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Leaky manifold?

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Mark (OK)

11-26-2000 17:02:50




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I think I might have a leak in the manifold. Makes a loud ticking sound from that side of the engine. Maybe it's just the gasket. How would you trouble shoot this problem?




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greg

11-26-2000 17:58:38




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 Re: Leaky manifold? in reply to Mark (OK), 11-26-2000 17:02:50  
The first thing I would do is borrow (or buy) a stethascope. You can find them for under $10.00.
Take a good listen to see if the sound is actually air escaping or a knocking coming from the valve train located under the covers behind the manifold. If you have an air leak it a simple process to remove the manifold and check for a crack, blowout, or rusted area on the mating surface. Mine was rusted pretty thoroughly and I had it resurfaced for 30 bucks. Some people prefer using two gaskets, but I prefer to have it fixed correctly.

Greg

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TimK

11-27-2000 07:15:42




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 Re: Re: Leaky manifold? in reply to greg, 11-26-2000 17:58:38  
I don't agree, respectfully, with the stethascope idea (although it is a good tool for finding errant noises in a running engine) for this reason. If it's a manifold leak, you're going to have to take off the manifold and either buy new or fix the old one. Bottom line = manifold comes off. If it's a loose valve adjustment, your going to have to take off the manifold to get at the valve cover and check the adjustment on all of the lifters. Bottom line = manifold comes off. One thing I would do before any else is pull of the governor off to make sure the noise is simply not bad fly balls in the governor. If it's not the governor, then you could spray some oil into the carb intake when the engine is running and look for the areas spewing smoke where the manifold may be leaking, so you can maybe focus in on the area you should inspect closely when the manifold is off. When the manifold finally comes off, even if I discovered a problem with it, I would consider giving the engine a valve adjustment as long as the manifold is off. My $.02.

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