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Old 12-10-2005, 12:01   #1 (permalink)
DON
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Oil light - any ideas?

Can anyone give me some hints on an oil problem? I have a 1998 Disco
300TDI.

The symptoms are:
- Start up (engine cold), no problem
- after about half hour's drive (engine now reasonably warm) the oil light
comes on a tickover (c700-750 RPM)
- a short while later, I cannot get the oil light to come on at all, so my
friendly local garage (who run a 110 with a 300TDI) think I'm going mad.
- yesterday, we drove for about half an hour at 70mph and when I slowed
down, the oil light came on at about 1100RPM

I've had the car in the garage a couple of times over this, but the mechanic
says that he can't find anything wrong - the engine sounds OK; pressure
readings are OK. He thinks it might be the pressure switch - does this seem
reasonable? It has Shell oil of the correct grade and a new filter (first
step was an oil change).

I'm open to suggestions . . .

Damien





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Old 12-10-2005, 12:01   #2 (permalink)
Derry Argue
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Re: Oil light - any ideas?

"DON" <mail@stoponehills.fsnet.co.uk> wrote in
news:dnf9uk$p1q$1@newsg4.svr.pol.co.uk:

> Can anyone give me some hints on an oil problem? I have a 1998 Disco
> 300TDI.
>
> The symptoms are:
> - Start up (engine cold), no problem
> - after about half hour's drive (engine now reasonably warm) the oil
> light
> comes on a tickover (c700-750 RPM)
> - a short while later, I cannot get the oil light to come on at all,
> so my
> friendly local garage (who run a 110 with a 300TDI) think I'm going
> mad.
> - yesterday, we drove for about half an hour at 70mph and when I
> slowed
> down, the oil light came on at about 1100RPM
>
> I've had the car in the garage a couple of times over this, but the
> mechanic says that he can't find anything wrong - the engine sounds
> OK; pressure readings are OK. He thinks it might be the pressure
> switch - does this seem reasonable? It has Shell oil of the correct
> grade and a new filter (first step was an oil change).
>
> I'm open to suggestions . . .
>
> Damien
>
>
>
>
>
>


Not a Land Rover, but in the dim and distant recesses of my mind I seem
to remember having a similar problem that was solved by replacing the
oil pump. But I'm not a mechanic! On that particular vehicle, it was a
fairly easy job too. I think it might have been a Peugeot 504 -- but
then I don't think it is easy to take the sump off a 504, so....

....and, then again, you say the pressure readings are OK. That's the oil
pressure readings, right??

Derry
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Old 12-10-2005, 14:01   #3 (permalink)
Lee_D
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Re: Oil light - any ideas?

DON <mail@stoponehills.fsnet.co.uk> uttered summat worrerz funny about:
> Can anyone give me some hints on an oil problem? I have a 1998 Disco
> 300TDI.
>
> The symptoms are:
> - Start up (engine cold), no problem
> - after about half hour's drive (engine now reasonably warm) the oil
> light comes on a tickover (c700-750 RPM)
> - a short while later, I cannot get the oil light to come on at all,
> so my friendly local garage (who run a 110 with a 300TDI) think I'm
> going mad. - yesterday, we drove for about half an hour at 70mph and
> when I slowed down, the oil light came on at about 1100RPM
>
> I've had the car in the garage a couple of times over this, but the
> mechanic says that he can't find anything wrong - the engine sounds
> OK; pressure readings are OK. He thinks it might be the pressure
> switch - does this seem reasonable? It has Shell oil of the correct
> grade and a new filter (first step was an oil change).
>
> I'm open to suggestions . . .
>
> Damien


If the pressures are right then replace the switch. For what it costs not
worth doing anything else till that has been swapped.

Lee D


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Old 12-10-2005, 14:01   #4 (permalink)
EMB
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Re: Oil light - any ideas?

DON wrote:

>
> I've had the car in the garage a couple of times over this, but the mechanic
> says that he can't find anything wrong - the engine sounds OK; pressure
> readings are OK. He thinks it might be the pressure switch - does this seem
> reasonable?


It's the first thing I'd replace in that situation


--
EMB
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Old 12-10-2005, 14:01   #5 (permalink)
Davey
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Re: Oil light - any ideas?

