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I'm curious... How does the dealer or other mechanic check the timing chain on our 3.6l engines without having to tear the engine down? Is it done using computer diagnostics or is there a way to access part of the chain to measure slack and such?
 

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you know, thats a very good question.
Obviously, once its bad, it sets the CEL as its exceeded a certain amount.


But im sure they can use the computers to determine the value that is being read from the sensors.
 

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I also think they can sort of deduce that it is stretched if they see codes that indicate intermittent misfiring across all cylinders, and I think there are also codes that indicate that the cylinder spark timing had been retarded at some point.
 

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i took my vehicle to 2 separate shops. neither for sure could 100 percent tell me that it was the timing chains. some said it could be my cam sensors.
the car was running great and didnt rough idle or anything.
i then bought timing set and head gasket kit.
i got the timing chains and sprockets fixed for 500 cash from a retired mechanic.
at same time i got the valve seals fixed as it would smoke when i would start it up. that was a few hundred dollars extra.
in my case the chains were bad. the chain guides had bad wear on them.
all together i paid under 1000 for parts and all.
i replaced the water pump as well while he was already there.
these 3.6 engines are terrible for sludge so do those oil changes on time.
 
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