Question about 1990 Honda Accord

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90 honda accord with excessive oil smoke. All cylinders have 180 psi compression,valve seals have been replaced. please help

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Even with good compression the oil control rings can pass oil in to the combustion chamber, the crank case breather system could also be rstricted, not just the PCV but the passages in and out of the engine.

Posted on Nov 12, 2009

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It could be a oil control ring on piston or oil control valve on head or valve guides to worn or improper valve seal replacement or head gasket cracked head etc

Posted on Nov 12, 2009


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the compression is not bad however #2 is a bit low. what did the plug look like on #4. was it oily in appearance or chalky white. if it has an oily appearance then that cylinder is burning oil. it could be valve seals or valve guide clearance is too much or oil rings for that cylinder. the other colour is carbon meaning the cylinder is not burning properly. could be a weak ignition component that affects that cylinder or the cylinder has a lot of carbon build up in it. if it was white in colour then your burning coolant. not sure what you mean by header smokes bad, do you mean at the head if so then you may have something leaking onto it and its burning off.

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Oil in #1 spark plug tube, plug wire popped off changed valve cover gasket and the upper tube seals. It ran fine for about an hour then started missing again

Was the plug fouled again after you made repairs? Did you install a new plug and run it? If the plug itself is fouling you probably also see blue smoke in the exhaust pipe. Get the engine warm, check compression and do what is called a cylinder leakage test, it puts a volume of air into each cylinder with the valves closed and how much air leaks out determines the over all health of the engine. Does the engine have excess oil consumption? The oil entering the cylinder and fouling the plug can enter from a worn valve guide or guide seal, a worn or damaged oil control piston ring or a worn or damaged piston bore or piston, none of which are going to be inexpensive to fix.

Good luck, i hope this helps.

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