My car burns oil.
Any opinions on whether it's bad/stuck rings or leaky valve seals?
'97 Honda Civic, single-cam VTEC, 179K miles on the clock.
Burns about a quart per 1000 miles.
I keep it topped up but I'm not so sure about previous owner.
I bought it at 150K, 13 months ago.
I've done 3 clean + rinse cycles of Auto-RX and did a Seafoam treatment of the intake/valves system. Did not Seafoam the crankcase system.
Recent 'tests':
1) I drove it till well warmed up, parked it for 30 minutes and then started it. I saw no smoke out of the tailpipe.
2) I went down a good long hill with foot off the gas, in 2nd gear, at 4000 rpm. That was maybe 30 mph. At bottom of hill I gave it gas to acelerate, about 1/2 to 2/3 throttle. Saw a big blue-gray smoke cloud behind me on the right side of car where the tailpipe is.
I've heard a couple different interpretations of the downhill-in-gear test. What do you think? Bad rings or bad valve seals? I think I can handle the valve seal job but I don't want to pull the head.
I'm considering doing a compression test but I'd like to see what you folks think.
Any opinions on whether it's bad/stuck rings or leaky valve seals?
'97 Honda Civic, single-cam VTEC, 179K miles on the clock.
Burns about a quart per 1000 miles.
I keep it topped up but I'm not so sure about previous owner.
I bought it at 150K, 13 months ago.
I've done 3 clean + rinse cycles of Auto-RX and did a Seafoam treatment of the intake/valves system. Did not Seafoam the crankcase system.
Recent 'tests':
1) I drove it till well warmed up, parked it for 30 minutes and then started it. I saw no smoke out of the tailpipe.
2) I went down a good long hill with foot off the gas, in 2nd gear, at 4000 rpm. That was maybe 30 mph. At bottom of hill I gave it gas to acelerate, about 1/2 to 2/3 throttle. Saw a big blue-gray smoke cloud behind me on the right side of car where the tailpipe is.
I've heard a couple different interpretations of the downhill-in-gear test. What do you think? Bad rings or bad valve seals? I think I can handle the valve seal job but I don't want to pull the head.
I'm considering doing a compression test but I'd like to see what you folks think.