Merc HP 500 Oil Thermostat
09-12-2005, 02:12 AM
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Merc HP 500 Oil Thermostat
I'm running Merc HP 500 remote oil filter blocks and stock thermostats (220*). Oil temp in one motor is running hot over 4200 R.P.M.
Oil pressure at hot idle is also significantly higher than the unaffected engine. I think I might have an oil thermostat stuck in closed or partially open position, bypassing the cooler.
I haven't had opportunity to feel the cooler to see if it is getting warm, but just wondering ...
I know oil pressure is generally lower when hot, but would bypassing the oil cooler cause oil pressure to be higher at idle?
Can I pull the oil thermostat out and run without it to diagnose or see if it corrects the problem?
Oil pressure at hot idle is also significantly higher than the unaffected engine. I think I might have an oil thermostat stuck in closed or partially open position, bypassing the cooler.
I haven't had opportunity to feel the cooler to see if it is getting warm, but just wondering ...
I know oil pressure is generally lower when hot, but would bypassing the oil cooler cause oil pressure to be higher at idle?
Can I pull the oil thermostat out and run without it to diagnose or see if it corrects the problem?
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