new 300tdi,no oil pressure

[Lone Rangie]

My problem is my new i.e.fully rebuilt 300tdi.Today i tried to start it & as a precaution ithought i would connect a mech. oil pressure guage and turn it over until the pressure came up before putting the fuel in.Well no pressure despite turning it over for maybe 8-10 times of about 15 sec duration.I spoke to the diesel mechanic who said to start it as it probably needs more speed than the starter can provide to draw the oil up initially.He said it would be ok to run it for up to thirty secs. without any damage & if still no pressure shut it off.I was wondering if i pumped oil down the turbo feed whether this would help being higher than the pump.He also said it is a good idea to put grease in the oil pump rotors during assembly to assist the priming.That will be helpfull for next time.Hope somebody can help as i have no had this problem before.THX Paul:(

[big guy]

Paul
I had all my fingers crossed for you today.
Sorry I can't help you but a call or trip down to the Diesel mechanic at Lonsdale sounds on the cards.

Good luck

[400HPONGAS]

Pull the oil pressure switch off , connect up big syringe of engine oil and inject while cranking and pressure prime it .make sure your filter is primed as best you can .Soon as it pushes back , stop and refit switch .Usually , round the crank type gerotor pumps , self prime , even putting a bit of air pressure down the oil filler can do the Job . If that dont work , its entire timing case off and sump ,!!

[Lone Rangie]

Pull the oil pressure switch off , connect up big syringe of engine oil and inject while cranking and pressure prime it .make sure your filter is primed as best you can .Soon as it pushes back , stop and refit switch .Usually , round the crank type gerotor pumps , self prime , even putting a bit of air pressure down the oil filler can do the Job . If that dont work , its entire timing case off and sump ,!!
Thx 4 help.What i did was to disconnect upper oil cooling pipe at rad then proceed as u suggested.Got pressure now,35psi on the starter motor.That was a relief.Paul

[jboot51]

I helped rick79 with the install of his fresh from the machine shop 300 tdi today.

Same issue of no oil pressure.
A few tense moments until rick found this thread.



Forced oil down the top oil cooler hose until it came out the turbo feed hose.
Connected the hoses back up.
A few more cranks on the starter and bingo, we got oil pressure.

AULRO to the rescue again.

[Scouse]

I did exactly (apart from the turbo bit) the same thing to my 'new' 1990 RR which had sat idle for a few years before coming into my hands.

[Pacemaker]

.He also said it is a good idea to put grease in the oil pump rotors during assembly to assist the priming.That will be helpfull for next time.Hope somebody can help as i have no had this problem before.THX Paul:([/QUOTE]

I think he is referring to using petroleum jelly or vaseline. I wouldnt use grease in the oil pump.

Good thing you got it going now though. Saves pulling the cover and sump off.

Cheers
Michael.