Letting the turbo cool down?.

Axle,

How many of these turbo's are hot enough to need run-down after crawling around town then idling into the car-park.

Lotsa differing info/views on this topic??

I fitted a Bogaard turbo timer to the Patrol only to find that I can't leave the car idling by itself and cooling as the Cobra car alarm will not activate until the motor has stopped running. If you leave it with the stock standard Nissan imobiliser, not a worry. Fit an alarm to protect all your gear and you'll be staying with the car until the turbo has cooled anyway.

Mick.

I believe most insurance companies, well the ones I have spoken to, you void your insurance if you have timer fitted, I believe its in case some joy ridder jumps in and drives off. Of course the thing will stop but with the possibility of damage by a crash with another vehicle or damage by thief jumping out and leaving the the vehicle rolling off down the road..

I know when I had a Turbo Timer I got caught a few times turning the rig off then thinking I forgot something, drive out my other driveway onto the highway and the vehicle dies....not fun

Just more things to go wrong, I have done 550000ks in my last 2 turbo patrols and no problems.. My opinion only.. Michael

The EGT gauge is a bonus for idling down. You can be sure it has cooled before turning off; this time can vary according to the conditions. I'd choose the gauge over the timer.

With a fleet of heavy vehicles fitted with turbos I only have a timer on vehicles over 9litres, and it's 1min idle down around town and light haul, 2min when 25t to 38ton.
I have turbos that have done over 650 k and over 1 mill.
No timers fitted.
The last thing I'd put on a vehicle traveling in remote areas is a turbo timer. As stated above just more to go wrong.
It's not the cooling of the turbo before shut down, its the hot turbo still spinning with no oil pressure that will cause the damage.
Some people (not all) fit a turbo timer but will start their vehicle and drive, before the engine oil is heated and at the right viscosity to properly lubricate the turbo bearings in the first place. Why bother with a timer. When the damage can be done at the start of the trip not the end.

Not so much personal choice - most people are doing what the manufacturer recommends.

Mine says no idling time required for normal city driving; 20secs for 80kph; 1 minute for 100kph and 2 minutes for >100kph.

We recently bought our first diesel, a Mazda BT50, it is not fitted with an idle down timer. When I asked the Mazda people was this procedure necessary their answer was that generally speaking "no"
However, if towing a heavy load such as a van, & you stopped at a roadside rest stop after hwy speed, it wouldn't hurt to let it idle a bit, but didn't consider it necessary.
If going to a van park in a built up area his thoughts were that the slower travel speed in getting to the park was more than sufficient, if in fact needed at all in the first place. Hope this helps.