I have a '78 Buick Regal with a 3.8l 231cc Buick V6. The Chilton's says to replace the timing chain at 120-150k. The car has 133k. I've been told not to worry, but I understand that if the thing breaks it can trash the engine. What would you folks advise? Does it give much in the way of warning signs before it goes? Also, would getting a new chain improve performance?
When to replace timing chain on 78 Regal?
May 17, 2005
2 Replies
First reply
There really is no interval on timing chains, but you can get some idea of the play by getting a socket on the crank pulley bolt and rotating the crank back and forth just enough to feel the free play before the cam moves, this is a judgement call here, but there should be…
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Does it give much
Some " Muscle cars " would break chain at 50,000 miles or sooner A broken chain may / may not damage valves Check all valves after a failure. The V6 has fewer valves, less lift, so I could understand the rational in not bothering. If the engine runs good, doesn't gulp oil, new chain, sprockets, water and fuel pumps, all easy to get at, gotta come off anyway parts.
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