excessive smoking on 1990 Mercedes-Benz 420SEL

car smokes after being driven for half hour around town or up hill, car has 148,000 miles and has been resonably well maintained. It uses about 1 quart oil per 3,000 miles. Thanks.

by in Chehalis, WA on October 07, 2010
1 answer 1 comment
ANSWER by on October 12, 2010
Worn valve guides or failed valve guide seals and piston rings worn or sticky can cause that concern. Greg
COMMENT by on November 12, 2010
Thanks-sorry to get bacxk so late

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