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#1
01-29-2003, 02:24 PM
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91 420 sel
Hello people,
Sorry to burden you with a "gasoline" questions, but I need goods and bads of the 1991 420 sel. to buy or not to buy, that is the question? Approximately 150,000 miles, decent condition. Timing chain? What to questions and look for? Blair
__________________
Blair 1983 300D-T Black 
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#2
01-30-2003, 02:42 AM
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At 150k, it is time to do the chain, guides and tensioner, if it hasn't already been done.
The engine should be pretty quiet, if you hear excessive grinding coming from the valve covers, stay away. Let it idle and look for blue smoke (valve guides). If there is a miss or stumble at hot idle it is probably a spark plug or two fouled from bad valve guides. Drive the car easy and hard and see how it shifts in both situations. Other than that, nothing to really look for. Good luck.
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