Intake Manifold

[de0147]

Just found out that my Tahoe, 98, with 77.0 miles has a intake manifold leak. I have been smelling antifreeze. My neighbor who has a 98 Tahoe also, had a cracked manifold in the past month, he has 98.0 miles on his. Is this a problem with all Tahoes? and if so, why isn't Chevy taking care of it. Who do you report it to? He phoned GM and got the brush off.

[99ssconv]

did you buy the extended warranty, thats what they are for. all gaskets fail over time, however, gm just came out with a new design lower intake gasket for your truck, i installed one yesterday and believe it will help the concern.

[Ketch]

Originally Posted by 99ssconv

gm just came out with a new design lower intake gasket for your truck, i installed one yesterday and believe it will help the concern.

I just put in a new FEL gasket to fix manifold leak on 99 Suburban 5.7L R engine - probably same as the Tahoe's. How is the "new design" gasket different from old? Perhaps if you posted a picture of the new gasket, all of us who have fought this battle could appreciate if this is worth pursuing.

[99ssconv]

the new design gasket has metal around the bolt holes to prevent overtightening the gasket and causing premature failure.

[de0147]

Are we saying that extended warranties should be purchase to compensate for poor design or workmanship. I don't agree. I also don't agree that all gaskets fail over time, unless you are talking about a lot of time, not 77.0 miles. If it isn't a design problem then why the new gasket?

[99ssconv]

if a gasket could be designed that would never fail then we wouldn't be able to afford the initial cost of the vehicle, the new gasket is a improvement over the original and will also fail over time.

[Rick246]

I just found out today that my 99 Tahoe has a leak at the intake manifold, I was smelling antifreeze. My mechanic told me that Chevy uses plastic gaskets with a rubber inlay. He believes this is a design flaw. Let me know if there is a better gasket to get. My Tahoe only has 69,000 miles on it.

[ronkh]

I have had 5 gaskets. Yes, it's a known problem. More like alum. mainfold, and different block. Intake manifold gasket should NOT fail, unless it is defective, or put in incorrectly. So it is a design flaw. and chevy should eat it. but they will deny any problems.

[sa200]

aluminum expands and contracts a lot more than cast iron..the old motors with cast iron intakes didnt have gasket probs like the new motors...

[bumsinflt]

Have 99 Tahoe 70.0 miles - same problem - have a lifter also that clicks when cold - wonder if the two are connected?