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I must say this is odd that you are hearing a clicking noise when the engine is cold. I would at this point do the oil change you are due. I would also check the cooling fan and make sure it is not rubbing on the fan shroud or hitting a screw. You should be able to spin it by hand and listen for any noises. When the engine heats up the fan should spin faster and the noise might only be heard when the fan is on a slower speed. I would also inspect the belt make sure it is in good condition. The last thing I would do is pull the engine access cover and inspect the exhaust manifold, make sure the manifold is not cracked and the gaskets are not leaking, normally you will have a build up of soot if a gasket is leaking, normally a bad or cracked manifold will make a noise when you put the coach in drive, it will be louder... IF none of these things seem to be the cause I would get to a cummins coach care so they can troubleshoot some more, also inspect your exhaust piping and hangers.... Hope this helps..

 

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Expert:	RV help for u
Pos. Feedback:	98.7 %
Accepts:	1817
Answered:	11/2/2009

RV Mechanic

10 Years RV experience... Cummins North West, Country Coach, Monaco Coach, Vendor certs.