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

  1. 18th February 2011, 10:16 PM #1
    Grizzly_Adams's Avatar
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    Question 300tdi oil lamp on at under 1k rpm

    Hiya folks,

    Currently on a trip, stopped overnight in Dalby, Qld.

    On the way up a strange thing started happening - my oil light started coming on when the engine was under 1000rpm's...

    Any idea's what may be causing this?

    300tdi Defender...
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  2. 18th February 2011, 10:36 PM #2
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    400HPONGAS
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    Just screw the idle up to the light just goes out . When you get back from your trip then fit a descent capillary oil guage and see wgats going on , there could be 101 different reasons .
    Does this only happen when the engine is warmed up ?
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  3. 18th February 2011, 10:38 PM #3
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    Hot day Oil thinning out ?? whens the last time you gave it a oil change
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  4. 18th February 2011, 10:46 PM #4
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    Quote Originally Posted by 400HPONGAS View Post
    Just screw the idle up to the light just goes out . When you get back from your trip then fit a descent capillary oil guage and see wgats going on , there could be 101 different reasons .
    Does this only happen when the engine is warmed up ?
    Ditto.

    Not much you can do while on a trip.

    BTW, what year and VIN is the Tdi ?
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  5. 19th February 2011, 06:53 AM #5
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    One simple thing you can do while on a trip is fit a new oil pressure switch. They are pretty cheap.

    That is probably the cheapest, simplest and most common cause of the oil light coming on.

    1973 Series III LWB 1983 - 2006
    1998 300 Tdi Defender Trayback 2006 - often fitted with a Trayon slide-on camper.
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  6. 19th February 2011, 07:32 AM #6
    2stroke Guest
    I actually put a gauge on mine years ago (prefer that to a clock) and then noticed it was slow to get pressure after sitting for a week or more. Also when hot pressure is noticeably lower (Penrite 15w50 semi synth). Last time I did the timing belt I gave her a new pump rotor set and pressure relief slug and spring. The slow oil thing was caused by a score in the pump housing (back of timing case) which I fixed with metal poxy. When is it due for a timing belt?
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  7. 19th February 2011, 01:40 PM #7
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    Quote Originally Posted by 2stroke View Post
    I actually put a gauge on mine years ago (prefer that to a clock) and then noticed it was slow to get pressure after sitting for a week or more. Also when hot pressure is noticeably lower (Penrite 15w50 semi synth). Last time I did the timing belt I gave her a new pump rotor set and pressure relief slug and spring. The slow oil thing was caused by a score in the pump housing (back of timing case) which I fixed with metal poxy. When is it due for a timing belt?
    Yep, I installed a real pressure gauge when my light started to flicker but I won't report what I found or what the fix was until Grizzly has finished his trip
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  8. 19th February 2011, 02:56 PM #8
    slug_burner
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    Quote Originally Posted by rick130 View Post
    Yep, I installed a real pressure gauge when my light started to flicker but I won't report what I found or what the fix was until Grizzly has finished his trip
    Bad news doesn't get any better with age!
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  9. 20th February 2011, 01:06 AM #9
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    Perhaps he should take an oil sample have it analysed , and see how much copper , white metal is in it , maybe the Fe ppm as well .
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  10. 20th February 2011, 04:32 PM #10
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    Well the thing is I don't actually have a timing belt - I have the Zeus gears fitted and they've been there for over 100'000km's.

    I guess I'll add the oil pressure gauge into the list as the light tells me nothing ...

    As fOr the question before about vin - I'll answer that when I get home
    but she was built in July '94 (she was one of the first of the 300tdi's)

    With any luck I'll be home in a few hours - just about to leave Toowoomba now...
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