adallak Posted June 13, 2008 Report Share Posted June 13, 2008 Scheduled coolant changes likely reduce the probability of Northstar’s notorious headbolts- pull-out problem. I heard many times that electrochemical reaction between steel bolts and an aluminum block might be responsible for the same problem as well. 1. Are they stainless bolts? 2. Anodized steel? I assume the aluminum internal threads are not treated. 3. Does the factory coat the bolts with something before screwing them in? Now, I heard many times that the timeserted engine is better than new one… It may be true or not. It usually takes some 6-8 years before the bolts fail. Probably timeserted engines just did not have enough time passed to fail again. I do not know. The insert is steel as well, right? So there will be the same electrochemical process between the insert and the block. 4. What is the thread pitch (external) of timesrts? Thank you. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
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