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#1
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header leak?
Well, I hear either a somewhat highpitched rythmic hissing sound, or a possible tapping in my passenger side toward the front of the block. I hope it is an exhaust leak, but it might be a valve tap I guess. It seems to come from the side by the front header, at the same level as the header, and not above the valve covers. Any idea if this could be a header exhaust leak, or something more serious? The car seems to run the same, but I only had it for a lil over a month.
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#2
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Re: header leak?
You can use a piece of garden hose to narrow down the leak ... it's not unusual for the headers to leak if they are cracked in the normal places (between #3 and #5 cylinders near the block).
See: http://www.gnttype.org/techarea/engi...dercracks.html
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#3
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Re: header leak?
I'll look at the usual areas, can you elaborate on the garden hose?
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#4
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Re: header leak?
Use a 1-2 ft long piece as a crude stethoscope ...
Hold one end to your ear and run the other end around the engine to localize the noise ... not terribly sophisticated, but works for me!
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#5
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Re: header leak?
well, I narrowed down the noise coming at the front passenger side part of the header, but I dont see any crack or feel any for that matter. I see an aftermarket(not original) bolt on the front part of the header, the bottom one to the head, could it be the header not seated right from a possible loose bolt or not tight enough? Would this make the noise I described earlier? thanks.
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#6
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Re: header leak?
Yep, or it could be warped or misaligned.
__________________
Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#7
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Re: header leak?
well, I guess I'll take the headers off that side and see if I can reseat it or fix the problem, I read from another post to use that copper rtv, so I'll start with that. Thanks for the help Ken.
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#8
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Re: header leak?
Before you put it back on, it'd be worth it to use a machinist's rule to make sure the flange is flat ... if not, you can use a belt sander or an end mill and "kiss" it enough to square it back up.
__________________
Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
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