Dude!

My hat is off to you for thinking outside the box!

...but what says your system is going to be more reliable than the Ovlov system, which is elegant and simple?.... the original system simply needs a cleaning and a new T-stat once a decade. :-)

This system is universally hated on the BrickBoard because we always find the T-stat stuck in the hot position on a new-to-us 240. Why do we expect these to last 20 years?

Also, remember: the hot air induction system is not only a warm up device. It doesn't know that the engine is warm. In the dead of winter, it stays open part way bringing warmer (less dense) air into the engine. Less dense air needs less fuel.

I think I'm just jealous that you're thinking about Volvo's. It's too cold in Ohio to think of Volvo stuff. Though this morning I got to do some mild drifts in the empty, but frozen, work parking lot. :-)

-Ryan
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Athens, Ohio
1987 245 DL 314k, Dog-mobile
1990 245 DL 134k M47, E-codes, GT Sway Bars
1991 745 GL 300k, Regina, 23/21mm Turbo Sway Bars