Harold Bawlzangya Racing

Pressure tester

I needed to do a real pressure test on the engine to once and for all rule out the clutch side crank seal as the culprit of the spooge problem I’ve developed recently.  The engine is 17 years old and I have no idea how many hours were on the bottom end before I got it several years ago.  I was fully expecting to need to rebuild the bottom end.

Many people remove the pipe and use an automotive freeze plug to seal the exhaust side of the engine.  I was going to leave the pipe on, but wasn’t sure how I was going to seal the end of the pipe.  A trip down the bolt section of Lowe’s gave me an idea.

I was going to make my own “freeze plug” out of this item – only $1.04:

pipe plug-stopper (1)

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pipe plug-stopper (8)

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pipe plug-stopper (9)

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I put it in the end of the pipe with just a single washer on each end and quickly realized it wasn’t going to work.  The washers were too small in diameter and were bending under the force.  The plug wouldn’t seal.

pipe plug-stopper (10)

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So a few more washers of increasing diameter did the trick:

pipe plug-stopper (6)

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Pipe plug-stopper final

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Here are the parts for the rest of the tester.  I had everything except the tire gauge from a shock-nitrogen fill set-up:

Pressure tester parts

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After sealing all the threads, almost ready to test:

pressure tester assembled

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Hooked up and ready to go:


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From what I’ve read, you want 6-8 psi, no more than 10, and the 10 minute mark seems to be the magic number.

After 5 minutes:

Pressure test 5 min

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After 10 minutes:

Pressure test 10 min

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And for kicks I let it go for 30 minutes:

Pressure test 39 min

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One less thing to spend money on right now.

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