frapjap Posted June 19, 2014 Share Posted June 19, 2014 Hi fellas. Some background info- 2007 2.5i, 104,000 miles. I've been burning a good bit of oil between intervals, but no worse than the specified allowance. On my last oil change, I noticed that the oil was low, and also light brown, thin, and a little bubbly. It didn't smell of coolant, but oil doesn't look like that any other way. Assuming one of the head gaskets is on its way out, I decided to do a compression test. Results are below Cyl 2- 180 Cyl 4- 180 Cyl 1- 180 Cyl 3- 210 What gives? Do I have oil or coolant in that cylinder interfering with the test? Is the tester reading high and I have 3 low cylinders and one good one? Could one head be torqued down harder in the corner than the others? Am I fine? Should I tear into it anyway? Any help is appreciated, I'm stumped. Link to comment Share on other sites More sharing options...
Brian3676 Posted June 19, 2014 Share Posted June 19, 2014 Leakdown test Link to comment Share on other sites More sharing options...
frapjap Posted July 9, 2014 Author Share Posted July 9, 2014 Leakdown was inconclusive, as in not really showing any real problems. I planned on tearing down the engine regardless of the outcome. The head gaskets were replaced this past weekend. The passenger side gasket was in so-so condition. It would have been okay to run for a little longer if I needed it to, but would be causing some real problems in the near future. Drivers side was fine. However, there wasn't anything detectable on that gasket or during the tear down that could explain the high compression on cylinder 3. I did discover that the engine is a LKQ engine. If it was rebuilt, maybe they used the wrong piston? Who knows. As soon as the accessories are put back on and the motor is completely back together I'll do another compression test to see if the issue remedied itself. Link to comment Share on other sites More sharing options...
GEE-OTTO Posted July 10, 2014 Share Posted July 10, 2014 if its LKQ prob incorrect piston or maybe a corner cut to avoid milling the crank, unfortunately. Link to comment Share on other sites More sharing options...
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