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Just changed valves in your 1991 civic why is it still burning blue?
Wiki User
∙ 18y ago
Blue exhaust smoke is not a sign that the valves are the only thing in need of attention. If the rings are shot, you can get blue smoke, as you also can anytime there is an abundance of oil being drawn into the engine to be burned--- like through a defunct pcv valve. An excess amount of oil in the crankcase can also flood the cylinder walls and cause this, usually when the overfill is in excess of 1qt. jb So do a compression test to see if the compression is equal (+/-10%)in all four cylinders and pull the PVC valve and ascertain it is operating properly or replace same.
Wiki User
∙ 18y ago
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