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  #1  
Old 06-27-2012, 03:02 PM
threecman threecman is offline
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Default M18 low oil pressure

Hi, low oil pressure light stays on in my 1862 with Kohler M18 after start up. Oil level is correct. After riding for 20 min the light went off. Next start up - the same problem, but it took longer for the light to go off and the engine started to slow dow due to overheating. I am using SAE30 and NAPA's gold filter (cross-referenced to the Kohler's original).

I took the closure plate off, inspected bypass valve, oil pump, blowed the air through oil passages - everything looks good. Ordered the new bypass valve just in case. I will also intall OEM oil filter and try using 10W30.

Any ideas what could be wrong? Could it be the non-OEM filter?
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Old 06-27-2012, 04:11 PM
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Sam Mac Sam Mac is offline
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You better put a gage on it and see what you have for pressure. If you ran it for 20 mins with low oil pressure it's probably hurt.
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Old 06-27-2012, 05:59 PM
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Matt G. Matt G. is offline
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10W30 in the summer will not increase your oil pressure.

If I were you I'd be tearing that engine down to see what is going on before it throws a rod. If it slowed down from lack of lubrication, the rods and possibly the mains are shot. Any more running at this point and the only thing you can do is make it worse.
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Old 06-28-2012, 02:25 PM
threecman threecman is offline
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Thank you very much for the advice. I am stil waiting for a back-ordered releief valve. I will put the closure plate back and run it briefly to check the pressure. When I got the tractor with the house 2 years ago it had 800 hrs on it. It now has 850and was running ok until this season.
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