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Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 12:02 am
by dunslair
Any advantage over just sitting in P :?: ..... no pun intended ....honest. :D

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 12:29 am
by The Great Pretender
dandywarhol wrote:I don't see any advantage in idling in D. With the brakes on the only difference between D and N is the front clutch is applied but nothing else is working/turning. In fact, idling in N will probably warm up the oil faster as the torque convertor is running/slipping a little faster.

Sitting in D at the lights does no harm whatsoever
Interesting, I know very little about auto boxes. When stopped in D mine will creep, is this normal for a Bongo?
Also as I live within a minute from the motorway it can take about 6/7 miles before lockup.
Works great when travelling into town from cold as it is going up n down through the gears. The cooling system gets up to temp sooner then to.

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 12:30 am
by The Great Pretender
dunslair wrote:Any advantage over just sitting in P :?: ..... no pun intended ....honest. :D
Keep clear of yellow snow..................... :lol:

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 12:38 am
by kawasaki kid
My Cavalier King Charles Spaniel is very good at making yellow snow. #-o

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 1:08 am
by The Great Pretender
kawasaki kid wrote:My Cavalier King Charles Spaniel is very good at making yellow snow. #-o
Didnt King Charles make blue snow.............? :wink:

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 1:12 am
by kawasaki kid
Not my little begger. :roll:

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 1:14 pm
by dandywarhol
The Great Pretender wrote:
dandywarhol wrote:I don't see any advantage in idling in D. With the brakes on the only difference between D and N is the front clutch is applied but nothing else is working/turning. In fact, idling in N will probably warm up the oil faster as the torque convertor is running/slipping a little faster.

Sitting in D at the lights does no harm whatsoever
Interesting, I know very little about auto boxes. When stopped in D mine will creep, is this normal for a Bongo?
Also as I live within a minute from the motorway it can take about 6/7 miles before lockup.
Works great when travelling into town from cold as it is going up n down through the gears. The cooling system gets up to temp sooner then to.
Sounds just right TGP - some creep is normal from the torque convertor

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 1:17 pm
by dandywarhol
dunslair wrote:Any advantage over just sitting in P :?: ..... no pun intended ....honest. :D
Nope.

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 1:53 pm
by mikeonb4c
dandywarhol wrote:
dunslair wrote:Any advantage over just sitting in P :?: ..... no pun intended ....honest. :D
Nope.
[-X

Yup

Image

:lol: :lol: :lol:

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 3:05 pm
by dandywarhol
mikeonb4c wrote:
dandywarhol wrote:
dunslair wrote:Any advantage over just sitting in P :?: ..... no pun intended ....honest. :D
Nope.
[-X

Yup

Image

:lol: :lol: :lol:
I'll reserve judgement until you're finished your exhaustive trials 8)

Image

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 9:55 pm
by bobngo
supreme being , i think it was king george who peed blue ,not king charles

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Wed Jan 06, 2010 11:56 pm
by madmile
I am no mechanical expert, but have always gone on the basis that sitting at lights etc in D with foot brake applied was never a problem (only tend to use hanbrake for parking or very steep hill starts). But I would never leave an auto idling in D for the purposes of warming up, and certainly not if I wasnt sat in the drivers seat. If it crept fowrard due to handbrake not being 100% on it could cause and accident, or you could accidentally hit the throttle as you get in and even run yourself over :roll: .

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Thu Jan 07, 2010 12:40 am
by The Great Pretender
bobngo wrote:supreme being , i think it was king george who peed blue ,not king charles

Knew that really, was just testing. :oops: :oops: :oops:

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Thu Jan 07, 2010 1:38 pm
by mikeonb4c
madmile wrote:I am no mechanical expert, but have always gone on the basis that sitting at lights etc in D with foot brake applied was never a problem (only tend to use hanbrake for parking or very steep hill starts). But I would never leave an auto idling in D for the purposes of warming up, and certainly not if I wasnt sat in the drivers seat. If it crept fowrard due to handbrake not being 100% on it could cause and accident, or you could accidentally hit the throttle as you get in and even run yourself over :roll: .
I respect that view, and I'm certainly not trying to promote the practice (and this is not my thread of course!). But chocked up, on my drive, with handrake hold checked also before leaving vehicle unattended, with no small children in our house, etc. etc. I think reasonable precaution has been taken and the risk/benefit balance is favourable (much as a circular saw is dangerous but useful, and acceptable as a risk provided a suitable guard is fitted and its not left around near children etc.).

Thinking about it laterally, you could apply a similar case for saying that sitting in 'D' in traffic is a bad practice, as it is too easy to lose concentration and let the car slip into the one in front (and I believe I've read of this happening). The key I think, in each case, is to exercise 'due care and attention'.

Re: 2.5 Auto diesel....idling in "D" for long periods

Posted: Tue Jan 12, 2010 10:50 am
by Alacrity
In my book leaving any automatic vehicle unattended in gear is to be avoided & the advantages gained are questionable. Dandywarhol has explained perfectly the difference between P,N & D. Personally I tend to put my automatics (especially my diesel Bongo as it idles smoother) into N when standing for some time & stick the handbrake on as this avoids irritating other motorists behind with brake lights permamently on - worse at night of course.