Intake manifold issues
Thread Starter
6th Gear
Joined: Jul 2011
Posts: 6
Likes: 0
From: State College PA
Intake manifold issues
I have about 70K miles on my '88 convertible, and the intake manifold cracked causing the engine to run like crap. I figured, things happen, no big deal.
I called the original owner, who is a friend, and he told me at about 35K miles he was experiencing a misfire and finally located the problem, a cracked intake manifold.
That just seems odd. I can't imagine they go bad that often, let alone, twice in a single car. Does anybody know of a known issue in C4 Vettes that might explain this? Or is this probably just a coincidence?
Thanks for the help!
I called the original owner, who is a friend, and he told me at about 35K miles he was experiencing a misfire and finally located the problem, a cracked intake manifold.
That just seems odd. I can't imagine they go bad that often, let alone, twice in a single car. Does anybody know of a known issue in C4 Vettes that might explain this? Or is this probably just a coincidence?
Thanks for the help!
Safety Car
Joined: Aug 2009
Posts: 3,745
Likes: 275
From: Melbourne, Victoria, Australia
I have no idea how one could crack without driving a truck over a vette?
It is aluminum cast so should bend before cracking.
Is it visible ? can you post a picture?
Log onto www.photobucket.com
Sign up create a profile and you can upload the photos, and use the image code when you post on this forum
I have had my vette for 15+ years and it still has the original inlet manifold,runners.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
somethings out of alignment.It would almost have to be a head because thats the only place the intake touches. The rest has RTV between it..Maybe Decking could be off also causing this , Im not sure... WW
Last edited by WW7; Nov 28, 2011 at 07:53 AM.
Thread Starter
6th Gear
Joined: Jul 2011
Posts: 6
Likes: 0
From: State College PA
I can't get pictures until spring, once I figured out the problem, I just put the car in storage for the winter.
I have never seen a cracked intake manifold before now either, that is what makes this so weird, to have 2 get cracked. Odd, I was hoping there would be something obvious that I could get fixed/adjusted when I get the new manifold put on. I guess I'll just have to find a mechanic that is familiar with the C4 and make sure he does it right.
I have never seen a cracked intake manifold before now either, that is what makes this so weird, to have 2 get cracked. Odd, I was hoping there would be something obvious that I could get fixed/adjusted when I get the new manifold put on. I guess I'll just have to find a mechanic that is familiar with the C4 and make sure he does it right.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Someone installed the wrong manifold for the heads or vice versa. Go here to read about the differences: http://www.hotrodlane.cc/PDFFILES/TPIStory.pdf
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