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jonnytatt



Member Since: 04 Jun 2015
Location: Oldham
Posts: 37
United Kingdom 1988 Defender 90 300 Tdi SW Nato Green
300tdi oil pressure
Since before I can remember my 300 oil pressure light stays on when I first fire her up for a second or 2 . I've looked into it and got mixed reviews some saying their's do others dont. Question is what could cause it.
Post #459251 30th Sep 2015 1:00pm
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Browny90



Member Since: 20 Jul 2015
Location: Derbyshire
Posts: 183
United Kingdom 2004 Defender 90 200 Tdi SW Stornoway Grey
Replace or clean the switch, doesn't cost much, easy job and will rule it out.
have the oil pressure checked with an independent test kit. (I have one if you're around Derbyshire).

meet up with someone with a 300 and have a look at theirs.

or just ignore it Smile Thumbs Up My 1986 90 is currently on a full rebuild, with new chassis, Paint etc.. Very much a hybrid, TD5 Chassis, tub & bulkhead with a 200TDI and LT77 GB Painted in Stornoway Grey Smile 2 years off the road, but getting close to completion now
Post #459262 30th Sep 2015 1:25pm
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jonnytatt



Member Since: 04 Jun 2015
Location: Oldham
Posts: 37
United Kingdom 1988 Defender 90 300 Tdi SW Nato Green
Haha, I'm sometimes in Derbyshire but not enough i'll ask around locally. I'll give it a clean I suppose that's free. I've just been to frightened to disturb it and make it worse
Post #459264 30th Sep 2015 1:30pm
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Interlet



Member Since: 10 Oct 2011
Location: Norwich
Posts: 461
United Kingdom 1998 Defender 110 300 Tdi HT Alpine White
What oil has it got in it, and was it done recently? And how long has this been happening?

If it's a thinner type of oil, it will do that until it builds up a bit. If it's only two seconds I wouldn't worry about it. Mine did that once for a couple of weeks after an oil change, and then eventually was fine. I have an oil pressure gauge fitted permanently, only a rough reading, but sadly wasn't fitted when I had that happen Rolling Eyes

Does it go out straight away if you gently rev it to a few hundred above idle? 1998 110 300Tdi White Hard Top
Post #459316 30th Sep 2015 4:33pm
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jonnytatt



Member Since: 04 Jun 2015
Location: Oldham
Posts: 37
United Kingdom 1988 Defender 90 300 Tdi SW Nato Green
It's 10/40's semi syn.
It's happened for well over a year maybe longer.
I've not tried that you mean start her up with slight pressure on pedal.
Are you thinking my idle could be too low as I've often thought this myself. It used to creap off on the clutch great now the revs dip off nearly but I do have a truck fix organic clutch in .
Post #459457 1st Oct 2015 8:00am
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Fatboy Slim



Member Since: 04 Feb 2008
Location: Bridgend
Posts: 1006
Wales 
Had that problem with 10/40 oil. Run all my Tdis on 15/40 and never had a problem
Post #460272 4th Oct 2015 9:53am
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