a job you can do.

Anyway, thats my rant. The pics are below. Enjoy and good luck!







The design of the intake gasket makes it nice and simple! No more having to line up the holes and using silicone and all that crap to hold it in place. It just clips on!




The finished product!







   
« Last Edit: 03/04/10 07:54 AM by brianelton »
Logged
'05 2500 LT - 4x4, 4.10 gears, midnight blue w/ tan leather. Mods - roof rack, factory nav, front tint, vent visors, plugs, thermostat.

kcfan2007

  • Full Member
  • ***
  • Offline Offline
  • Posts: 40
Re: HOW TO REPLACE INTAKE MANIFOLD GASKET
« Reply #1 on: 03/04/10 03:44 AM »

wow  :o see that why i took mine in and let them do the work! But i must say you did a great job  :thumbsup: Good work does she run like a champ again?
Logged
2002 Victory Red Z71 1500 stock, leather, sunroof 20in gmc wheels

brianelton

  • Full Member
  • ***
  • Offline Offline
  • Posts: 132
Re: HOW TO REPLACE INTAKE MANIFOLD GASKET
« Reply #2 on: 03/04/10 08:37 AM »

Yeah, its been through 3 sub-freezing winters and has never missed a lick!
Logged
'05 2500 LT - 4x4, 4.10 gears, midnight blue w/ tan leather. Mods - roof rack, factory nav, front tint, vent visors, plugs, thermostat.

kcfan2007

  • Full Member
  • ***
  • Offline Offline
  • Posts: 40
Re: HOW TO REPLACE INTAKE MANIFOLD GASKET
« Reply #3 on: 03/05/10 02:46 AM »

that my friend is why we love our avys  :A:
Logged
2002 Victory Red Z71 1500 stock, leather, sunroof 20in gmc wheels

marzahld

  • CAFCNA 2018 Premium Member
  • Full Member
  • *
  • *
  • Offline Offline
  • Posts: 666
Re: HOW TO REPLACE INTAKE MANIFOLD GASKET
« Reply #4 on: 12/15/14 08:53 AM »

Have to resurrect this one as I've gotten the p171/p174 combo once again on a cold day...    Anyone do the gasket change recently?  How long of a job is it?
Logged
2013 Avalanche LT Z71 Black
Past: 2003 Avalanche Z71  Arrival Blue

MS03 2500

  • CAFCNA 2017 Premium Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 37,226
Re: HOW TO REPLACE INTAKE MANIFOLD GASKET
« Reply #5 on: 12/15/14 03:40 PM »

You probably need to plan 1 full day for this,
Logged
2003 2500
Pages: [1]   Go Up
 

Page created in 0.176 seconds with 25 queries.