Idling a Diesel engine on cold start

A 45psi oil gallery pressure takes seconds to get all the way to the top of the engine. Can you imagine the noise and wear if it didnt?!

So basically it takes x number of seconds for oil to be pumped through all orifices of the engine. X being dependent on the engine oil, oil temperature, pump specs and engine specs.
 
Adblue is purely an NOx reduction system rather than the DPF cleaning the usual diesel fluid offers. To make that pretty obvious its injected into the exhaust downstream of the DOC and DPF before it enters the SCR (Selective Catalyst Reduction). There is a NoX sensor downstream so the dosing is continually monitored so as the reports on NOx and diesel pollution being way higher than the test cycle suggest you might end up going through adblue (urea) a bit quicker than the manufacturer suggests.

Get ready for it on most EU6 diesels post Sept15 and unless the engine are very good (mazda 6 SkyActive) it drives a bigger material and hence retail cost between petrol and diesel cars.
 
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Adblue is purely an NOx reduction system rather than the DPF cleaning the usual diesel fluid offers. To make that pretty obvious its injected into the exhaust downstream of the DOC and DPF before it enters the SCR (Selective Catalyst Reduction).

Yeah first thing I noticed was, that's not for DPF!
 
Even if you aren't worried by the additional wear that can occur from extended cold running:

1) It's illegal to leave a car unattended with the engine running.
2) If left unlocked and a thief takes it (increasingly common in winter), you insurance is very unlikely to cover you.

It is not illegal to leave a car unattended with the engine running.
 


Maybe, but how many police officers are you going to get circulating a street at 7am looking for unattended cars warming up.

Im sure they have got bigger crimes to fight

That said, it does do my head in when people start their car at 5 or 6am in the morning, and leave them running for 10 mins

I just usually start, leave idle for 10-15 seconds whilst I put seatbelt on and get bag in car etc, maybe more if the windows are de-icing, and then drive, no point in sitting around for 10-15 mins, the quicker you get the engine temp up the better
 
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Would advise to give this a clean once a year if you can

Pffft. I've had the C-Max going on a few years now and I have never bothered cleaning the EGR valve. Nor made any dedicated attempt to clean the DPF. Just let the glow plugs warm up before starting and then drive it like you stole it. Does the job.
 
Pffft. I've had the C-Max going on a few years now and I have never bothered cleaning the EGR valve. Nor made any dedicated attempt to clean the DPF. Just let the glow plugs warm up before starting and then drive it like you stole it. Does the job.

Im not saying that you need to clean it every year, but im probably going to. Helped with my MPG, and I do the above anyway but then again I like tinkering with stuff and now I know its clean.
 
I dread to think what mine looks like. Probably the same as my arteries as I'm a heavy smoker!! :D

I posted mine in another thread



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Nasty :p

Id imagine thats not been cleaned since some time though, if ever.
 
Maybe, but how many police officers are you going to get circulating a street at 7am looking for unattended cars warming up.

None probably, but plenty of scummers looking for an easy target, a friends other half had their Insignia taken off the drive whilst the keys were in it 2 winters ago. The insurance weren't interested in paying out either.
 
It sounds like the wrong car was bought for the job. Diesels take longer to warm up than petrols and this kind of usage profile is not what they're best for, and what they'll be the most reliable at doing.

I'm in my car and gone straight away in my diesel focus, providing my windows aren't iced up, but then a switch of a button and my windscreen is nice and clear:cool:
 
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