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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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 Air Leak at Gasket for BPS Crossover Noticed yesterday that if I put my hand where the muffler bolts to motor, there was a constant stream of air coming from the gasket. Air flow increases with throttle, obviously. Have had this muffler on here for about 6-7 years with no issues. Is there a quick fix or do I need to install a new gasket?
Motor runs fine. How much does this affect performance?
Could try and tighten the bolts up but with my luck I would break a bolt head off.
Thanks,
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Phowler Extreme 1848 with 36PDFPR
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| Mon May 08, 2017 8:52 am |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: Air Leak at Gasket for BPS Crossover You need to replace the gasket.
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| Mon May 08, 2017 8:55 am |
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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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Re: Air Leak at Gasket for BPS Crossover Thanks CB.
How much does this affect performance? Imagine it affects compression??????
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Phowler Extreme 1848 with 36PDFPR
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| Mon May 08, 2017 8:59 am |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: Air Leak at Gasket for BPS Crossover Won't affect compression. Probably won't cause immediate performance problems. You don't want the cool air getting sucked back up in the engine.
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| Mon May 08, 2017 11:17 am |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm
Posts: 2377
Location: West Coast Wisconsin
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Re: Air Leak at Gasket for BPS Crossover Get yourself some soft copper that is slightly thicker than the stock gasket and make a pair of gaskets using a stock gasket for a template. It helps compensate for inconsistencies in head and exhaust flanges once tightened down.
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| Mon May 08, 2017 12:24 pm |
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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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Re: Air Leak at Gasket for BPS Crossover Thanks 50. Saw a thread on here to use this. Seem like thicker than the BPS ones. Any thoughts?
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Phowler Extreme 1848 with 36PDFPR
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| Mon May 08, 2017 12:38 pm |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm
Posts: 2377
Location: West Coast Wisconsin
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Re: Air Leak at Gasket for BPS Crossover
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| Mon May 08, 2017 12:40 pm |
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Smoke
MMT 1000 Club
Joined: Fri Jan 23, 2009 1:27 pm
Posts: 1095
Location: SW Michigan
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Re: Air Leak at Gasket for BPS Crossover Get the cb gaskets they are the best and at least 5 times as thick as stock and twice as thick as bps gaskets. I've reused them and still no leaks. You get 4 per package because they are for a vw engine. Best gaskets i've found.
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| Tue May 09, 2017 4:27 am |
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godvl
MMT Pro Member
Joined: Fri Feb 06, 2009 8:36 am
Posts: 253
Location: Nac-o-no where, tx
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Re: Air Leak at Gasket for BPS Crossover Double check that it's not just the air from the fan that's blowing through there. I thought the same thing at first back when I built my motor tried different gaskets and come to find out it was air from the fan blowing through the shields and out right there where the muffler bolts up
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| Wed May 10, 2017 10:57 am |
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godvl
MMT Pro Member
Joined: Fri Feb 06, 2009 8:36 am
Posts: 253
Location: Nac-o-no where, tx
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Re: Air Leak at Gasket for BPS Crossover
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| Wed May 10, 2017 11:01 am |
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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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Re: Air Leak at Gasket for BPS Crossover
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Phowler Extreme 1848 with 36PDFPR
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| Thu May 11, 2017 8:17 am |
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