88 motor help

Schim · May 30, 2013

So if you read the link I attached you will see that have no oil pressure on my fresh build up of my 88. In that link I said I was going to pull the front cover off to make sure the plug for the pressurized oil line was behind the cam gear. Well tore it apart last night and it is indeed in the block... Does anybody else have any idea what could be the cause of my having no oil pressure? I am almost to the point where I think there is a crack inside my block somewhere and all my oil is squirting out and back into the oil pan. But the thing with that is I have consistent oil moving through the motor from top to bottom. Plug in the back of the motor?? I dont have any oil coming out my bell housing. Bounce all your ideas off me. It runs too good to give up. Email me if you want I dont care. There has to be someone that has been down this road before.

1st start no oil pressure

Anonymous-0 · May 30, 2013

Quit guessing! Pull the pan and take an old refrigerant tank and make yourself a leak detector. Hook the detector, put abot 2 quart of oil in the tank. Hook a hose from the tank to the oil gallery like use the port the gauge goes to. Apply 15 psi of air pressure o the tank and look and see where your leak is. You did check your filter base for the restrictor being inplace?

Schim · May 30, 2013

The leak detector is something I will work on this weekend. As I read back to 2004 on this site the oil filter base kept coming up. I have the cast iron one not the aluminum one. I will swap the base from my 77 to my 88 tonight but cannot try it out until i put the front of the motor back together or until I get this leak detector built. Thanks J.

Pittsburgh Tractor · May 30, 2013

Just had this will a new build as well. The problem was actually the pump. Motor would push oil but couldn't build any pressure. The pump seem ok when we put it in, but I disassembled the pan pulled the pumped and compared it to an old spare and big difference. Put in a new pump 60lbs of pressure now. The old pump had worn bushing on the shaft so oil would escape up the shaft and pressure would be lost.

ejr-IA. · May 30, 2013

I missed if it is a diesel or gas.One time I converted a diesel to a gas and up front their was a idler gear that set in a bushing that drove the diesel pump. In that bushing their was a hole that lubed the gear from the oil gallery right side front.In the gas motor that oil passage needs blocked with a plug or a bushing with out the hole,otherwise no oil pressure.Not sure does the engine have oil squirter jets to lube the rods could they be missing?

B A Star · May 30, 2013

   Take John S's advice and check for leakage.  Think about how thin the oil is when it gets to operating temperature.  Most engines have good oil pressure cold and drop off as they get to operating temperature.  We always used 10 wt. oil and mixed it 50/50 with diesel fuel to thin it out like it is at operating temp.  Makes checking for leaks easier, take your time as you have to flush out the thick oil.

Schim · May 30, 2013

That's interesting. It did start life as a diesel block actually. I already plugged the hole where the idler gear sat in. I wonder if what I put in there is enough or if oil is getting passed it.

rp1555 · May 30, 2013

what kind of gauge are you using to check the pressure ? have you screwed low pressure gauges directly to the oil gallys on the block ?

Schim · May 30, 2013

I have an automotive type gauge from O Reillys automotive plumbed into the hole in the oil filter base. 0-50psi I think it is

casecollectorsc · May 30, 2013

Shop that ground a crank for me gave me the wrong bearings. About 12 thousands clearance and only about 12 pounds oil pressure. You could have the wrong bearings also.

88 motor help

Schim

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Anonymous-0

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Schim

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Pittsburgh Tractor

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ejr-IA.

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B A Star

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Schim

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rp1555

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Schim

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casecollectorsc

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