oil in cylinders
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oil in cylinders
Hi , just reworjed my head( burnt valve) now after reassembling the motor, I am still smoking and now have oilie plugs in 2 and 3rd cylinders. checked compression and its good, just under 200 in all cyl, what could be causing the smoking and oilie plugs, havent driven the car, just started it and let it run for about an hour, 91 civic lx sedan 1.5 l
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Re: oil in cylinders
STILL smoking?
Assuming the smoke is unrelated to the head install and gasket........
Valve stem seals or oil control rings, take your pick.
If it was smoking before you had valve problems.....I'd guess rings. Got high miles?
Oil ring problems can't be found with a compression test.
Got visible smoke from the exhaust?
Intake stem seals tend to smoke more during periods of high intake manifold vacuum (deceleration, long periods of idling). Let it idle a long time then blip the gas and see if it pumps out a puff of smoke.
Rings tend to smoke more with loads and higher RPMs (while driving). Follow the car and watch for smoke, but pay attention to if it is accelerating or decelerating when you notice it.
Exhaust stem seals.....may or may not smoke, if they leak oil it won't show up in the cylinders it will go straight into the exhaust.
Assuming the smoke is unrelated to the head install and gasket........
Valve stem seals or oil control rings, take your pick.
If it was smoking before you had valve problems.....I'd guess rings. Got high miles?
Oil ring problems can't be found with a compression test.
Got visible smoke from the exhaust?
Intake stem seals tend to smoke more during periods of high intake manifold vacuum (deceleration, long periods of idling). Let it idle a long time then blip the gas and see if it pumps out a puff of smoke.
Rings tend to smoke more with loads and higher RPMs (while driving). Follow the car and watch for smoke, but pay attention to if it is accelerating or decelerating when you notice it.
Exhaust stem seals.....may or may not smoke, if they leak oil it won't show up in the cylinders it will go straight into the exhaust.
Honda Maniac!
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I vote for valve stem seals. Surprised the machine shop didn't put 'em in when reworking the head.
Can the Civic's be replaced on the car? (They pressurize the cylinder with a closed valve and replace them.)
Can the Civic's be replaced on the car? (They pressurize the cylinder with a closed valve and replace them.)
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: oil in cylinders
That didn't narrow it down any. Hell, at 180k I'd say to do it all.
You sure PCV doesn't have anything to do with all the smoke?
Is it losing oil? Is it losing coolant?
