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#1 |
Senior Member
![]() Join Date: Apr 2013
Location: Podunk, Texas
Posts: 748
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Best way to find an exhaust manifold leak?
So I rebuild the carb and the old ‘67 runs like new...then the nasty click noise starts...it’s kinda loud when I first crank the truck, then it goes away when the engine warms up except it comes back when I accelerate, so I assume it’s a manifold leak, and I’m dreading what the fix may entail since the manifold has never been removed...so what’s the best way (or various good ways) to locate it?
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#2 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: Best way to find an exhaust manifold leak?
Take 2' piece of old garden hose and hold one end to your ear and use it like a "stethoscope" moving all around the manifold with the engine at idle. You'll know when you hear the leak.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#3 |
Account Suspended
![]() Join Date: Jul 2016
Location: Tacoma, WA
Posts: 6,873
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Re: Best way to find an exhaust manifold leak?
Have someone put their hand over the end of the exhaust pipe(s) while you look for the leak under the hood.
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#4 |
Registered User
Join Date: May 2013
Location: Oregon
Posts: 328
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Re: Best way to find an exhaust manifold leak?
I haven't actually tried this... but I wonder if you could just put a vacuum hose into a container of ATF and watch for smoke. I wouldn't recommend too much ATF at once, but a little won't hurt the engine.
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#5 |
Registered User
![]() Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: Best way to find an exhaust manifold leak?
your bare hand on cold engine running
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