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Puma90man



Member Since: 27 Feb 2011
Location: South Africa
Posts: 26
South Africa 2009 Defender 90 Puma 2.4 Fire LE Vesuvius Orange
How long to idle motor before switching off?
I remember in the good old days when turbos still broke every 10 000km we had to wait a couple of seconds before switching off the vehicle to "protect" the turbo. Is there any meaning to this and valid on a Puma machine?

I tried looking through old posts cause I'm sure it was discussed - but I got lazy - sorry Confused
Post #62744 8th Mar 2011 10:21am
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ken



Member Since: 18 Aug 2009
Location: Banging Birds with my bitches !!
Posts: 4328
United Kingdom 
I still give her at least 30 secs after reaching the final destination just old habits
Post #62746 8th Mar 2011 10:28am
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BigMike



Member Since: 13 Jul 2010
Location: Lancashire
Posts: 2253
United Kingdom 
No need to these days, just turn it off.
Post #62751 8th Mar 2011 10:54am
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DefenderOfTheEarth



Member Since: 09 Nov 2010
Location: Cornwall, UK
Posts: 1304
United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Tonga Green
Leave mine for about 10-15 seconds - I think the manual suggests it? Defender 110XS SW gone... now VW California 180 4 Motion.
Post #62757 8th Mar 2011 11:24am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2592
South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
I idle the Audi for about a minute or so.

I always idle the landy until the EGT has come down to 160C. Sometimes it takes 1min, sometimes it takes 4min, depending on how hard you have been driving.

I suggest you get an EMS like the MadMan, it will show you how to drive according to EGT, which will prolong your engine's life. Thumbs Up --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



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Post #62759 8th Mar 2011 11:45am
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Puma90man



Member Since: 27 Feb 2011
Location: South Africa
Posts: 26
South Africa 2009 Defender 90 Puma 2.4 Fire LE Vesuvius Orange
Thanks guys !

I will rather be cautious as I am planning to stick to this vehicle as a toy until death do us part

Need something to work on when I'm 94
Post #62761 8th Mar 2011 11:56am
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Marius



Member Since: 21 Dec 2010
Location: South Africa
Posts: 231
South Africa 2011 Defender 110 Puma 2.4 SW Keswick Green
Reason is if you switch the engine off while the turbo is still spinning you loose oil pressure to the turbo resulting in the bearings running dry.
Post #62766 8th Mar 2011 12:30pm
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Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
Depends on what you've been doing.
My house is on a de-restricted road so I arrive home at highish revs. I always let it tickover for atleast 30 secs.
On the other hand if I've spent a couple of minutes tootling round the supermarket carpark I don't bother to wait.
Post #62769 8th Mar 2011 1:34pm
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BigMike



Member Since: 13 Jul 2010
Location: Lancashire
Posts: 2253
United Kingdom 
Marius wrote:
Reason is if you switch the engine off while the turbo is still spinning you loose oil pressure to the turbo resulting in the bearings running dry.


The oil pressure drop on switch off and the short time the turbo spins does not let the bearings run dry. If it kept spinning for 10 minutes then sure, but it doesnt.
Post #62802 8th Mar 2011 6:38pm
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Laurie



Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897
England 2005 Defender 90 Td5 XS CSW Bonatti Grey
It's mainly to let the turbo cool down.
At high temprature it could vaporise the oil.
Post #62809 8th Mar 2011 7:08pm
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Zagato
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Member Since: 08 Jan 2011
Location: Billingshurst West Sussex
Posts: 4990
United Kingdom 
They said do this ten years ago but I never did on my SAAB, it used to get thrashed and did 177,000 miles on the original turbo. On other cars apparently if it has an inter cooler it is OK to switch straight off after being worked.
Post #62819 8th Mar 2011 8:06pm
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party monkey



Member Since: 31 Dec 2010
Location: Oxon.
Posts: 1311
England 2005 Defender 110 Td5 XS CSW Cairns Blue
Td5 owners manual states 10 secs, otherwise possible damage to turbo through inadequate lubing of the turbo bearings.

Surely simple answer is look it up in your Puma manual and draw your own conclusion from that ?

Just for the record - as no self respecting bloke ever reads any manual.. Whistle . I got SWMBO to look it up on mine Wink .... Maybe a friendly Puma SWMBO can help too ? Wink Jon - 110 td5 [sold]. Currently Defenderless.
Post #62838 8th Mar 2011 9:29pm
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T1G UP



Member Since: 08 Dec 2009
Location: Bath
Posts: 3101
England 2011 Defender 110 Puma 2.4 XS CSW Orkney Grey
usually about 10-30 seconds, i use the time to gather my stuff and put the disklok on.
Post #62847 8th Mar 2011 9:50pm
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puma110



Member Since: 28 Feb 2011
Location: Australia
Posts: 7
2011 Defender 110 Puma 2.4 SW Stornoway Grey
It depends a lot on what the engine has been doing just before you're planning on turning it off. If you've been taking it pretty easy then a short time will be fine. But if you live on a steep driveway and have been giving it a bit to get up or revving hard even for just a shortish period of time then a minute or so minimum is a good idea to get the temperatures back down. It's not all about lube for movement of parts, but more about cooling. Without any lube flow or air flow or rotation the high exhaust temps can overheat bearings and warp bits of metal that aren't meant to be warped.
Post #62880 9th Mar 2011 5:07am
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MartinK



Member Since: 02 Mar 2011
Location: Silverdale (Lancashire/Cumbria Border)
Posts: 2664
United Kingdom 2011 Defender 110 Puma 2.4 USW Orkney Grey
The manual states:
Quote:
"Stopping the engine
• Always allow the engine to idle for 10
seconds before switching off."
Post #62884 9th Mar 2011 8:31am
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