Intake Manifold Gasket Fel-Pro MS98016T Intake Manifold Gasket
Intake Manifold Gasket Fel-Pro MS98016T Intake Manifold Gasket
Very common problem with the GM truck engines,
including my 2001 GMC Yukon XL SLT with 5.3l engine. Symptoms include
very high idle on start, then low, loopy idle, check engine light
(service engine soon light), hesitation on take off, etc. Codes might
include MAF (manifold air flow) sensor, lean conditions and more.
Normally one is supposed to chase the "hard" codes first before any other troubleshooting or work, but in this case, literally millions of GM's were put on the street with intake manifold gaskets that deteriorate over time. Fix this first! You will most likely see that is solves all other problems, like it did in my case. This is so common, one could buy a truck for cheap, spend a few hours fixing the intake manifold gaskets, and make a nice tidy profit reselling the vehicle.
Total time for me to remove, clean up, and replace the intake gaskets was about 3 hours. Did it during the AFC championship game, easy job. Was able to use my Makita 1/4" impact driver for all but the back intake bolts, makes for a very easy dis-assembly.. Be sure to clean surfaces with a razor blade and some mineral spirits before re-asssembly. Also, have shop vac handy and use it liberally during the repair to ensure that no material goes down the intake ports of the heads.
While you are under the intake manifold, don't forget to check the condition of the knock sensors and wiring and repair or replace if necessary. Earlier GM engines are prone to damage in this area because of water infiltration. Later engines, like mine, have foam dams in place front and rear that minimize water intrusion, mine were in great shape.
Normally one is supposed to chase the "hard" codes first before any other troubleshooting or work, but in this case, literally millions of GM's were put on the street with intake manifold gaskets that deteriorate over time. Fix this first! You will most likely see that is solves all other problems, like it did in my case. This is so common, one could buy a truck for cheap, spend a few hours fixing the intake manifold gaskets, and make a nice tidy profit reselling the vehicle.
Total time for me to remove, clean up, and replace the intake gaskets was about 3 hours. Did it during the AFC championship game, easy job. Was able to use my Makita 1/4" impact driver for all but the back intake bolts, makes for a very easy dis-assembly.. Be sure to clean surfaces with a razor blade and some mineral spirits before re-asssembly. Also, have shop vac handy and use it liberally during the repair to ensure that no material goes down the intake ports of the heads.
While you are under the intake manifold, don't forget to check the condition of the knock sensors and wiring and repair or replace if necessary. Earlier GM engines are prone to damage in this area because of water infiltration. Later engines, like mine, have foam dams in place front and rear that minimize water intrusion, mine were in great shape.
