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[Engine] 1.9d DW8 Temperature Related Questions Please.
#1
Good Afternoon,

I have recently decided to give my van a thourough service, not having any service history when I got it. 

56 Plate van. 1.9d DW8, non turbo, no aircon, pas

I have done;
Timing Belt
Auxillary Belt
Water Pump
Oil/Filter
Air Filter
Fuel Filter.

Since I have refilled the coolant (50% mix) the van runs considerably hotter than it did before, prior to me letting loose with the spanners it sat at 80degrees regardless of conditions (open road, traffic) and I don't recall the fan ever kicking in.

Now since I have refilled it (just over 7 litres) it runs at 80degrees on the open road, however sitting in traffic the needle just seems to creep up, it got to 95degrees before I got moving and it cooled down again. When I got home I left it idling and again it went up to 95degrees but the fan didn't kick in before I took it round the block to cool it down.

I've had a nosey through the Haynes book of fibs, and it seems to state the thermostat should be fully open at 99degrees, however it makes no mention of when the fan should kick in. I don't think that there is an airlock as I have run quite a lot of coolant through the bleed valve on the heater matrix and there is no air coming out. I havent opened the block bleed valve (now I know there is one, but thats another story), should I do this?

My questions are;
1. What is expected behaviour of the engine?    I'm guessing just sitting there at 80 degrees?
2. What temperature should the fan kick in?      And would you expect the temperature to rise like that on idling?
3. Is there a way to test the fan operation?        Again the sensor wire on the rad that should be there according to Mr Haynes doesn't exist (or I've misunderstood the location)  

Apologies if this is covered elsewhere, but I couldn't find anything that leapt out at me, I'm not the best with forums and searches. 
If there is something already there that covers this, if someone could point me in that direction I would be grateful.

Thanks in Advance

Andy.
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#2
If it definitely changed during the service then it maybe worth double checking the coolant system has bled ok.

There has been quite a change in air temperature lately, this has two effects of causing engine to get hotter, first is obviously the air cooling effect is less, the second is you don't use your interior heater as high.

Check the fan is working by shorting out the fan switch contacts, if fan is ok I'd change your fan switch, using gut instinct that something is wrong is better than imitating a steam engine on the hard shoulder. They aren't expensive, around £10-£15 at decent motor factors.

I believe the fan switch should come on around 93 degrees for the 1.9D, perhaps it might kick in if you let it get up to say 97 degrees.
Mar 2002 Berlingo Multispace Forte 1.9D 166,000 miles
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#3
Evening,

Many thanks for the reply, apologies for the delay in my reply, been offline for a few days.

I'll give the fan a test when i've got the time. Other than it seeming to run a little hot, its fine.
I opened the bleed valve and forced some more coolant through but no siginificant air bubbles came out.
I left it to up to over 95 the other day and the fan didn't come on. I'll test it properly later and update here.

Cheers

Andy.
Reply
#4
My berlingos 1.9d like this , gets to 100 on gauge before fan fires and cools it down

My pug partner 1.9d never gets above 80 and fan never comes on ... I suspect thermostats stuck. Meh ....
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