I think I have a head leak, I think I'm gonna be broke |
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I think I have a head leak, I think I'm gonna be broke |
Allan |
Nov 26 2005, 07:08 PM
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#1
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
My car has the faint dreadful puffing sound coming from the right side of the motor. I stuck my hand up around the exhaust and could feel air blowing in a steady stream. It wasn't hot air or coming out in a quick puff, puff, puff like I would think escaping exhaust gasses would be.
When there is a load on the motor when accelerating the exhaust note becomes very deep and loud. Like the sound of a Harley with open pipes. Once up to speed it gets really quite. Am I doomed??? |
J P Stein |
Nov 26 2005, 07:21 PM
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#2
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
I had this happen at an AX once. The plug for the air injection
port fell out. I laid under the car while the engine was running to find it.....Not too bright but effective (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) |
Porsche Rescue |
Nov 26 2005, 07:27 PM
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#3
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Saving and Enjoying Old Porsches Group: Members Posts: 2,978 Joined: 31-December 02 From: Bend, Oregon Member No.: 64 Region Association: None |
Is it a 2.7? If so, JP may have diagnosed it. Could also be an ordinary exhuast leak at the head. If you have headers you should be able to look up there and see black where the leak is. A lot harder to see if you have heat exchangers.
Noise under load, quieter on slack throttle, sounds like exhaust, not head. |
Allan |
Nov 26 2005, 07:28 PM
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#4
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
What's the best way to validate my worst fear???
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brp914 |
Nov 26 2005, 07:37 PM
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#5
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Unregistered |
hows about doing a compression check. Also, might want to take off the valve covers and make sure those head studs are snug. Especially the lowers. Not a real happy place on 2.7's. good luck
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r_towle |
Nov 26 2005, 08:13 PM
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#6
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Custom Member Group: Members Posts: 24,646 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
a compresion test will give you a rough idea...a leak down test will give you much more detail...
Rich |
Allan |
Nov 27 2005, 04:54 PM
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#7
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Put the car up on jack stands and crawled around for awhile hoping to find and obvious source of an exhaust leak but couldn't see anything based on my very limited experience. I did notice that one of the air injection ports was plugged with what looks like a 6mm bolt with the head sheared off. (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
Attached image(s) |
Allan |
Nov 27 2005, 04:56 PM
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#8
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
I know the picture sucks. I'll try and get better ones when I get the car on a lift. I also noticed that on 2 of the exhaust studs had a bushing/spacer looking thing under the nut. Any clue?
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echocanyons |
Nov 27 2005, 05:12 PM
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#9
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Advanced Member Group: Benefactors Posts: 2,096 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California |
Looks like the exhaust studs are for the thick manifolds with a spacer to take up the slack.
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Allan |
Nov 27 2005, 05:13 PM
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#10
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Only on 2 of them? |
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echocanyons |
Nov 27 2005, 05:17 PM
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#11
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Advanced Member Group: Benefactors Posts: 2,096 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California |
(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) maybe teh others were repladced with the proper ones
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Allan |
Nov 27 2005, 06:08 PM
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#12
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Teenerless Weenie Group: Members Posts: 8,373 Joined: 5-July 04 From: Western Mesopotamia Member No.: 2,304 Region Association: Southern California |
Okay, started the car and climbed under it and could definitely hear a leak but couldn't see or feel a thing. (IMG:http://www.914world.com/bbs2/html/emoticons/headbang.gif)
BTW, it gets warm quick under there... (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif) |
J P Stein |
Nov 27 2005, 07:14 PM
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#13
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
In the pic:
A spacer on a stud like that has to be thick....diameterwise. Tubing will deform quickly and allow the nut to loosen...gasket starts leakin'....yada. Note to cobblers: you're better off with a stack of washers. (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) To the upper right of your lower box....got it? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) There's a glob of black gooey lookin shittage. If the head starts leakin, that's where it will show and in that form..... I would put it in the air. Pull the headers. Replace the studs with the proper ones (this can be a real stinker as the old ones like to break.). The old gaskets will show signs of leakage if that is the problem......IF they seem good. Drain the oil. Pop off the lower cam covers. Check the head bolts for tightness (if none fall out in your lap.) Warm?. Indeed. It's a quicky, in and out..... Good luck. |
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