I'll be taking everything apart this weekend to put the turbo master on and modify my upper intake so it will probably be a good time to do that too since i have everything off and i can put the t on for the ops and the mechanincal guage. Do you happen to know what thread that is, is it a regular 1/8 pipe thread

 

I put a after market OPS on but its working cause I can hear the pump turn on and off. I just changed the oil filyer again but will have to take it for a spin to gey the oil warmed up . It has oil pressure now but as soon as its warmed up it drops so ill try a ride tomorrow. Bjen take the 2 bolts off the fuel filter bracket so you can move the wieing harness and fule filter cartridge out of the way that will give you enuff room to get at the OPS. You'll need a 27mm socket to get it off.

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And don't be shy bjen to ask for a video, I can whip one up on youtube in a flash right from my phone. Crazy showed me a few things and I poted vids to help out ppl, carazys the brains and I'm the messenger

 

Mrjohndeere remember just because you can here the LP does always mean it working just let you know

you said when engine cold you oil pressure what is it ready then what it go to when it warm up

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oh ya that OPS could be you problem it a after market you want a ACDelco

 

Im 100% sure the pump is working,i tested it by jumping it again. the oil pressure when cold go's to allmost half way on the gauge.Ater acout driveing 5 miles it drop slowly to close to zero and when i pulled over and parked it went to zero.I drove back home,a 35 mile ride and it stayed close to zero all the way.Last nite i changed the oil filter and now ill try it out this morning to see how it go,s.

 

i have say if you drove that far on zero pressure i would have think the would have blown up so going say OPS is on pressure side or filter

 

What do you mean filter, just the regular oil filter you put on, that can make you have low pressure? Or just a wrong reading?

 

What he's saying Bjen is that an oil filter can be faulty,they can collapse inside or just plain be no good and not regester oil pressure.Crazy i changed the oil filter this morning and went for a ride.Yesyerday i actually did 70 miles like this drove to Cochrane 35 miles and drove back with no oil pressure.Ill add this video i made this morning and you can see allmost no oil presssure,a little bit when i floor the truck,heres the video.

 

now is that video after or before changing filter and if after change filter i would get after market gauge on there for test before blow motor up or a turbo

how many miles do have on the truck

 

This is after i changed the oil filter.The truck has 270,000 klm or 167,770 miles not much for these truck as you no. The oil pressure has never really been that great since ive owned it,never really made it to the half way mark on the gauge hot or cold.

 

? for what wgt oil are you using

oil pressure should be around

50 to 60 psi cold idle

20 to 30 psi warm idle

35 to 45 psi driving

maybe oil pumps on it way out

like said early on in post need try replace OPS or get after market gauge on it to see what happens these motors need oil pressure for turbo also