 Exhaust popping issue - question before i re-install, new pics added of car |
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| william1764 |
 Aug 24 2010, 08:56 PM
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Member  Group: Members Posts: 252 Joined: 11-May 10 From: maryland Member No.: 11,717 Region Association: MidAtlantic Region  |
I removed the muffler to replace the gaskets in an effort to rid the popping on decel. Won't re-install until tomorrow because I decided to clean up muffler apply a coat of heat resist paint. Out of curiosity I started the car with just header/exchanger to see if popping still existing - it did. Does this mean my leak is before the muffler gasket (exhaust manifold gasket) or is this typical without muffler installed . BTW - there was clear evidence that the exhaust was escaping at least at one of the the muffler gaskets as you could see black residue on the bottom outside edge of the gasket (no seal).
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| Bleyseng |
Aug 25 2010, 05:38 AM
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I'd pull the heat exchangers too and change the copper O ring gaskets. Before re-installing anything carefully flat file the gasket surfaces so they are flat and clean! On the Heat changers carefully maintain the same plane of the surface. Usually all these surfaces get distorted by torqueing on the bolts over and over again until they are not flat causing leaks.
To remove the Heat exchangers spray the nuts with PB Blaster one day, then again the next day and then carefully loosen em in a back and forth motion to not snap the exhaust studs. GO SLOW! Use lots of PB Blaster to keep the rusty suckers from binding and snapping the studs... (IMG:style_emoticons/default/chair.gif) Then pull out the copper gaskets and install the new ones and don't over tighten the new copper nuts and snap a stud. Use all new nuts and bolts on the muffler to Heat exchanger, I like to use Stainless ones... |
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| PeeGreen 914 |
Aug 25 2010, 09:46 AM
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#3
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Just when you think you're done...wait, there is more..lol Group: Members Posts: 10,219 Joined: 21-September 06 From: Seattle, WA... actually Everett Member No.: 6,884 Region Association: Pacific Northwest 
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QUOTE(Bleyseng @ Aug 25 2010, 04:38 AM)  I'd pull the heat exchangers too and change the copper O ring gaskets. Before re-installing anything carefully flat file the gasket surfaces so they are flat and clean! On the Heat changers carefully maintain the same plane of the surface. Usually all these surfaces get distorted by torqueing on the bolts over and over again until they are not flat causing leaks. To remove the Heat exchangers spray the nuts with PB Blaster one day, then again the next day and then carefully loosen em in a back and forth motion to not snap the exhaust studs. GO SLOW! Use lots of PB Blaster to keep the rusty suckers from binding and snapping the studs... (IMG:style_emoticons/default/chair.gif) Then pull out the copper gaskets and install the new ones and don't over tighten the new copper nuts and snap a stud. Use all new nuts and bolts on the muffler to Heat exchanger, I like to use Stainless ones... (IMG:style_emoticons/default/agree.gif) Great advice |
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| DRPHIL914 |
Aug 25 2010, 10:12 AM
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Dr. Phil Group: Members Posts: 5,821 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(Phoenix 914-6GT @ Aug 25 2010, 11:46 AM) QUOTE(Bleyseng @ Aug 25 2010, 04:38 AM) I'd pull the heat exchangers too and change the copper O ring gaskets. Before re-installing anything carefully flat file the gasket surfaces so they are flat and clean! On the Heat changers carefully maintain the same plane of the surface. Usually all these surfaces get distorted by torqueing on the bolts over and over again until they are not flat causing leaks. To remove the Heat exchangers spray the nuts with PB Blaster one day, then again the next day and then carefully loosen em in a back and forth motion to not snap the exhaust studs. GO SLOW! Use lots of PB Blaster to keep the rusty suckers from binding and snapping the studs... (IMG:style_emoticons/default/chair.gif) Then pull out the copper gaskets and install the new ones and don't over tighten the new copper nuts and snap a stud. Use all new nuts and bolts on the muffler to Heat exchanger, I like to use Stainless ones... (IMG:style_emoticons/default/agree.gif) Great advice (IMG:style_emoticons/default/agree.gif) and this is much harder than it sounds! I am doing the same right now, trying to remove the old shot 75 he. and replace with 74 system, but cant get these things off PB blaster and all, and i am afraid of breaking off the exhaust studs!!! Good luck with yours, phil |
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Posts in this topic
william1764 Exhaust popping issue - question before i re-install Aug 24 2010, 08:56 PM
Phoenix 914-6GT Are you sure the leak isn't at the head to exc... Aug 24 2010, 09:04 PM
william1764
Are you sure the leak isn't at the head to ex... Aug 24 2010, 09:13 PM Phoenix 914-6GT
Are you sure the leak isn't at the head to e... Aug 24 2010, 09:14 PM Phoenix 914-6GT Also, be sure you get the surfaces nice and even b... Aug 24 2010, 09:06 PM avidfanjpl You definitely have a heat exchanger/muffler leak ... Aug 25 2010, 12:11 AM william1764
You definitely have a heat exchanger/muffler leak... Aug 25 2010, 05:09 AM william1764
I'd pull the heat exchangers too and change t... Aug 25 2010, 10:59 AM underthetire I know i'll get flamed for this, but I actuall... Aug 25 2010, 10:18 AM |
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