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Old 10-19-2000, 05:09 PM
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I have just purchased a 1983 380SEL. It is a one owner car with the odometer showing 335,000. The car doesnt smoke or knock but it is missing on one or more cylinders.Ignition parts have been replaced. Are the valves adjustable( I can hear some valve noise)? Could the problem be a burned valve? What diagnostics should be done and is it really worth putting money into? Should the whole enging be rebuillt or maybe just a valve job? It is really a nice clean car.
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Old 10-20-2000, 07:31 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The bottom end of those motors go forever. I have done valve jobs on many with that amount of miles.

You need to identify which cylinder is misfiring. The reasons fall within the basics or combinations of such. The basics are: compression, fuel, ignition and throw in timing. If you are worried about the integrety of the motor a compression/cyl leakage test should be done. Compression problems are almost non-existant on these motors but you do have a lot of miles.

Common single cylinder misfires at idle occur due to: ignition components (mostly plug end resistors), injector failures (usually due to trash), and vacuum leaks.

[This message has been edited by stevebfl (edited 10-20-2000).]
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