ktm Posted March 30, 2008 Share Posted March 30, 2008 The latest event in my saga is my cam bit the dust. I have a P90a that was rebuilt back in November 2007 when I saw that I was losing coolant....that and when I did a compression test I had a geyser shooting out of cylinder #3. Anyway, recently I noticed a tapping coming from under the valve cover. When the head was fresh, it was SILENT. This tapping was rather obvious, not your normal lifter tick. When I removed the valve cover, the #3 cylinder (what is it with that cylinder) intake lobe was badly worn - there was a GROOVE in the lobe base circle! I checked the lifter to see if it had collapsed and upon touching it, found that the lifter had backed out! When it backed out, it lost oil pressure and did indeed "collapse". The lifter appears ok and I took the cam, lifter and rocker back to the machine shop after talking to them. They inspected the lifter and agreed that it should not have backed out. The rocker is gone too as it has a groove worn in it as well. In the end they are replacing the rocker and cam shaft, but this is yet another trial. Quote Link to comment Share on other sites More sharing options...
Calgary280ZT Posted March 30, 2008 Share Posted March 30, 2008 Sorry to hear it Bo. What would make the lifter back out? Defect in lifter? Improper assembly? Quote Link to comment Share on other sites More sharing options...
ktm Posted March 30, 2008 Author Share Posted March 30, 2008 Mark, they probably did not torque it to spec. The lifter simply threads into the head and it torqued like a bolt. The threads look fine and the lifter turns easily when threading it into the head. Ah well, I should have the new cam and rocker by Wednesday. Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 30, 2008 Share Posted March 30, 2008 Glad to hear that they are standing behind the work. Its always worrisome taking back something like that and asking them to fix it. Then not knowing if they will stand behind the work. Quote Link to comment Share on other sites More sharing options...
hughdogz Posted March 30, 2008 Share Posted March 30, 2008 ^^^ +1 It sounds like you're dealing with a reputable shop. It's great they will fix it, but a bummer that it happened in the first place. Quote Link to comment Share on other sites More sharing options...
aziza z Posted March 30, 2008 Share Posted March 30, 2008 sorry to hear that bo. btw did u ever get the front end fixed? Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted March 31, 2008 Administrators Share Posted March 31, 2008 Bo, I'm really sorry to hear that. Please keep us updated. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted March 31, 2008 Administrators Share Posted March 31, 2008 sorry to hear that bo. btw did u ever get the front end fixed? Aziza, You need to start posting with proper English. This is the third time I've made mention of this to you. Please read BOTH of these threads below, and when posting here on HybridZ in the future, lose the IM texting. I will not be mentioning this to you or asking any more. http://forums.hybridz.org/showthread.php?t=131518 http://forums.hybridz.org/showthread.php?t=115824 Paul Ruschman HybridZ staff Quote Link to comment Share on other sites More sharing options...
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