Pulled the plugs today..., Compression check, got confused... |
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Pulled the plugs today..., Compression check, got confused... |
blk'72 |
Apr 10 2005, 12:39 AM
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#1
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Member Group: Members Posts: 83 Joined: 2-November 04 From: Pleasanton, CA Member No.: 3,053 |
Hey all...
I had a exhaust leak coming from the right heads/exhaust headers... SO a I wanted to see if that was just a leak, and if internals got damaged? Pulled out the headers, and exhaust, and headers are all black and greasy! Plugs out and they look ok, just a little black but nothign crazy(NO CRACKS< NOTHING JAMMED). Now here's where I need help.... How do you do a damn compression check! I have the tester, and what ZzE fuck de bordel de merde should I do whith it? Anybody uses them who can help? Thanks a bunch.... My offer for the east bay peeps is still good....anybody want to come over to pleasanton tomorrow after 4 is welcome to....Hopeyard and corte sierra. GImme a call, we can work on cars together 925.989.7345 Fum times (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) R. |
john rogers |
Apr 10 2005, 12:47 AM
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#2
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
The engine should be warm to do an accurate test but if it is cold it will be a little low since the rings will not be seated as good as could be. To do one, pull the plugs, lock open the throttle wide, put a charger on the batt so it is at full power the put the compression tester in #1. Have someone crank the engine and watch the gauge jump up. It is important how fast it rises and it should get close to full pressure in just a few cranks then a few more to top off. Bleed off pressure and repeat for #2, 3 and 4. Compare the rate of rise and total pressure and they should all be close. If you have a radical cam with lots of overlap then the rise will be slower than for a stock type of cam shaft. Good luck
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