mountain brat Posted October 14, 2009 Share Posted October 14, 2009 would you buy a 2.2 with 170 on all four? whats best around 190? Link to comment Share on other sites More sharing options...
lmdew Posted October 14, 2009 Share Posted October 14, 2009 If the price is right. It's very hard to get a good compression test unless the engine is running. It should be up to temp, full charged battery, all plugs removed, throttle wide open and then each cyc checked. It's good that they are all the same, if the plugs look good and the coolant overflow does not show signs of HG failure, I'd have no problem with 170. If you are not at sea level that will make a difference as well. 6200' in Colorado Springs, CO 170 is good Link to comment Share on other sites More sharing options...
mountain brat Posted October 14, 2009 Author Share Posted October 14, 2009 its at a junkyard ive bought motors from before they test and pull for $500 probably will work hopefully Link to comment Share on other sites More sharing options...
OB99W Posted October 14, 2009 Share Posted October 14, 2009 would you buy a 2.2 with 170 on all four? whats best around 190? Compression pressure depends on several factors. Earlier EJ22 engines had 9.5:1 compression ratio, later (starting MY '97) went to 9.7:1. As Larry pointed out, altitude also makes a difference. If you're at 1/2 mile up in Tieton, WA, then 170 psi all around probably indicates a healthy engine, at least in that respect. Link to comment Share on other sites More sharing options...
mountain brat Posted October 14, 2009 Author Share Posted October 14, 2009 i think were at 1500 ft and its a 96 2.2 i want to put in 98 obw Link to comment Share on other sites More sharing options...
mountain brat Posted October 15, 2009 Author Share Posted October 15, 2009 (edited) anymore info?most of the motors i've bought from there before were in the 185-190 range Edited October 15, 2009 by mountain brat Link to comment Share on other sites More sharing options...
OB99W Posted October 15, 2009 Share Posted October 15, 2009 anymore info?most of the motors i've bought from there before were in the 185-190 range If those other engines were of the same compression ratio and tested identically, then perhaps this one is a little ''tired''. Since the compression readings are even, it's more likely that being lower would be due to ring wear rather than valve problems. If a ''wet'' compression test is done, and the numbers come up significantly, it could confirm ring-sealing problems. Link to comment Share on other sites More sharing options...
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