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Old 09-01-2005, 15:01   #1 (permalink)
andy
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90 2.5TD Overheating

i have recently had to replace the water pump on my 2.5TD 90, and since
doing so it keeps over heating. i have replaced the thermostat, and as
far as i can tell i have no blocks, when i refiled the system after
pump replacement, i ensured the top hose was undone, and filled until
water ran from the top of the radiator.

i am also getting a great deal of pressure build up on the filler tank,
even when left to go cold, when undone water is forced from the filler.

advise appreciated as always.

thanks in advance,

Andy

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Old 09-01-2005, 16:01   #2 (permalink)
SimonJ
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Re: 90 2.5TD Overheating


"andy" <andy.pseymour@ntlworld.com> wrote in message
news:1125610372.801403.269590@g44g2000cwa.googlegroups.com...
> i have recently had to replace the water pump on my 2.5TD 90, and since
> doing so it keeps over heating. i have replaced the thermostat, and as
> far as i can tell i have no blocks, when i refiled the system after
> pump replacement, i ensured the top hose was undone, and filled until
> water ran from the top of the radiator.
>
> i am also getting a great deal of pressure build up on the filler tank,
> even when left to go cold, when undone water is forced from the filler.
>
> advise appreciated as always.
>

Sounds like head gasket has gone.


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Old 09-02-2005, 00:01   #3 (permalink)
andy
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Re: 90 2.5TD Overheating

would i not get other signs too? like popping from the oil filler cap,
water in the oil etc?

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Old 09-02-2005, 02:01   #4 (permalink)
beamendsltd
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Re: 90 2.5TD Overheating

In message <1125640172.249412.251590@z14g2000cwz.googlegroups.com>
"andy" <andy.pseymour@ntlworld.com> wrote:

> would i not get other signs too? like popping from the oil filler cap,
> water in the oil etc?
>


Not necesserily - a small leak (which it must be, or the water would
all be "punped" out a couple of seconds) between a cylinder and a
water-way does not necessrily give any other evidence. I might be
worth looking at the dip stick for evidence of the oil being a bit
creamy, or for creamy gunge at the top.

Richard

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Old 09-02-2005, 02:01   #5 (permalink)
andy
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Re: 90 2.5TD Overheating

Yes, i have checked the dipstick, and it is the usual quality black, i
could probably do with a change oil, same as that left on peoples
drives when you visit :-)

Andy

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Old 09-02-2005, 05:01   #6 (permalink)
Austin Shackles
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Re: 90 2.5TD Overheating

On or around 1 Sep 2005 14:32:52 -0700, "andy" <andy.pseymour@ntlworld.com>
enlightened us thusly:

>i have recently had to replace the water pump on my 2.5TD 90, and since
>doing so it keeps over heating. i have replaced the thermostat, and as
>far as i can tell i have no blocks, when i refiled the system after
>pump replacement, i ensured the top hose was undone, and filled until
>water ran from the top of the radiator.
>
>i am also getting a great deal of pressure build up on the filler tank,
>even when left to go cold, when undone water is forced from the filler.
>


's not got one of those filler plugs near the top of the engine has it? some
of the engines have - you could have air locks in the head area.
--
Austin Shackles. www.ddol-las.net my opinions are just that
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too much traffic. Avoid the jams by never using your mind on a
Bank Holiday weekend.
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Old 09-04-2005, 16:01   #7 (permalink)
Tom Woods
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Re: 90 2.5TD Overheating

On 2 Sep 2005 01:34:30 -0700, "andy" <andy.pseymour@ntlworld.com>
wrote:

>Yes, i have checked the dipstick, and it is the usual quality black, i
>could probably do with a change oil, same as that left on peoples
>drives when you visit :-)


The head gasket can go without affecting the oil.

My car did this. It was running hot and i had lots of bubbles in the
header tank. The oil was fine. The head was warped in the middle :(

This does sound similar to your problems. Hopefully it is just your
head gasket thoug h - not the whole head!

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Old 09-05-2005, 01:01   #8 (permalink)
andy
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Re: 90 2.5TD Overheating

OK, spent the weekend checking this over. flushed the radiator, found
that the small hose from top or rad to filler tank was blocked and
cleared it and refilled, very slowly ensuring no air blocks, and
yes....... this seems to have fixed the overheating and pressure build
up.......

i now seem to have a problem with my Viscous fan though, there seems to
be no air being pulled through by the fan, and still getting very hot
when cruising (if that is a term you can use with an 1988 2.5 TD
defender) at high (well highish) speed. I put on an old seized viscous
unit, which is definitely pulling air through and temperature staying
at a steady level.

anybody know if it is possible to reg viscous units reconditioned, or
do i have to fork out for a new one??

Andy

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Old 09-05-2005, 15:02   #9 (permalink)
SpamTrapSeeSig
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Re: 90 2.5TD Overheating

In article <1125906869.665852.91960@g43g2000cwa.googlegroups.com>, andy
<andypseymour@gmail.com> writes
>(if that is a term you can use with an 1988 2.5 TD
>defender) at high (well highish) speed.


<awestruck> How do you DO that?

I've managed almost 70 on that M4 hill by the A46 junction, and it
scared the daylights out of me. If I could I'd be delighted with
overheating, but anyway it's about to get cooler round here.

> I put on an old seized viscous
>unit, which is definitely pulling air through and temperature staying
>at a steady level.
>
>anybody know if it is possible to reg viscous units reconditioned, or
>do i have to fork out for a new one??


What does the team think about the cost effectiveness of Kenlowe units,
now Diesel's gone through the roof? Gotta be better value now, Shirley?


Regards,

Simonm.

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Old 09-05-2005, 16:01   #10 (permalink)
Badger
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Re: 90 2.5TD Overheating


"SpamTrapSeeSig" <no-one@nospam.demon.co.uk> wrote in message
news:LxQQsMFjyLHDFw8i@tigger.muircom.demon.co.uk...
> In article <1125906869.665852.91960@g43g2000cwa.googlegroups.com>, andy
> <andypseymour@gmail.com> writes
>>(if that is a term you can use with an 1988 2.5 TD
>>defender) at high (well highish) speed.

>
> <awestruck> How do you DO that?
>
> I've managed almost 70 on that M4 hill by the A46 junction, and it scared
> the daylights out of me. If I could I'd be delighted with overheating, but
> anyway it's about to get cooler round here.
>
>> I put on an old seized viscous
>>unit, which is definitely pulling air through and temperature staying
>>at a steady level.
>>
>>anybody know if it is possible to reg viscous units reconditioned, or
>>do i have to fork out for a new one??

>
> What does the team think about the cost effectiveness of Kenlowe units,
> now Diesel's gone through the roof? Gotta be better value now, Shirley?


Kenlowe fans, or any other electric fans for that matter, are a total waste
of money, IMO. All they do is allow the engine to thermally cycle
continuously, instead of slowly increasing to a point of equilibrium like a
viscous fan would. Oh, and where does the energy for an electric fan come
from anyway? Yep, from the engine (that would otherwise be driving the
viscous) but now we put it through conversion processes (mechanical >
electrical > mechanical) with the re******t energy losses to heat at each
conversion process. They were only a fuel saving if you compared them to an
old, solid driven fan, not a properly working viscous unit!
Badger.


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