Quote:
Originally Posted by Strife
2. The UPPER guides don't need timing cover removal. HOWEVER, if a piece or pieces fell in the engine, I'm pretty sure some serious work is required to drop the oil pan to get it, unless you are lucky and can account for everything. There have been SOME who have left them there - personnally, I wouldn't do this.
5. Typically this DOES happen at startup; the consensus is that the tensioner (which you also MUST replace but not very expensive) gets old, leaks, and doesn't keep the chain tight upon startup until oil pressure returns, the chain slaps the guides, they break, and so forth. BTW check your valve cover to see if it cracked - used, not too bad but $$$ new.
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Re #2: He said he found the piece, and therefore wouldn't require removal of the pan to find said piece.
#5: I heard it happens on shutdown, when the engine may turn backwards due to pressure of combustion on the very end. I often notice my fan make a slight "backwards" move on my m117. When it turns backwards, the loose chain "Jumps a tooth" on the sprocket. The next time you go to start it, it doesn't fire, and the starter is what causes the valves to smack the pistons and bend them.
If he wants to charge you $6500, I am pretty sure you can get a reman 420 engine AND have it installed for that price.