Jan Olsson Posted September 2, 2016 Report Share Posted September 2, 2016 No need to be worried just yet. When I fixed some burned exhaust valves on my 1993 STS I used Time-Serts because a lot of the thread material came out with the bolts. No bolts were loose I might add. Some believe that the threads give up and causes the gaskets to blow. I believe the other way round. The gasket gives up and with enough time maybe a thread or two gives up because of excessive movement and forces in the area of the failed gasket.That phenomenom would show itself with bolts so loose that you hardly have to turn them loose which is hard to separate from the fact that they all require litte effort to loose even when they are clamping as they are supposed to do. Long story short, I don't believe that there are many cases where the bolts actually has loosened themselves. I believe the most damage done to the threads is when you loosen them. In your case the original threads may be fine enough to be used as is. How was the old bolts looking? Nice and clean or gunked with aluminium debris? Quote Link to comment Share on other sites More sharing options...
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