2.8 JTD Slow Warm Up

[Jean-luc]

The temperature on my 2005 2.8 JTD seems to take forever to reach 'normal', usually about 10 to 15 minutes or 8 to 10 kms depending on traffic conditions and speed.
Is this unusual for that engine, I've only become conscious of it since seeing my Volvo S40 reach 'normal' in a matter of a few minutes and a couple of kms

 

[jockaneezer]

Not familiar with the model, but maybe the thermostat's a bit sluggish, cheap and easy change to find out.

 

[Peter JohnsCross MH]

Possibly the thermostat is stuck open, way to test it is to take it out and see if it is open when cold as it should be closed until the water reaches operating temperature

Peter

 

[pappajohn]

Diesels are notoriously slow to warm up in winter.
i would accept 10 to 15 minutes driving at normal speeds to attain normal temperature.
even after that time your radiator will still be cool to touch.

My Volvo V70 warmed up quick but i think its more the position of the sender rather than actual water temperature in general.

 

[Badknee]

Mines slow too, not checked but in this cold weather I'm not too worried because the hot coolant in the engine will bring it up to temp quicker than whooshing coolish coolant round it.

Edit; that was difficult to type, must get these dentures sorted

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[pappajohn]

My chrysler diesel is slow to heat up, but it should have 3 x heater elements in the air vent distribution box totalling 1kw to preheat the warm air vents in winter for cabin comfort.

I say 'should' as i pulled the 3 x 50amp fuses to take some load off the alternator on short runs especially with the twin element seat heaters turned on.....leather is bloody cold at low temperatures.

 

[mike mcglynn]

Hi, Jean Luc I have same engine and mine is the same it takes an age to get up to working temp.

 

[Nirvanauk]

It seems normal. Both of our diesels take about 10 minutes or so to warm up. It's much better in summer.

 

[JockandRita]

Hi Jean-Luc,

Our 99 2.8 TDI takes a while to warm up too, ie, about 8 to 10 miles before reaching normal operating temperature, especially in winter conditions.

Cheers,

Jock.

 

[Scout]

mines the same, and once its gets to "normal" stays still all the time ( so far)

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[Stephen & Jeannie]

Mine takes 6 miles !!!!

 

[Badknee]

leather is bloody cold at low temperatures.

I have only had one car with leather, I had it for six months and got rid, freezing cold seats in winter as you say and burning hot in summer.

 

[Jean-luc]

Thanks for all the replies.
As has been said it's just probably the fact that diesels are slow to warm up. I don't know why I have only recently become conscious of the slow warm up considering I have had the vehicle since 2005, maybe it's just the contrast with the S40.
Just to be sure of the thermostat I'll probably get it changed as part of the timing belt / water-pump replacement job due in 2015.

 

[JockandRita]

Just to be sure of the thermostat I'll probably get it changed as part of the timing belt / water-pump replacement job due in 2015.

Good idea Jean-Luc.

Cheers,

Jock.

 

[Portland]

Hi Jean Luc, No problem with the warm up, thermostats these day don't stick open if they go kaput they stay shut! and you would have the opposite problem. what's more they are not easy on a 2.8 JTD so I would stick to the old adage of if its not broken don't mend it. Happy new year

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[DBK]

Diesels are slow to warm up because of two factors, better thermal efficiency compared to a petrol engine, meaning less waste heat, and secondly diesel engines tend to be big lumps so more mass to warm up.

 

[Daifuse]

Mine is also very slow to warm up. When I had it serviced last, I specifically asked for the fitter to check the thermostat et al. Absolutely nothing wrong so I've just learnt to live with it. Looks as though they're all the same from the comments on this thread.
.

 

[Judge Mental]

yes more efficient hence the slow warm up...

 

[pappajohn]

Thanks for all the replies.
As has been said it's just probably the fact that diesels are slow to warm up. I don't know why I have only recently become conscious of the slow warm up considering I have had the vehicle since 2005, maybe it's just the contrast with the S40.
Just to be sure of the thermostat I'll probably get it changed as part of the timing belt / water-pump replacement job due in 2015.

At this time of year if the stat is stuck open it will never warm up as cooled water will circulate constantly and the cool water will keep the engine block cooler than it should be.

The stat will normally open just enough to keep the engine temp within limits.....if the coolant gets warm (engine under load) the stat opens more and allows more water to pass through the radiator which of course cools the water.
at low speeds and light loads the stat closes somewhat to maintain correct coolant temp within the engine.

 

[petrol tin glyn]

yes mine is slow 20/30 mins

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[Funnymunny]

Having had mine since new in 2004 it has always taken a good 5 miles in winter to get to normal working temp and once there just stops there so I would say it is quite normal

 

[DM14742]

My 2001 is the same, crap heater too which compounds it. Great engine shame about the 5th gear problem!

 

[longdog]

My old 2.8jtd was always slow to warm up, in the summer but especially in the winter. I was told that this was a common issue. I was going to change the thermostat but was advised not to bother.