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Old 03-23-2015, 02:15 PM   #1
Artist, 986S tinkerer
 
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Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
DIY leak down test fun!

I've done my first attempt at a leak down test with my new tester. It is a model that has two pressure gauges (0-100). It was not an easy job to do by myself with the car on jackstands.Much easier on a lift. I want to redo the test (glutton for punishment) but I want to clarify a few things.
1. Engine warm, right? I've heard warm and cold.
2. I have used a balloon on the adapter hose to discern the compression stroke of #1 cylinder, as well as the others. Is there an easier way? I figured that if I followed the firing order that might be an indicator.
3. TDC is difficult to ascertain in the boxster with the chopstick method because you need to crank from the inside then check the stick, and repeat and repeat for each cylinder! Am I missing something?
4. I pressure up the tester using the adjustment knob once the connections have been completed (compressor-tester-cylinder). This is the right procedure?
Any enlightenment here would be greatly appreciated!
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James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow!
Sold to a cool racer chick: 2004 986 S
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