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exhaust manifold leaking???

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Old Jun 2, 2004 | 08:28 PM
  #1  
FirebirdNYC's Avatar
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
exhaust manifold leaking???

okay so i got this nasty clicking , i started getting it about 3 weeks ago, and it just gets worst its driving me nuts , its coming from the passenger side of the engine, it sounds like its coming from the exhaust manifold, but wouldt my exhaust manifold looking a little black from the leaking?? i know i found a leak in my muffler, that was taken care of, it just seems to get worst, anything i can be looking for if there is a leak?, my car sounds like a diesel engine
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Old Jun 2, 2004 | 09:01 PM
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From: Summerville, SC, USA
sounds like you blew a gasket..just replace it.
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Old Jun 2, 2004 | 09:52 PM
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
yeh i was thinking that too, but wouldnt there be noticable signs of leaking? i know i had some nasty black stuff on my muffler, i was thinking id be able to see it on my exhaust manifolds to if it were leaking , i guess i might as well replace it just to be sure
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Old Jun 2, 2004 | 09:55 PM
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
I don't know if im 100% right, but im pretty sure I read on here that the stock manifolds do not use gaskets. I am in the middle of a header install right now. My car has been untouched by the previous owner and my back two manifold bolts on the driver side were loose. I unscrewed them with my finger! But I did not have a exhaust leak.


Id try getting a wrench and checking your bolts.
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Old Jun 2, 2004 | 10:33 PM
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From: In a mint Third Gen!
Car: Red 87 IROC-Z28 T-Top
Engine: 5.7 Tuned Port Injection
Transmission: 700R4 Auto
Axle/Gears: BW 9-Bolt 3.27
Try tightening it since it's probably a leak.
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Old Jun 3, 2004 | 03:20 PM
  #6  
FirebirdNYC's Avatar
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
well today i had the chance to check the bolts on the manifold, they were pretty loose, some even almost off !, i got the driver side tightened up real good, the only problem is the leak is coming from the passenger side, i had a hard time getting to the bolts, so i only tightened about two of them , i think im going to have to lift the car up to get to the ones on the bottom, its not as loud now, but not satisfied with it , hope when i tighten the bottom ones it shuts up!
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Old Jun 7, 2004 | 05:42 PM
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From: WPB, FL
Car: '89 Trans Am GTA
Engine: TPI350
Transmission: 700r4
Axle/Gears: BW 3.27s
Originally posted by IROCThe5.7L
I don't know if im 100% right, but im pretty sure I read on here that the stock manifolds do not use gaskets. I am in the middle of a header install right now.
I pulled mine off a few days ago, and there were no gaskets. A couple of bolts were a little loose, but no leaks. Are you using gaskets to install your new headers, and are you using any sealant or any type of grease on either gasket surfaces? I'm not sure if I need to or not. Thanks
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Old Jun 7, 2004 | 06:36 PM
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IROCThe5.7L's Avatar
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by luke4907
I pulled mine off a few days ago, and there were no gaskets. A couple of bolts were a little loose, but no leaks. Are you using gaskets to install your new headers, and are you using any sealant or any type of grease on either gasket surfaces? I'm not sure if I need to or not. Thanks


My manifolds had no gaskets either. I used the gaskets and bolts that came with my Hooker 2055's and no leaks I did not use grease or sealant.
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Old Jun 7, 2004 | 06:45 PM
  #9  
FirebirdNYC's Avatar
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
ive yet to lift my ride to tighten the bolts up, my buddy is lending me his jack and jack supports so hopefully i can get to them while being under the car ,
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Old Jun 8, 2004 | 07:31 PM
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From: WPB, FL
Car: '89 Trans Am GTA
Engine: TPI350
Transmission: 700r4
Axle/Gears: BW 3.27s
its a reach, but much easier under the car. If you hate using jacks and stands like me, I'd get some ramps. it's nice for getting under there to do engine/tranny stuff. btw haynes says tighten the middle bolts then do the outer bolts... good luck
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Old Jun 8, 2004 | 07:38 PM
  #11  
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
well today i had my mechanic check it out for me, it seems that i am missing 2 bolts, im going to the dealer tomorrow he saids its pretty hard to get , i hope this solves the problem
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Old Jun 10, 2004 | 05:36 PM
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From: Summerville, SC, USA
thats crazy how some of you didn't have gaskets...i guess who ever had my car before put the gaskets on. when i blew a manifold gasket it was near the bottom so i couldn't see it. i put a new one on and it fixed it
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Old Jun 10, 2004 | 05:38 PM
  #13  
FirebirdNYC's Avatar
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From: Ozone Park, NYC
Car: 1990 firebird
Engine: 3.1 v6
Transmission: 700R4
yeh i told my mechanic that i thought my car didnt come with a gasket and he said thats imposible , all cars have them even race cars
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