87MJTIM Posted June 23, 2016 Posted June 23, 2016 I am working on a 4.0 out of a 93 XJ. I will install it into my 84 CJ7. I am changing all gaskets and seals first. I just took off the timing chain cover and found the chain has a lot of play (maybe). Based on the pictures, should I replace the chain? I don't know the miles on the engine.
87MJTIM Posted June 23, 2016 Author Posted June 23, 2016 I bit the bullet yesterday and ordered a complete set from Rockauto - chain and sprockets. The FSM said that if the chain deflection is more than 1/2" then it should be replaced. It looks like a 1/2" of movement.
Tykerp Posted June 23, 2016 Posted June 23, 2016 I would replace it. I bought a melling set when I built my 94 motor. Timing marks were 180 degrees off. Took me awhile to figure out why it would not run. I lined everything up properly according to alldata and Chilton. Finally inspected the old timing set and new one and figured out they marked it 180 off.
Minuit Posted June 23, 2016 Posted June 23, 2016 I've had 2 brand new Cloyes timing sets have a worrying amount of slack and make noise right out of the box. I don't know what a brand new factory one is like, but it seems like the aftermarket parts suck across the board.
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