seven 202 #1 Posted July 19, 2016 I tested compression and I'm getting 75 I don't know if it burns any oil or not it starts and runs real good.i have taken these engines apart before and re ringed em looking for opinions I guess? Share this post Link to post Share on other sites
Ed Kennell 42,075 #2 Posted July 19, 2016 Is this an ACR (automatic compression release) engine? Share this post Link to post Share on other sites
seven 202 #3 Posted July 19, 2016 That I do not know? Share this post Link to post Share on other sites
oldredrider 2,553 #4 Posted July 19, 2016 A 1967 model engine will have the ACR. To get a true reading you would need to do a leak down test. 1 Share this post Link to post Share on other sites
seven 202 #5 Posted July 19, 2016 I don't know much about engines but I don't think It matters if it has compression release or not for testing Share this post Link to post Share on other sites
953 nut 60,128 #6 Posted July 19, 2016 8 minutes ago, seven said: think It matters if it has compression release or not for testing As the piston reaches TDC the exhaust valve lifts slightly at low RPMs to make it easier to crank over. Open this atachment and read it over. Engine Leakdown Tester Build Your Own.pdf 1 Share this post Link to post Share on other sites
seven 202 #7 Posted July 19, 2016 so 75 psi with a compression really thing on engine probably not bad ..? Do you know if my c160 has the same thing Share this post Link to post Share on other sites
