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Old 06-23-2007, 07:05 PM
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Originally Posted by techinspector1

Now, with the motor already assembled, I was trying to envision some way to check the gasket seal. Here's what I came up with:

What if you made a steel or aluminum plate to cover the carb mounting hole in the intake. Drill one 0.453" hole in the plate to accept a tubeless tire valve. Drill another hole and tap it to accept a 0-15 psi pressure gauge. Back off all intake rockers. Use a bicycle tire pump and attempt to slightly pressurize the manifold plenum/head ports. If you couldn't get any pressure built up to stabilize the gauge, wouldn't that indicate that there is lack of seal somewhere?

Like I said, please don't flame me for this, I'm just trying to come up with a workable solution for Joe Scratchrubber who may not even have shop air at his garage.

Doc here,


I think that's an inventive way to check internal leaks on an assembled Engine! Never would have occurred to me..

On my post I was referring to External leaks only , like carb to manifold, EGR to Manifold, Hoses, Bad Throttle-body sealing to the bowls, and the like..not internal leaks..

That other system you use is like "Plasti~gauge" For a Manifold another good check..When reassembling the engine.

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