05 Grizz 660 engine noise - Yamaha Grizzly ATV Forum
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post #1 of 2 Old 04-13-2010, 09:09 PM Thread Starter
 
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05 Grizz 660 engine noise

Hey guys, I'm new to this site but it looks like a great one!
I have an 05 grizzly 660 that started to have a problem with coolant getting into the crankcase. I tore it down expecting to find a head gasket problem, but instead found a bad mechanical seal on the water pump. I replaced it and all the gaskets and put it all back together. Now I have a noise in the engine. I know the timing is right, I've checked the valve clearances, eliminated any rattles from heat shields etc, but I still can't find the noise. It really sounds like a valve clearance noise but they're set properly. Any ideas???
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post #2 of 2 Old 04-13-2010, 09:49 PM
 
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I'd pull the belt and clutch off and start it up and check for the noise. Sometimes the clutch can make unusual noises for a while after you reassemble them.

09 Griz 700(815cc) - Black, 25in Buzzsaws/30in Zillas, Uni filter, 47mm bored throttle body, custom machined primary, 1.5mm shim, 18g greaseless overdrive weights, Fox Podium Shocks, Modified RDC 2in lift, Warn RT25, 2in snorkels

06 Kodiak 450 - Green, stock rhino tires, uni, modded stock exhaust, machined clutch, 1mm shim, 500rpm wet springs and 4-660 weights

06 YFZ 450 - White, Uni, pro flo intake, hmf pipe, ITP holeshots, 36 tooth rear sprocket
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