Engine problem VW T25 1.6 TD??

[asksteve]

I have a loss of oil pressure to my 1985 camper?. I've Checked oil pump, 2 oil switches, pressure relief valve in oil pump, big end shells. The oil pressure drops from 20 psi on idle to 0 after only running for a minute. Been a mechanic for 40 years but I'm stumped. Help?? Any websites could be helpful too.

 

[olic]

firstly you say it drops to zero on idol, does that mean if you blip the throttle the oil pressure gauge will start to register, also when the gauge indicates nothing is the oil pressure light coming on, personally i think the best thing to do is get rid of the crappy electric oil pressure gauge, remove the oil pressure sender and fit a capilery oil sensor and gauge

 

[alvarz]

i think the oil is hanging up somewhere and not draining down to the sump fast enough to recycle.

 

[JG]

Sorry, I'm not too familiar with the engine - there isn't a restrictor in the oilway feeding the camshaft gallery by any chance? They can become dislodged & you'll lose pressure there. Try removing the oil filler cap & see if there's over enthusiastic oil spray there.