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exhaust manifold loose/warped gasket

Messages
43
Likes
10
Location
Thorold
#1
Installed my cobb cat back exhaust last week and was hearing a screeching noise under heavy acceleration checked everything for leaks and had none. I removed my manifold heat shield and found the bottom of the cylinder head black and the manifold stuts/nuts loose (hand tight) so I tightened them and it was still making the noise so I removed the manifold and found the gasket is warped and leaking. would loose bolts cause this? I ordered new studs nuts and gaskets was hoping that would fix it. car has only 20,000km and I have never had the manifold off before so it must have come from ford loose and slowly got worse with vibrations till it leaked and I noticed, just strange how I didn't hear it until I installed the cat back.

WIN_20160621_11_30_10_Pro.jpg WIN_20160621_11_30_00_Pro.jpg
 


Perfblue15

1000 Post Club
Messages
1,375
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341
Location
Canyon country
#3
Installed my cobb cat back exhaust last week and was hearing a screeching noise under heavy acceleration checked everything for leaks and had none. I removed my manifold heat shield and found the bottom of the cylinder head black and the manifold stuts/nuts loose (hand tight) so I tightened them and it was still making the noise so I removed the manifold and found the gasket is warped and leaking. would loose bolts cause this? I ordered new studs nuts and gaskets was hoping that would fix it. car has only 20,000km and I have never had the manifold off before so it must have come from ford loose and slowly got worse with vibrations till it leaked and I noticed, just strange how I didn't hear it until I installed the cat back.

View attachment 10486 View attachment 10487
When I installed my Deadhook turbo kit I found my manifold I'm the same condition. Some of the bolts were hand tight and a few were mere threads away from falling off. Glad to hear I am not the only one to have this issue.

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OP
C
Messages
43
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10
Location
Thorold
Thread Starter #4
Thats a 1st. Did you happen to buy the car used?
I bought the car brand new last July, I fixed the problem new gasket and studs no leak anymore car feels much better I wonder how many other manifolds are the same way since perfblue15 found his that way too.
 


me32

1000 Post Club
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fairfield
#5
I bought the car brand new last July, I fixed the problem new gasket and studs no leak anymore car feels much better I wonder how many other manifolds are the same way since perfblue15 found his that way too.
Thats a good question. Seems like it wasnt tq properly at the factory
 


Messages
5
Likes
0
Location
Philadelphia
#6
Running Cobb stg3 parts with MRX turbo. My gasket seems to be leaking as I now have a leak from the manifold. Could this be from boost pressure?
 




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