Yeah, twas the pressure switch on mine.

"EMB" <embtwo@gmail.com> wrote in message
news:dnfhdd$bhg$1@lust.ihug.co.nz...
> DON wrote:
>
>>
>> I've had the car in the garage a couple of times over this, but the
>> mechanic says that he can't find anything wrong - the engine sounds OK;
>> pressure readings are OK. He thinks it might be the pressure switch -
>> does this seem reasonable?

>
> It's the first thing I'd replace in that situation
>
>
> --
> EMB



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Old 12-10-2005, 14:01   #6 (permalink)
DON
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Re: Oil light - any ideas?

Well, thanks for those replies - the father in law was convinced that it
'had to be' bearings. I accept that it still may be, but the combined
evidence of the mechanic who fiddles with the car (and lots of other local
Land Rovers) and this group has left me with a little more comfort.

Damien


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Old 12-11-2005, 12:01   #7 (permalink)
Marc Draper
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Re: Oil light - any ideas?

In message <dnf9uk$p1q$1@newsg4.svr.pol.co.uk>, DON
<mail@stoponehills.fsnet.co.uk> writes
>Can anyone give me some hints on an oil problem? I have a 1998 Disco
>300TDI.



I have only ever replaced oil pressure switches on 1998 300 tdi engines.
They must have had a bad lot at the factory.
--
Marc Draper
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Old 12-11-2005, 13:01   #8 (permalink)
Austin Shackles
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Re: Oil light - any ideas?

On or around Sun, 11 Dec 2005 19:17:39 +0000, Marc Draper
<marc@mdeng.demon.co.uk> enlightened us thusly:

>In message <dnf9uk$p1q$1@newsg4.svr.pol.co.uk>, DON
><mail@stoponehills.fsnet.co.uk> writes
>>Can anyone give me some hints on an oil problem? I have a 1998 Disco
>>300TDI.

>
>
>I have only ever replaced oil pressure switches on 1998 300 tdi engines.
>They must have had a bad lot at the factory.


hmmm. summat to think about. We were contemplating hunting a low-mileage
late TDi to replace the current one, in due course.

on which subject, sort of...

what are the TD5s like to work on for the average bod without testbook and
so forth?
--
Austin Shackles. www.ddol-las.net my opinions are just that
Blue: The sky is blue for a reason. Blue light is a source of strength
and harmony in the cosmos. Create a blue light in your life by
telephoning the police
from the Little Book of Complete B***ocks by Alistair Beaton.
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Old 12-11-2005, 15:01   #9 (permalink)
Marc Draper
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Re: Oil light - any ideas?

In message <g84pp1t1nm3f9unkvhg7g07046vmcfcek3@4ax.com>, Austin Shackles
<austinNOSPAM@ddol-las.net> writes


>
>what are the TD5s like to work on for the average bod without testbook and
>so forth?



I have got full diagnostics for Td5 and sometimes you still have to
guess !!!!!

That said I don't seem to be having to "open" td5 engines as often as I
do 300 td's.
--
Marc Draper
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Old 12-12-2005, 00:01   #10 (permalink)
Austin Shackles
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Re: Oil light - any ideas?

On or around Sun, 11 Dec 2005 22:28:48 +0000, Marc Draper
<marc@mdeng.demon.co.uk> enlightened us thusly:

>In message <g84pp1t1nm3f9unkvhg7g07046vmcfcek3@4ax.com>, Austin Shackles
><austinNOSPAM@ddol-las.net> writes
>
>
>>
>>what are the TD5s like to work on for the average bod without testbook and
>>so forth?

>
>
>I have got full diagnostics for Td5 and sometimes you still have to
>guess !!!!!
>
>That said I don't seem to be having to "open" td5 engines as often as I
>do 300 td's.


an earlyish TD5 is another option, in looking for a more-recent disco. When
did they retune the TD5 for more low-end grunt? ISTR the originals being
rather useless off-idle.

--
Austin Shackles. www.ddol-las.net my opinions are just that
"Festina Lente" (Hasten slowly) Suetonius (c.70-c.140) Augustus, 25
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