93 oil pressure switch

[SV13]

Where is the oil pressure sensor located?  I think it’s infront of the fuel filter in the block on an angle , but not sure if that’s if. 
I put a 93 into my 90 truck and I’m not getting pressure while cranking. 
would like to know if the sensors are the same for 90 and 93 

[SV13]

Ok. Found the sensor. I pulled it and no oil on the tip after many minutes of cranking. Tried cranking with the sensor out and no flow. Any suggestions?

[Tractorman]

What is the history on the '93 engine that you just installed?

 

And I'm not being a wise guy, but has the crankcase been filled with fresh oil?  - have to cover all bases.  Also, while the engine was out of the truck, was the crankcase filled with oil?

 

Maybe a plugged oil suction screen?  A little more history may help.

 

- John

 

 

[SV13]

Thanks for your reply. 
I engine bought the engine from a Cummins Mechanic he went through it 4 years ago , did all the seals and gaskets and set the valves. Oil was fresh 4 years ago and motor hasn’t run since. Engine was said to have low 300km on it. 
also , I now have a leak on the injection pump coming out from the top side of the housing where the throttle shaft goes vertically into the pump. Is there a seal I need to replace? 
 

Paul 

[SV13]

I’m going to try to reverse pressurize the bearings with oil. Done it on other engines on start up. We’ll see what happens. Likely gotta pull the pan. I’m suspicious of condensation on the bottom of the pan after sitting for 4 years and the pick up screen is gunk 

[Tractorman]

I think that is a VE distributor type fuel injection pump, but I can't answer your question about the fuel leak.  I wouldn't be surprised if the seal is replaceable without removing the pump. 

 

As far as  your "no oil pressure" issue, I have read (but have not experienced) that an oil pump that has not operated over a long period of time can be difficult to prime.  Is your engine cranking speed fast?  If not, I would address that first with a healthy battery / batteries and good electrical connections. 

 

You could crank engine with the oil filter removed to see if you are getting any oil.  This may help prime the oil pump, as well.   Just be sure the engine is disabled from starting. 

 

- John

[SV13]

John , thanks for your input. 
I figured out my problem. I decided to hell with it and just start it. I did.  It ran 10 seconds and still no guage pressure, turned it off went out front for more contemplation and saw a gallon of oil on the ground. I left a plug out that’s behind the power steering pump. Plugged the hole hole, all is well. 
going to start a new thread about my pump leak. 

[Tractorman]

Glad to hear all is well...,

 

- John