Goodbye Yaris - Hello Auris

[aur1s]

My new Auris Diesel 2.0 seems to lack some of the power of the demo model and there are some 'engine' diesel noises which I didn’t notice before on a test ride.

I’m putting these down to it being so new - any thoughts?

Kind regards

Aur1s

[Auris 1.6 vvt-i]

The demo one has been broken-in and yours is brand new. Once you brake it in, you'll feel it gets "more juice" ;)

[Johan007]

Yeah you may get a few rattles from the dash at low speeds. Drives me crazy.

The break squeak does disappear after a while.

Not sure about the performance maybe cars need bedding in like a new front door. Once it is out of warranty just get it chipped.

[aur1s]

The demo one has been broken-in and yours is brand new. Once you brake it in, you'll feel it gets "more juice" ;)

Thanks - and I was told by a friend that after 5K miles they settle down and it keeps it like that to 80K miles so long as they are service regularly - we will see?

Is there anything special to start the diesel? I press the clutch and turn the key - don't seem to have to wait for the diesel 'coil' light to go off - it just starts.

When I drive off it sounds pretty harsh until I have cleared 2000 revs and then it's fine even dropping back a bit it's still OK.

The manual suggests running the diesel on a bit before stopping e.g. 20 seconds+ if you have been previously doing 50+ - is that the norm with diesels to protect the turbo?

So:

1. Do I have to wait for the 'coil' light or does it only start when it's ready?

2. Is it a good idea to run it for 20+ seconds before turning off?

Kind regards

Aur1s

[Speed_Chaser]

Hello Aur1s, and welcome on TOC! (Did I say that allready? Can't remember)

Don't know about the light, as I've never had a diesel car, only petrol!

But I've heard that it's good to keep the car running for a while if your car has turbo

Best regards, Alex

[Auris 1.6 vvt-i]

So:

1. Do I have to wait for the 'coil' light or does it only start when it's ready?

2. Is it a good idea to run it for 20+ seconds before turning off?

Kind regards

Aur1s

Hi aur1s,

The answer to both ?s is yes :)

1. It's a good idea to wait for the light to go out as this means that the glow plugs have done its job, heating the cylinders and preparing the engine to start.

2. It's also a good idea to let the car idle for while - if you have pushed it a little too harsh (let's say you wanted to see what it has under the hood), you could even let it idle longer (1 or 2 mins) so the turbo can cool off, otherwise you are decreasing its life dramatically! When you rev up the engine, the turbo is doing some serious rpm's and producing heat. Let some oil run through it, chilling it out before you turn it off.

Regards,

Svet

[OldSkoO1]

Hi

No need to wait after turning on. If you turn on then put your seatbelt on thats enough time for the pumps to prime and oil circulating etc.

It is a good idea to idle for about 15-30secs after journeys at around 50mph or above. I always do.

Modern cars are actually pretty good at dealing with hot turbo's, the fans, cooling systems and oil is still being pumped on most cars a few minutes after shut off if the temperature sensors detect heat is too high.

The heat inside a turbo is extreme. When you just turn off, the oil can coke as it just cooks inside the turbo. When coking occurs hard black deposits form inside the turbo due to thermal breakdown due to the heat. This can block and cause bearing failures which will cause turbo failure. Well thats what used to happen.

These days even the oil is virtually, probably resistant to coking. So you shouldn't encounter any problems. And as i said, the pumps and cooling systems still run after switch off if they are needed. The warning is there because as we all know toyota think of every angle and protect against wear and tear to improve reliability.

BMW work their turbo's hard, they use similar oils but they have had unusually high number of turbo failures. The fact they they are using modern oils doesn't mean the oil technology alone will prevent failure. Idle cooling is still important.

In general, its sensible to give it at least 15 seconds and drive gently for the last mile or 2.

After a hard thrashing i always leave mine for at least 1 minute.

I read a report on buses / lorries that were benched and idle cool down significantly reduced to likelyhood of turbo failure.

BMW turbos are reported to fail as soon as 80k miles, some 50k. Normally you wouldn't expect a failure even with bad treatment or poor cooling for at least 120k miles. More like 200k.

[aur1s]

After a hard thrashing i always leave mine for at least 1 minute.

Yes - I do like a hard thrashing too :)

I have tried waiting for the diesel light to go out and the result is clear - the initial clatter isn't there anymore when starting from cold.

I mentioned this to a diesel friend and he explained that a common rail diesel will start immediately down to about zero centigrade but that it's best to let the glow plugs do their stuff. They shut off automatically so waiting too long won't cause them to burn out prematurely.

More importantly the glow plugs may take 30+ seconds to start glowing if you don't wait for the light to go out e.g. immediately start and the mixture during this time can be very rich because the engine timing is retarded. All this is avoided if you wait for the light to go out - longer if it's very cold?

Also the manufacturer doesn't force the time wait because it may prevent the vehicle starting - it's just one more thing to go wrong - and the very high currents drawn can cause the Battery voltage to drop and funny things can happen like the engine management even forgets that the car is being started.

Kind regards

Aur1s

[Q.S.]

"cooling systems and oil is still being pumped on most cars a few minutes after shut off if the temperature sensors detect heat is too high."

Just jumped accross here from the Avensis forum, would be interested to know, how do they do this then? Are they fitting cars with electric water pumps and oil pumps these days? Every one I've seen runs them from the engine, engine stops - pumps stop.

[Beretta]

If anyone is worried about the cool down period after a spirited run, they could always fit a turbo timer, problem solved.

[VIP2006]

I .have ta Auris 1.4 Diesel semi-auto does this car have a turbo? If it has I was not informed in my introduction to the car by the salesman that a cool down period was required after a period of above 50mph speed had been done. Please excuse my ignorance in all things about car technology.

[VIP2006]

I have a Auris 1.4 Diesel semi-auto does this car have a turbo? If it has I was not informed in my introduction to the car by the salesman that a cool down period was required after a period of above 50mph speed had been done. Please excuse my ignorance in all things about car technology.

[aur1s]

Auris 1.4 Diesel semi-auto does this car have a turbo?

Yes - 1.4 has variable geometry turbocharger with intercooler.

My manual lists (p105) - Idling time before engine stop (diesel engine): 0 mph @ city driving, 20 secs @ 50 mph, 60 @ 63 mph, 120 @60+ mph

Kind regards

Aur1s