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Farmall & IHC Tractors Discussion Forum

Re: Is M oil pump same as 450 diesel?

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11-17-2019 11:17:41

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M diesel yes, M no. oil pressure lines should be flowing more than a drip. I would put a good pressure gauge at the block (adapt as needed) to get the full story. I assume you are looking at the oil pressure in the hood opening, and not the pressure on the fuel injection pump. Jim

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11-17-2019 13:03:22

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 Re: Is M oil pump same as 450 diesel? in reply to Janicholson, 11-17-2019 11:17:41  
Yes the engine oil pressure at the dash. I also have a problem with compression leaking into coolant and prably antifreeze leaking in cyl. #1. I just put new head gasket on. Is it possible head could be cracked? I tested with valves closed. I plan on buying a inspection camera I hopefully can fit thru injection hole.

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11-17-2019 14:11:21

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 Re: Is M oil pump same as 450 diesel? in reply to jhncp, 11-17-2019 13:03:22  
Machining the head requires setting valve recession so the clearance and compression are maintained. They do crack if not shut down after idling on diesel far 5 min if worked hard, or at least 3 if warm. (no matter what others say) and then shutting off, leaving in diesel mode. The head oil passage is at the very front of the block on the right side of the front of the head. Jim

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11-19-2019 09:33:04

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 Re: Is M oil pump same as 450 diesel? in reply to Janicholson, 11-17-2019 14:11:21  
I assume you mean the gas side of the head? How big is this plug and can u test pressure there as well? Also what are the 4 pipe plugs for near the bottom of head on diesel side? Of course I couldnt get one out so I drill it out and noticed I drilled into a brass piece behind pipe plug.

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11-21-2019 16:16:17

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 Re: Is M oil pump same as 450 diesel? in reply to jhncp, 11-19-2019 09:33:04  
Not an external port, but the passage from block to head for valve train oil. They can leak there and make a mess. Jim

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