exhaust manifold leak

peter e mark · Post by **peter e mark** » Fri Apr 25, 2008 9:50 am

Hello everyone, you too Knattrass, and todays question is: How do I find where that M37 exhaust leak is ? (My nieghbors are planning to put my house up for sale ! ) Peter Mark

Lifer · Post by **Lifer** » Fri Apr 25, 2008 11:52 am

One method is to soak all the connections soapy water, start the engine, and look for bubbles to appear. My first guess is that you have a leaking manifold gasket. (Leaks in the pipe joints should be fairly easy to spot.) With a tight exhaust system and a good muffler, your neighbors shouldn't be bothered at all. It will never be as quiet as a new Cadillac, but it will be quieter than (for example) a lawn mower.

peter e mark · Post by **peter e mark** » Fri Apr 25, 2008 3:42 pm

Thank You Lifer, But will it be quiter than my oxy-propane .50 caliber reenactment machine gun? Well, I have something even LARGER, yes, a 13.2MM Hotchkiss Anti Aircraft cannon ! But since 911, we are discouraged from mounting our "props" on our vehicles while in the parades , at least in New York City. I will test my exhaust system and see what it is. Peter

Post by **Monkey Man** » Sat Apr 26, 2008 3:01 am

G'day Pete.......
I usually take some flexible fuel line, place one end near (not in!!) my ear and go hunting for the leak using the other end as a probe, you'll soon hear where it is coming from, you can also buy an automotove stethescope that has the fitting on the end for a metal probe or a tube for diagnosing all manner of faults.
Take Care

Regards - MM

peter e mark · Post by **peter e mark** » Sat Apr 26, 2008 4:44 pm

Thanks Monkey Man, I will surely try this . Peter

knattrass · Post by **knattrass** » Mon Apr 28, 2008 5:36 am

We soap'd the joints and put a rag in the tailpipe to increase the back pressure (not totally blocking the opening)and turned it over.

Of course, you could attempt the Long Island method of putting your lips over the tailpipe and blowing!!! Eitherway, you'll see the "tiny bubbles".

You knew I'd take the bait didn't ya? (good to hear from you!)

peter e mark · Post by **peter e mark** » Mon Apr 28, 2008 9:22 am

KNATTRASS ! Where do you get these ideas about Long Islanders ? Now let's be reasonable, The real Long island method is to pressurize the tailpipe, say with propane; acetalyne is even better . Then leak test the exhaust using a match...works every time , (if you survive )