Why does it take so long for a diesel engine to get warmed up, it take 15 mins for heat to get into the car?.

Because a diesel is pretty thermally efficient. If you want it warm, you'll need to get the turbo working so rev it to 4k and it'll be warm in no time

Chris

The trouble in the morning because I drive down hill for about 4 miles and no chance to really test the turbo ( but I do get a reading of105mpg on the trip computer on a quiet day ) much better on the way home.

Yeah, its a tough one really. The engine needs load to get it warm, but by pushing too hard when cold you could damage the engine... :(

I love heated seats!!!

My 2004 1.9sdi Saloon warms up almost straight away,after two minutes warm air is coming through,more so with air con on.

I've been thinking about this recently. The vRS takes about 20 years to warm up in weather like this and so I was curious about engine wear. You have to work the turbo to warm it up, but surely with cold oil that's a bad idea?

So, is it preferable to ride the torque and keep the revs down or rev it a bit?

Using the PD shove when the engine is stone cold just doesn't feel right to me.....

But isn't the whole point of multigrade oil that it performs at low temperatures as well as hot?

Chris

I won't push my turbo until my oil gets to 50 C at least. I will just have to shiver for a few minutes, but sooner that than fooook something up in my engine. Some turbo exercise is fine but I'd never use more than 50% throttle until the oil had some warmth in it (and often the temp is on 90 before the oil reaches the temp)

4k your mad man lol

just shiver for a bit, mine doesnt take too long to warm up and i dont take it about 2 untill its warm.

if you want to warm it up quickly, revving it to 4k isnt the answer, this isnt putting load on the turbo, just stress, find a long uphill section and hold the car at 2.5k this is much better than revving its nuts off, thats the proper way to load your car

if you have no hills, then its tough just shiver for a bit lol

Yeah, multigrade oils are supposed to be good at both cold and hot temps but they're still not as good when they're cold and they do take time to circulate properly. The PD engine is a rough old thing too when it's cold which doesn't inspire confidence to push it too hard till it's warmed up a bit.

Mine's about 6 miles in on the M62 before I feel I can start giving it some beans.

if you want to warm it up quickly, revving it to 4k isnt the answer, this isnt putting load on the turbo, just stress, find a long uphill section and hold the car at 2.5k this is much better than revving its nuts off, thats the proper way to load your car

The faster the turbo spins the hotter it gets. The faster the engine turns over the hotter it gets. If you wanna hold it at 2.5k for ages then fair play to you, but I like being warm

Chris

but I like being warm

Chris

NEW CAR HEATER & FAN PLUGS INTO DASHBOARD 12V VAN BOAT& - eBay Touring Travel, Car Accessories, Cars, Parts Vehicles (end time 29-Sep-07 19:05:00 BST)

Because a diesel is pretty thermally efficient. If you want it warm, you'll need to get the turbo working so rev it to 4k and it'll be warm in no time

Chris

Because its a big fat iron block old fashioned diesel engine.

Why does it take so long for a diesel engine to get warmed up, it take 15 mins for heat to get into the car?.

Trust me, the 130PD in a Fabia warms up quick compared to a 110TDI in an A3.

NEW CAR HEATER & FAN PLUGS INTO DASHBOARD 12V VAN BOAT& - eBay Touring Travel, Car Accessories, Cars, Parts Vehicles (end time 29-Sep-07 19:05:00 BST)

Naah !

If you're going to do it, do it properly !

See this thread:

Bring on The Cold & Frosty Mornings !

Kenlowe + heated seats = bliss !

If it's a bit nippy,you could always put on a jumper,or a coat.

Ye gods,it's still September...the cold weather hasn't started yet.

I once heard that 70% of engine damage takes place in the first ten minutes of a cold start, so i won't rev it too hard until it's well warmed up.

Heated seats rule!

It's a modern engine with modern oil in it. Have it properly serviced. Drive it 'sensibly' and it'll last for ages - consistently drive it with your foot on the floor and it'll wear out more quickly.

Most people will just get in their car and drive it. Most cars are OK so don't worry too much.

Might change a little if your turbo's the size of a jet engine of course

I once heard that 70% of engine damage takes place in the first ten minutes of a cold start, so i won't rev it too hard until it's well warmed up.

Arguably, that should read "engine wear" rather than "engine damage". And it's more likely the first 10 seconds are more important again...

With a modern car running on UL or lower sulphur UL, the engine should outlast the car, providing it actually contains some oil and the oil is changed fairly regularly.

To respond to the OP about warm-up times.

Diesel engines are heavy lumps of cast iron and the extra mass must be heated.

Diesel is more efficient and burns at a lower temperature than petrol.

Diesel engines on light load tend to run very lean fuel/air mixtures and are unthrottled so there's a) more air to cool things down and less fuel per bang in the cylinder to warm things up.

J.

Its actually not that modern an engine,

Heavy and only 8 valves. It does have a variable vane turbo and the PD fuel pumps. its them that make the difference.

I think the new 2.0PDI is lighter as its alloy and 16valve.

The faster the turbo spins the hotter it gets. The faster the engine turns over the hotter it gets. If you wanna hold it at 2.5k for ages then fair play to you, but I like being warm

Chris

the faster it spins while the oils cold, the more wear you put on the bearings