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Oil leaking on exhaust y-pipe

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Old 04-20-2010 | 04:11 PM
  #1  
Firebird Mess85's Avatar
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From: Buffalo, NY
Car: 85 Firebird & Grand Prix GXP
Engine: LG4 305 (originally 2.8L V6)
Transmission: 700R4
Axle/Gears: 10 bolt 3:43 Open Diff.
Oil leaking on exhaust y-pipe

I was under the car today trying to see how I'd line up the new exhaust if I did it myself and I notice there was a large wet spot on the underside of the y-pipe after it connects by the passenger tire. After touching it, it seems like oil and seemed to be fresh being that it was wet.

I'm confused if it is oil how that would happen? Anyone else have this happen? Rear main seal?
Old 04-20-2010 | 05:56 PM
  #2  
el_muerte's Avatar
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Joined: Nov 2005
Posts: 428
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From: Edmonton, AB
Car: '87 Z-28
Engine: LT1-topped 400
Transmission: T56
Axle/Gears: 3.42
Re: Oil leaking on exhaust y-pipe

Odds are the oil is leaking onto the pipe further up and just collected there as it is a low spot. Look for any places around the back of your engine that look oily... could be coming from just about anywhere.
Old 04-20-2010 | 06:59 PM
  #3  
game1939's Avatar
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Joined: Feb 2010
Posts: 162
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From: savannah, ga
Car: 91 chevy camaro
Engine: 383
Transmission: 700r4 built with corvette servo
Axle/Gears: posi 3:73
Re: Oil leaking on exhaust y-pipe

yeahhhh what he said
Old 04-21-2010 | 07:48 PM
  #4  
Firebird Mess85's Avatar
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Joined: Jul 2008
Posts: 362
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From: Buffalo, NY
Car: 85 Firebird & Grand Prix GXP
Engine: LG4 305 (originally 2.8L V6)
Transmission: 700R4
Axle/Gears: 10 bolt 3:43 Open Diff.
Re: Oil leaking on exhaust y-pipe

I can't see sh*t back there. There's way too much packed in there for me to look at all.
Old 04-21-2010 | 07:58 PM
  #5  
RazorN8's Avatar
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From: Holland, MI
Car: 1987 camaro
Engine: 383 AFR heads
Transmission: 700R4
Axle/Gears: Ford 9" 3.70:1
Re: Oil leaking on exhaust y-pipe

Most likely, its coming from either the valve cover gasket, the intake manifold gasket, or the oil pressure sender.
Old 04-28-2010 | 09:31 PM
  #6  
Firebird Mess85's Avatar
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Joined: Jul 2008
Posts: 362
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From: Buffalo, NY
Car: 85 Firebird & Grand Prix GXP
Engine: LG4 305 (originally 2.8L V6)
Transmission: 700R4
Axle/Gears: 10 bolt 3:43 Open Diff.
Re: Oil leaking on exhaust y-pipe

Well I replaced the oil pressure sender last month and rechecked that to make sure there was no oil and there isn't.

I have smoke coming from the passenger side and that's where on the y-pipe I saw the oil so it makes sense that it's leaking on that side. I can't see much of anything with the A.I.R. equipment there. Is there a trick to finding the leak without a lift?
Old 04-28-2010 | 09:35 PM
  #7  
84z .....'s Avatar
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Joined: Oct 2007
Posts: 149
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From: milton ont.
Car: Blue 84 z28/Cyber 2010ss/rs
Engine: Dart headed, 12:1 355- 510/530 cam
Transmission: TKO 600 Lakewood Bell
Axle/Gears: Richmond 410 Spooled
Re: Oil leaking on exhaust y-pipe

if mine dont drip one drop a week shes not runnin right
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