I'm wary of any claim by JCWhitney, and I haven't bought anything from them in years. The fact that the coolant heater connects to the heater loop limits it's effectivity because of the small hoses restricting the passive circulation. I would give it a chance if it connected directly to the lower radiator hose, otherwise I doubt that heater would be very effective.

On the other hand, your mechanic is at least partly right that the factory block heater is a PITA to install, especially with the engine in the car. But it works.

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'83 240D with 617.952 and 2.88
'01 VW Beetle TDI
'05 Jeep Liberty CRD
'89 Toyota 4x4, needs 2L-T
'78 280Z with L28ET - 12.86@110
Oil Burner Kartel #35

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