Motor is noisy. Sounds like a value train, upper end at high idle. At higher speeds it sounds like lower end. Everything appears ok in the upper end. No metal in the pan. Have already replaced the timing chain. Any ideas?
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unlikely -- unless it is a diesel engine ( engine type not mentioned)
check for faulty hydraulic lifter or worn rocker bushes or shaft
have a compression test done to check for loose valve seat insert.
In order to achieve different speeds for the fan motor, there is a bank of resistors that reduce the voltage depending on what speed is selected. This is basicaly the same design for all cars on the road. The fail mode causes the full voltage to bypass the resistor bank so the fan runs at high speed (maybe even higher than your normal high setting). On most newer vehicles, including your '02 T&C, to help keep the resistors cool, they are mounted to a heatsink and then that assembly is mounted in a hole in the A/C ductwork just below or behind the glovebox. My '02 T&C has the 3 zone auto temp control and it had a fancier resistor block, but the function is the same. You should be able to get the cheaper one for <$25 at a parts store.
sounds like an auxillary device like alternator, power steering pump, water pump, etc. check all your fluids. pay special attention to your alternator, i have heard this before and it ended up being an alternator