Don Coatney Posted May 14, 2007 Report Posted May 14, 2007 Mark Hudson and I had a conversation about your wrist pin issue Saturday. His comment was "that is a very rare problem". I have been thinking about it and must ask the question. What is your piston to head clearance? You mentioned that you had de-carbonized your engine a while back and that you still had a lot of carbon buildup. Is it possible that the carbon buildup on top of the piston and on the combustion chamber side of the head reached a point where there was no "give"? Do your pistons when at top dead center extend above the top of the block? Think you see where I am going with this. Might be a good idea to use your dial indicator to measure this before you re-install the head. I will be looking for you in Tulsa! Quote
blueskies Posted May 14, 2007 Report Posted May 14, 2007 Don- Before I put the head back on, I'll check the pistons for clearance. I don't think the pistons clear the top of the block though, and I don't think there was enough carbon buildup to cause a "no-give" situation. But it's worth checking all the same. The bushing that failed, had spun in the rod. I'm thinking that perhaps this one rod had been over reamed by a thou or so, and the bushing didn't hold tight. Once it had spun, it was history. I'm still waiting for the pan gasket to put the oil pan back on. I'm tired of waiting, so I may salvage the old cork gasket that was on the engine for a few days, and save the new one for a spare. I'm planning on getting the head back on the car this week, if I can get my kids to bed early enough one evening . Looking forward to the drive, see you in Tulsa... Pete Quote
dmulhall Posted May 15, 2007 Report Posted May 15, 2007 I'm looking along the same lines... I have the same knock in my engine (218) pilothouse and I figured it was the rod bearings for sure.. when I took it apart, I thought garenteed that it was the bearings (after seeing the horrible condition)....they were standard bearings so I ordered new ones and put them in...the engine tightened right up and I was all excited to get it back on the road... the starter wouldnt turn it over fast enough because the bottom end was tight and was not started up yet so I pull started it... it ran for about 30 seconds and I noticed that the knock was still there and didnt get at all better... damn I was disappointed...but I have to rip it all apart again and pull the pistons out, check the wrist pins I guess...only other thing it could be really.. surprised that it really has only been myself and blueskies with this problem:mad: any "experienced" mopar L6 engine mechanics out there been through this before? Thanks, Dave Mulhall PS~ I baught a '49 special deluxe 2 door but havnt brought it home yet...anyone have any good ideas about getting mice out of the interior? preferably BEFORE I bring it home? Quote
dmulhall Posted May 15, 2007 Report Posted May 15, 2007 Hey Rodney, Can I borrow your new pet snake for a couple days?? Might be able to get my car home!! haha Quote
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