no oil pressure at turbo

jstann · Feb 9, 2014

so i had my new d66 turbo fail on me with in 30 mins of putting it in ... sux ... so im in the middle of trying to figure out why .. i have 0psi at the turbo and thats what made it fail ... i swapped out the lpop with a melling m208 hopping that would solve it ... no.. so i have 40 psi at the hpop and still 0 at the turbo iv pulled the oil cooler and checked the pressure relief valve and its mint but the bypass valve is missing no clue when that happend .. any ideas ? blockage ? the bypass valve ?

Magnum PD · Feb 9, 2014

Is there oil coming from the block oil supply for the turbo

Garbage_Mechanic · Feb 9, 2014

Hard to see with pedestal in truck, but there is a 1/8 pipe recessed allen head plug in the back side of the pedestal I beleive for testing.
Big question.....has the pedestal been modded to remove the EBV cylinder? With pedestal off the truck and turbo off of the ped, there should be a clear path. Blow through it and see. This isnt any secret stuff, good point made earlier on the flow coming from block crank it over w/o pedistal on block, see if there's flow. Could intall pedestal back on engine w/o turbo on it and see what you get out of it too.

Garbage_Mechanic · Feb 9, 2014

Before going any further are you sure the basic engine has oil pressure? People have had problems with priming the Melling pump from time to time.

jstann · Feb 9, 2014

so iv pulled off the oil cooler checked the valves there all good and i have 40 psi at the filter ... i have a gauge at the turbo and it shows 0 and i use the same at the filter ... must be blockage ....
ill be digging into it again tomorrow

the ebpv has been gutted and welded up no blockages there ... must be in the block somewhere

OBS-Addiction97 · Feb 9, 2014

Curious to see the outcome.

Garbage_Mechanic · Feb 10, 2014

the ebpv has been gutted and welded up

Was this done some time ago, or at the same time as the turbo install? If at the same time my money is on the pedestal mod being the problem.

Very curious where this is, not common problem!

jstann · Feb 11, 2014

so i pulled the plug on the back of the pedestal and its showing 20 psi at idle 30 psi at 1300 rpm it was plugged in all night and was quite warm am i in the right ball park ? i really dont wanna wreck another turbo

Magnum PD · Feb 11, 2014

Have you taken the turbo off the pedistal to see if oil comes out of it?

Garbage_Mechanic · Feb 11, 2014

Garbage_Mechanic said:
the ebpv has been gutted and welded up

Was this done some time ago, or at the same time as the turbo install? If at the same time my money is on the pedestal mod being the problem.

Very curious where this is, not common problem!

Not trying to be an ass, but I'm trying to help and you avoided my question. I know the answer is obvious to you since you are living it. The order of events usually help determine the cause (I do this for a living)

So you have established you have oil pressure to the pedistal. Not sure how long you let it run, but with cold oil I would expect higher than normal pressure once stabilized. Now do you have it to the pedistal, do you have it to the turbo itself. I would make a plate that replicates the bottom of the turbo and use it to verify pressure and flow before I let the engine run one second with a new turbo and unknown oiling issues.

jstann · Feb 12, 2014

I wasn't avoiding it slipped my mined wile I was typing ... It was just done but I'm sure there is no blockages in the pedestal .. And the truck was quite warm when j got the 20 psi it was plugged in over night I ran it for 5 min