subaru360 Posted June 17, 2009 Share Posted June 17, 2009 If you look through the archives you'll see that cam shaft seizure is a problem with 2.5 L DOHC engines. The oil passages to the cams are very narrow. Usually the failure occurs after engine work. The culprit? Almost always a piece of silicone sealant. Be very wary of slicone sealant ''squeeze out" when sealing any parts on this engine. Even a very tiny of stray silicone sealanr can cause cam failure. I thnk that the early 2.5L SOHC engines had narrow cam oil passages as well. I see this sometimes. A chunk of silicone in the oil passage to the head right at the headgasket. Usually it breaks off from excess silicone on the oil pump. Cam seizes, pulley shatters. I have a single head I can sell really cheap since it's not part of a pair and is kind of useless to me. I'll try to remember to look and see which one I have. Quote Link to comment Share on other sites More sharing options...
98sub2500leg Posted June 17, 2009 Author Share Posted June 17, 2009 I see this sometimes. A chunk of silicone in the oil passage to the head right at the headgasket. Usually it breaks off from excess silicone on the oil pump. Cam seizes, pulley shatters. I have a single head I can sell really cheap since it's not part of a pair and is kind of useless to me. I'll try to remember to look and see which one I have. I greatly appreciate it. I worked a deal with MJDJD. Hopefully, I will find the answer. At this point I hope it is a clog so I can close the issue. Quote Link to comment Share on other sites More sharing options...
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