New timing chain is loose
#1
Newbie
Thread Starter
New timing chain is loose
I've got a new timing chain on my stock engine, and there is more than half inch of slop in the new chain on the new sprockets. I was under the impression it shouldn't move more than 1/8 in Max brand new. That's why I replaced the old one in the first place, it has pretty much the same amount of play.
there is a rubber tensioner in the cover, but even before I took it off there was about. 450" of play in the chain.
am I just overreacting? Any suggestions would be appreciated, thank you.
there is a rubber tensioner in the cover, but even before I took it off there was about. 450" of play in the chain.
am I just overreacting? Any suggestions would be appreciated, thank you.
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Spencer_P (06-15-2020)
#4
Old fart with a wrench
I've been thinking...can you smell the wood burning?...When I did my chain set, it was loose too. I was amazed that there didn't seem to be much wear after 200K miles. I replaced it because I felt the power was dropping off and thought maybe the valve timing had something to do with it, but no, no improvement. It was rings....
#5
Newbie
Thread Starter
Honestly I just left it, I got a different chain and took measurements with digital calipers. It was exactly the same (within .003"). So I just left it, we'll see what happens. I did just replace the rings, valve lifters, rod bearings, and gaskets.
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#8
Old fart with a wrench
TrailerTrash, it's just a hard rubber shoe that holds the chain slack away from the cover. Nothing special.
#9
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Year: 1998
Model: Cherokee(XJ)
Engine: 4.0L
This would have me majorly stumped. Ivd replaced timing sets on Small Block Chevys that were very worn/stretched and the new ones were tight as can be.
#10
Old fart with a wrench
Yeah, sbc's will wear a hole in the side of the timing cover and still run! LOL! Had one with that ****ty nylon covered gear that did that!
#12
Old fart with a wrench
Well the 4.0 uses low pressure valve springs so the load on the chain is not that bad to really stretch it much. A high performance 350 is another story. Like you say though, the steel gearset I replaced it with barely fit.
Last edited by dave1123; 06-18-2020 at 05:07 AM.
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