Question about 2002 Volvo S60
Your Volvo does not have have a problem at all. The feature is what is known as a 'turbo timer' and is an important part of most turbocharged vehicles such as yours.
Your volvo is powered by a 5 cyclinder 2.4 liter engine that is turbocharged. Which means the engine works on the principle of 'forced induction' whcih helps it make more power.
A turbo like yours has a small impellor placed in the early section of the exhaust which is then spun up by heated and expanding exhaust vapors. this power is then transferred back to a 'charger or pump that actually forces additional air into the engine resulting in the ability to burn a more powerful mixture of air to fuel. Unlike your engine which even under very aggressive driving will only sustain forces at most approachign 9 thousand rpm, a turbo charger often spins with speeds in the tens or even hundreds of thousands of revolutions per minute. because of this they depend on a steady stream of engine oil to both lubricate and saturate the very rapidly spinning parts to keep them cool.
when the engine is suddenly shut off after a long or spirited drive the oil pump also stops, this could result in overheating and damage to the turbo.
As a result of this, Volvo was one of the fisrt companies to install a 'turbo timer' mechanism in its T models which as you noticed will continue to operate the fan for a pre calculated amount of time after you shut the car off in order to properly cool down the turbo.
Again your car has no problem whatsoever, this is a good thing and a nice feature to have whcih will definably lend itself to extending the overall life of your engine over time.
Posted on Apr 03, 2011
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Posted on Jan 02, 2017
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