They allow the engine to run for a selected period after the ignition is switched off.
This popular unit is a must for any turbo diesel 4WD ie factory or after market.
They allow the engine to run for a selected period after the ignition is switched off. This allows for the turbocharger unit to cool down to a suitable temperature before switch off. This prolongs the life of the turbocharger bearings and seals. It is particularly important when towing, where the engine has been on boost up a long hill and a stop is required for fuel or a break.
What is a Turbocharger?
Why Turbochargers Need Protection
How to Protect your Turbocharger
Turbo engine manufacturers recommend that, after a brisk run, their engines be idled for a few minutes to allow the Turbocharger to slow down, cool and normalise while maintaining a flow of fresh engine oil to its bearings. This routine, if followed at every switch-off, will extend Turbo life and significantly reduce the likelihood of premature Turbocharger failure.
Automatic Turbo Protection
The most popular and foolproof method of guaranteeing that the engine manufacturer’s recommendation is carried out every time you switch off is to fit a Bogaard Turbo Timer. Many thousands are fitted to all types of vehicles; cars, 4WD's, trucks, even tractors & lawnmowers. Bogaard Turbo Timers are inexpensive, foolproof & fail-safe. They are easy to fit, with plug-in models for most popular vehicles.
Owners Manual Extract
Watercooling of turbochargers does not remove the need to idle down. The following is an extract from the Owner’s Manual for a car with a water cooled Turbocharger produced by one of Australia’s biggest manufacturers:
"It is essential to maintain a clean supply of oil flowing through the Turbocharger system as a sudden interruption of oil supply may cause a malfunction to the Turbocharger. Therefore, if the engine has been operating at high load or high RPM for an extended period of time, let it idle for a few minutes prior to shutdown."