Turbo timer?

[4bye4]

I have read that in some peoples opinion, that oil in the intercooler and dirty MAF may be caused by crankcase breathing into the intake when the motor is switched off when hot. Would fitting an aftermarket turbo timer have any impact on this? They are available either as plug in units or build kits from ebay or Jacar.

[rkinsey]

You will still have the same thing happen after the turbo timer is installed as the engine will still be hot well after the turbo timer shuts down the engine.

The turbo timer is designed to run the engine at idle so that coolant and oil is still pumped through the turbo housing to cool it down after it has been running for a while. This is to reduce stress and fatigue in the metal when it gets very hot.

Cheers,

Rob

[the evil twin]

The vast majority of aftermarket Turbo timers are illegal in how they operate and usually a bit of a PIA after the novelty wears off.
Yes, I had one on my CRD and personally I wouldn't bother having one again.
99% of the time you use the o'ride button anyway.

A small amount of oil condensate in the intercooler is no biggee IMHO.
It will continue through the intake as soon as you warm up next time.
I would suggest that the post turbo air at high boost is pretty darn hot.

A significant amount of MAF contamination is cause by turbo surge so I doubt if using a Turbo Timer to cool the engine would alter the contamination level very much.
I also can't see anyone sitting there for several minutes every time you want to shutdown.
You are no longer waiting for the Turbo to cool, now you are waiting for the engine to cool.

Bottom line is that it won't hurt anything but will it be of any measurable effect in reducing MAF contamination?
Personally I doubt it.

[threedogs]

fit an EGT gauge when you reach your destination, idle away while packing up your papers, wallet and phone
Your EGTs will only lower so much idling, then turn off your engine.
Turbo timers did account for heaps of stolen 4x4 at one stage.
I would not feel comfortable walking away from my Patrol while its still Idling away

[the evil twin]

Totally agree with what you say TD.
If the Feds see you walk away it is a contribution straight away esp in Qld so the guys reckon.

What makes it an even longer process tho is now it isn't the Turbo that is being protected but engine temp if the purpose is to reduce the engine breathing.
That will take maybe what, 4 or 5 times longer?

[4bye4]

Thans TD and ET. Just wondering thats all. Interesting about the Feds. I have had cars with turbo timers on befrore and it shows a lack of understanding of the cops if they throw a fine for that. If it is a proper TT it will not allow the car to be stolen, I guess that is what they are on about. When TT is going the car is on idle and will stop after the set time even if you attempt to drive it. Cops should be able to see that the doors are locked and the keys are not in the ignition? Anyway not going to do it so doesn't matter I guess.

[nissannewby]

The legality is leaving a running vehicle unattended which can and has been dangerous. Most of the better quality ones have a park brake circuit in them which by law is suppose to be connected as then if the park brake is not applied then the timer doesn't operate and the vehicle will shut down as soon as the key is turned.

Also agree with the above statements that it will not effect the maf

[4bye4]

Thanks for the info guys.
Below is a quote I chopped from the Chaz Yellowstone page on the web which is why I asked the question in the first place.
"Along with this, MAF sensors are known to give faulty input voltages to the ECU if they become contaminated or insulated against the cool induction air passing through them. I believe this is a result of shutting down a hot engine, where some oily fumes can travel up to the MAF sensor and contaminate it with oil against the normal direction of air flow."
Reading what you guys have said makes more sense to me though.