Diesels in the Winter
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Discussion

junglie

Original Poster:

2,051 posts

247 months

Saturday 31st July 2010
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Have short listed the 2 x cars I wish to buy next which will be from the 04 - 07 vintage. One, or potentially both, will be diesel and having never run a diesel personally I wanted to float a question here.

My petrol cars have not given me the slightest bother when the weather gets cold but do modern diesels have issues starting from cold during the -14C cold snaps we had?

I am basing my thoughts on cars that have been regularly serviced with injectors, glow plugs wtc in proper order.

MondeoMan1981

2,458 posts

213 months

Saturday 31st July 2010
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In Janaury here in Scotland we were frozen solid as a country for weeks and there were only a few days the glowplugs even had to come on.

Car starts 1st time, everytime, barely turns over before it starts.

Should add I only got the car in January, its a 2002 vintage common rail turbo diesel.

Edited by MondeoMan1981 on Saturday 31st July 14:52

Ry_B

2,256 posts

231 months

Saturday 31st July 2010
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Modern diesels will have no real troubles, it's just the really old ones that had the problems

slipstream 1985

13,765 posts

209 months

Saturday 31st July 2010
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-17 one morning and the car took a few more turns to get going but other than that perfect all winter,

maniac0796

1,292 posts

196 months

Saturday 31st July 2010
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Just let the glow plugs do their work.

You're gonna have more trouble from a badly maintained battery then from a diesel engine.

Balmoral Green

42,561 posts

278 months

Saturday 31st July 2010
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The longer warm up time before the heater can get the cabin all warm and toasty is probably going to be a bigger issue than the starting and running of the engine. They do take a bloody age! Our Panda is warm by the end of the road, I am almost at work by the time the Furby has warmed up.

parapaul

2,828 posts

228 months

Saturday 31st July 2010
quotequote all
+1 to all the above posts.

Also to add that the additives in diesel change by season, so there will be a lot more anti-waxing agents over the winter too.

junglie

Original Poster:

2,051 posts

247 months

Saturday 31st July 2010
quotequote all
Looking at a VW Passat Estate and a BMW 530d Saloon with an A4 3.0 Tdi as a second option.

uuf361

3,168 posts

252 months

Saturday 31st July 2010
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From my experience the VAG170 diesel never started first time from cold when the temp was below freezing - very disappointing and nothing the dealer could find wrong with it.......the VAG 105 I had though had no issues at all.

Stitch

933 posts

247 months

Saturday 31st July 2010
quotequote all
Ry_B said:
Modern diesels will have no real troubles, it's just the really old ones that had the problems
It isn't the engine but the fuel that used to be a problem.

Diesel will wax up at low temps but additives put in now address that problem.

nottyash

4,671 posts

225 months

Saturday 31st July 2010
quotequote all
Totally agree with Stitch.
Modern diesel for sale in the UK should be up to the job.
The problem was diesel waxing in cold temps, and when that happens your fooked!

eastlmark

1,656 posts

237 months

Saturday 31st July 2010
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brings back memories of truckdrivers lighting fires under their tanks to get the Diesel flowing.........

DennisTheMenace

15,605 posts

298 months

Saturday 31st July 2010
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the additives in modern diesel means it should give you any issues and most manufactures programme the glow plugs to preheat when you zap the car with your remote locking . On all Fords now they have an electric PTC heater built in , so even though the engine takes a while to warm up the cabin is nice and warm within 3-5 mins.

Ozzie Osmond

21,189 posts

276 months

Saturday 31st July 2010
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Forget the age of the car. Fact is diesel fuel is blended by the fuel companies to suit the climate when and where it's sold.

http://www-accept.shell.com/static/nz-en/downloads...

Turkey

382 posts

214 months

Saturday 31st July 2010
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My relatively old skool MG ZS Diesel took less than 2 seconds to start when it was below minus 10. If we were in Canada or Alaska then it might be something to worry about, but even then I think it's the fuel and glow plugs that make the difference.

A decent battery helps, I managed to make mine last from one winter to another on a dying battery, as the weather warmed up and the car started until the next winter came. As soon as we got below 5 degrees it failed to start the car twice in one week, so it was time for a new battery.

Direct injection or common rail engines should have no real problems starting in -10 to -15 temperatures, if the battery is okay and the engine and fuel system is sound, even if a glow plug or two is dead.

The biggest problem is getting heat inside the car when it's really cold, in my experience.

Superhoop

4,913 posts

223 months

Saturday 31st July 2010
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Modern diesels don't suffer the problems that were experienced circa 20 + years ago

That said, I did hear of a few isolated in indents of non starting diesels at the beginning of the year due to diesel waxing - in fairness, they were in the far reaches of Scotland where it got down to -25 degrees C

Not a fault with the cars as such, more to do with the fuel supplied by the fuel companies, which is only designed to be safe down to -15 or so - in their defence -25 in the UK isn't exactly normal

uk_vette

3,336 posts

234 months

Saturday 31st July 2010
quotequote all
Does this answer your question ?




As said early on, my 2005 diesel land Cruiser engine is running within say a second of turning the starting motor.

'vette

Deva Link

26,934 posts

275 months

Saturday 31st July 2010
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Turkey said:
The biggest problem is getting heat inside the car when it's really cold, in my experience.
Most (all?) modern diesels have electric booster heaters that work on the engine coolant or sometimes (like MB A & B Class) on the heater itself.

Snag with these systems is they take so much power they tend to be arranged so they only work when the car is on the move, and diesels are *very* slow to warm up if left to idle.

cpl_payne

576 posts

213 months

Sunday 1st August 2010
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The reason diesels cars are slow to warm up when idling is the same reason you buy diesels in the first place - diesel engines have high thermal efficiency i.e. more of energy produced by burning fuel is converted into motion and less is wasted as heat.


Dontlift

9,396 posts

288 months

Sunday 1st August 2010
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No trouble from my 3.0TD Hilux