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Old 03-08-2008, 04:54 AM   #1
rexspeedmaster
Scooby Specialist
 
Member#: 123103
Join Date: Aug 2006
Chapter/Region: MAIC
Vehicle:
2003 WRX
Full 07 STI trans

Default Harbor Freight Compression Tester

Not sure if this is the right thread but hereitgoes!

I bought this and decided to do a compression test. I have done one once before with a different tester that worked fine. I bought this one from H-freight for like 5 bucks or something and it looked ok! I began to do the test and I worked fine. However the design of the tester is flawed. The adapter to screw into the plug socket comes loose of the actual hose and the gauge. This means that you can screw in the adapter to the plug hole in the head without the hose. The first two cylinders worked out fine. However on the 3rd cylinder the adapter got stuck in the head. Then came the problems. After about an hour my friend figured that we could hollow out an old spark plug and screw it into the adapter and thus break it free from the head. The design of this tester is flawed simply because the adapter comes loose, there is no mechanism to lock it in place. That is what caused it to become stuck. It turned a 1/2 hour job into a 2 hour job.

So just a warning to people if they buy this tester, be careful not to get the adapter suck into the head, otherwise... you have to pull the engine, or hollow out an old spark plug.
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Old 03-08-2008, 01:34 PM   #2
haloseven
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Member#: 34683
Join Date: Mar 2003
Chapter/Region: TXIC
Location: Fort Worth, Texas
Vehicle:
2015 WRX Premium
Ice Silver

Default

or buy help! brand spark antifoulers, which are designed to do the same thing. remove broken spark plugs.
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