Howzit Guys
Should i be letting my PJ idle after driving before i switch off ? 3.2 DiD ?
Yes. Best is to take it easy the last few kms before stopping. Idle is a must when you go from "hero to zero"
Yes and no.Desmond wrote:Howzit Guys
Should i be letting my PJ idle after driving before i switch off ? 3.2 DiD ?
If you have been working the engine just before you turn off (e.g. tooling along the highway at 120km/h and then pulling off into a service station) then you should let the engine idle for a minute or so to give the turbo a chance to cool down a bit.
But if you live at the bottom of a hill in a 60km/h zone and tend to idle for the last couple of kms you have already achieved the same thing.
Desmond,
A few things to consider:
1)The turbo spins at a few hundred thousand revs per minute.
2)The turbo spins at those revs in a white hot environment.
3)The turbo bearing is lubricated by engine oil supplied by the engine oil pump.
4)The only cooling the turbo receives is from the fresh air that gets sucked in on the inlet side of the turbo.
The second you turn off the engine, you stop the oil supply and you stop the cool air supply. The general idea is to allow the turbo an opportunity to slow down and to cool down before you deprive it of life giving oil and cool air. This is best achieved by slowing down at the end of your journey. The turbo will immediately start the cooling and slowing process. For instance when coming off the highway for a comfort break, best is to take your foot off the pedal as soon as possible and to give as little pedal after that while looking for the ideal parking spot. All you need do now is to let it idle while the kids look for their shoes and you close the windows and stow your shades. Done… turn off the motor.
On the other hand, if you have just crawled up a steep climb and you worked the car to get there and now you want to stop for a few photies and to wait for your friend in the Landi to catch up, best to let it idle for a minute or so before turning off the motor
A few things to consider:
1)The turbo spins at a few hundred thousand revs per minute.
2)The turbo spins at those revs in a white hot environment.
3)The turbo bearing is lubricated by engine oil supplied by the engine oil pump.
4)The only cooling the turbo receives is from the fresh air that gets sucked in on the inlet side of the turbo.
The second you turn off the engine, you stop the oil supply and you stop the cool air supply. The general idea is to allow the turbo an opportunity to slow down and to cool down before you deprive it of life giving oil and cool air. This is best achieved by slowing down at the end of your journey. The turbo will immediately start the cooling and slowing process. For instance when coming off the highway for a comfort break, best is to take your foot off the pedal as soon as possible and to give as little pedal after that while looking for the ideal parking spot. All you need do now is to let it idle while the kids look for their shoes and you close the windows and stow your shades. Done… turn off the motor.
On the other hand, if you have just crawled up a steep climb and you worked the car to get there and now you want to stop for a few photies and to wait for your friend in the Landi to catch up, best to let it idle for a minute or so before turning off the motor
I don't understand this.RoelfleRoux wrote: On the other hand, if you have just crawled up a steep climb and you worked the car to get there and now you want to stop for a few photies and to wait for your friend in the Landi to catch up, best to let it idle for a minute or so before turning off the motor
How will the Landi catch up when the Pajero is towing it uphill?
Andrew,
I was just making the story up as I was typing... didn't really think it through... good point.
I know.... one of those elastic, kinetic recovery ropes should do the trick.
I was just making the story up as I was typing... didn't really think it through... good point.
I know.... one of those elastic, kinetic recovery ropes should do the trick.
Thanks for the info Guys! Much Appreciated! 
P.s The other day I witnessed a Land Cruiser try tow a Landi out a slipway with a boat attached, a Pajero Gen 3 then pulled all three out! hmmmmmm......hahahahaha! Ouch!
P.s The other day I witnessed a Land Cruiser try tow a Landi out a slipway with a boat attached, a Pajero Gen 3 then pulled all three out! hmmmmmm......hahahahaha! Ouch!
....common tell the truth 
All good advice there, and I've used the slowing down before stopping technique for years, and still have the same turbo after 230 000 km.
just a detail though, there's no white hot condition in the turbo, maybe 700 - 800 C, and that really is hot. And the engine oil's secondary purpose is cooling, especially in the turbo bearing / bush.
just a detail though, there's no white hot condition in the turbo, maybe 700 - 800 C, and that really is hot. And the engine oil's secondary purpose is cooling, especially in the turbo bearing / bush.