Although I am not a certified mechanic....hell or even a mechanic , I would say no unless the timing chain is in the way of the gasket replacement, you should be able to on most motors replace header gaskets without the removal of the timing chain. ( timing chains are usually involved with the cam/rod repair and or replacement and such)
yes you have to change the pan gasket when doing the timing chain
Timing chain cover gasket
A Dodge Durango does not have a timing belt. It has timing chain. If the timing cover chain gasket is leaking it is normal to change it while changing the water pump.
No, timing chain doesn't need replacing.
I need diagram on changing the timing chain
no you do not have to change the timing chain when changing the water pump.
No
Removal of the timing chain cover, timing chain, and head are needed
Your timing chain may be worn to the point it is jumping a tooth and thus changing the timing. If you can hear the chain that is a good sign it is worn. I would inspect the timing chain.
Timing chain is usually replaced at 200K.
It is not necessary to change timing gears when changing a timing chain unless they have become worn. You won't know if this is the case until you get the cover off and inspect them. It is necessary to change any chain tensioners when you change your timing chain.
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