Thread: 300tdi oil lamp on at under 1k rpm

I should've looked at your sig

The VIN question was that JC has noticed that about a six month run at the end of '98 appeared to have dodgy big ends.
They tend to delaminate/stress fracture/fail and mostly it leads to crank failure.

Mine fell into this age group, the shells are posted up on a thread here somewhere, luckily the crank on mine was OK.
Oil analysis told the story, as did the big end rattle at high revs on the over-run (never under load, strangely enough)
I probably shouldn't mention that I drove it for two years like that
Eventually the oil light started to flicker at hot idle so I installed a mechanical pressure gauge and that really told the story.

Earlier models just appear to wear their big ends out by about 300,000km.
Re-shell and off you go again.

I'm not aware of the 300Tdi having the cam bearing issue that some 200Tdi's had.

Hopefully it's just a faulty pressure sensor, but a big end job isn't very hard and a oil pump pressure relief valve spring is advisable at the same time.

Hey,

I had a similar problem and after trying 2 new oil pressure switches, I changed the black connector that connects the switch to the loom and problem solved. I think that oil was messing with the connection causing the light to come on.

I hope to fit a calibrated gauge at some point, just havnt got round to it.

H