The engine in my track car has one, (as-stock) its plumbed into the hot side radiator hose behind the thermostat (so it only receives hot water after the engine is up to temp.) I've considered either dual-stacking it with a thermostat oil cooler, or plumbing it in differently so it would receive cooler coolant. However, just keeping the coolant temperature low overall by keeping the cooling system efficient seems to do the job.
I also took one and installed it on my diesel, but never got around to plumbing it in. I was going to put in in-line with the heater matrix so it would help heat up faster.
Quote:
Originally Posted by Daox
Toyota like many domestics I'd assume uses a 3/4"-16 thread.
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Toyota uses m20x1.5 thread in the rest of the world, I can't imagine them changing *that* on US-sold cars..