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Omega Help Area => Omega General Help => Topic started by: Vulpine on 17 October 2009, 16:54:43

Title: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 17 October 2009, 16:54:43
HI All
Anyone know the process/location/etc to replace the stat on the 2.5td (circa 1997)?
cheers
Jon
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 17 October 2009, 18:45:13
oh and where can you buy them from!! :P
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 17 October 2009, 20:11:53
sure posted a number of times, but:

viscous off
top end of bottom hose off
3 bolts hold housing on, remove
stat sits in housing

Most factors sell.

(TIS says coolant transfer rail has to come off, but I never have
Title: Re: Diesel 2.5TD thermostat replacement
Post by: ferrari jason on 17 October 2009, 20:57:54
Just a quick one i managed to do mine without removing the viscous fan just remember the rubber o ring i left mine out first time DOH !!!!
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Turk on 17 October 2009, 21:05:28
Quote
sure posted a number of times, but:

viscous off
top end of bottom hose off
3 bolts hold housing on, remove
stat sits in housing

Most factors sell.

(TIS says coolant transfer rail has to come off, but I never have

Nor me. A bit more of a fiddle, but nothing major.  :y
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Elite Pete on 17 October 2009, 22:18:06
Viscous fan is a left hand thread ;)
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 17 October 2009, 22:45:49
hi
couldn't find a prev post so started a new one. sorry
thanks for all the help. now found it and does look ok and simple. cheers all
no need to remove viscous fan in my case anyway, as i run without one, but now temperature is up and down like a pair of pants so suspect a sticky thermostat.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 19 October 2009, 10:30:47
also, what antifreeze type does the 2.5td req?
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Seth on 19 October 2009, 12:16:29
Best to use the genuine Vx red stuff at 50% strength.
Capacity is 10 litres, so pour in the whole 5 litre container's worth.
You'll need to drain the system completely. There's a tapered bolt on the offside of the cylinder block, just aft of the turbo.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 20 October 2009, 23:31:38
does this VX red stuff blend with PartCo's std stuff?
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Seth on 22 October 2009, 09:51:24
Quote
does this VX red stuff blend with PartCo's std stuff?
As you'll need to purchase a 5 litre container from Vx, it'll be best to do a complete (block and rad) drain anyway.
If you can't find the block drain-bolt, 'PM' me your email address, and I'll forward a drawing.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 22 October 2009, 10:04:06
on TD, drain plug on bottom of rad (bright red) and in block, drivers side, behind turbo
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 22 October 2009, 21:30:18
ah
thanks for all that
but i will not change all teh coolant, no need, its been done at the last service ;)
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 23 October 2009, 16:44:54
Quote
ah
thanks for all that
but i will not change all teh coolant, no need, its been done at the last service ;)
If you're pulling out the stat, you will lose virtually all of it, so no harm in doing a complete job - consider the previous coolant change a bit of a flush ;)

Antifreeze is dirt cheap anyway...
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 24 October 2009, 11:21:20
true. I will pop down to NOT halfrauds and get some.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: tunnie on 24 October 2009, 11:50:44
Quote
on TD, drain plug on bottom of rad (bright red) and in block, drivers side, behind turbo

And be prepared to get wet
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Agemo on 24 October 2009, 19:46:09
I am a bit suspect with brittle plastic drain valves, I usually Chicken out & remove bottom hose.   :-/
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 28 October 2009, 18:22:10
(http://i988.photobucket.com/albums/af9/vulpine9/Dsc02450m.jpg)
left arrow = thermostat below here
right arrow = new electric thermoswitch for electric fan
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 28 October 2009, 20:57:49
wtf is that rather great tube?  somebody has been playing ;D
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 29 October 2009, 07:04:41
lol yes. the horrid plastic thing split so i replaced it with something with a bit more flow! Oh and ditched the EGR valve.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Seth on 29 October 2009, 11:00:45
Quote
wtf is that rather great tube?  somebody has been playing ;D
Aye, but looks a neat jobbie nonetheless!
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 29 October 2009, 18:48:13
i think its plastic to help prevent engine from heating intake air too much ;)
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Pitchfork on 29 October 2009, 19:02:30
One fashioned from wood would look nice! :D
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 29 October 2009, 19:03:29
Quote
One fashioned from wood would look nice! :D
what, like a nice bit of mahogony?
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Pitchfork on 29 October 2009, 19:06:09
Quote
Quote
One fashioned from wood would look nice! :D
what, like a nice bit of mahogony?
No, something local like Oak, Beech or Ash
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Vulpine on 29 October 2009, 22:44:55
hmmmm
that's a good point. maybe i will cover it with exhaust wrap.
or re-make it out of polystyrene  :P
Title: Re: Diesel 2.5TD thermostat replacement
Post by: Agemo on 29 October 2009, 23:11:19
Given the location, I don't think it will get hot, anyway, it would be a shame to cover it up.
I would Brasso it! It would look good in Brass actually - or Copper!
Sorry - getting carried away.
Title: Re: Diesel 2.5TD thermostat replacement
Post by: TheBoy on 30 October 2009, 08:54:32
Quote
hmmmm
that's a good point. maybe i will cover it with exhaust wrap.
or re-make it out of polystyrene  :P
Wonder if trying to do something with the natural airflow could cool it - in effect a larger intercooler  :-/