Thanks folks for the informative replys. When I noted the cooling history of my car I failed to mention that everything is fine now. Rad., pump and fan have all been replaced and function correctly. I just like the idea of less stress on the pump/hoses/rad. etc. I do have a lot of miles on the car (see sig.)

Good point about losing coolant, I guess I would need to carry extra.

If I do convert how can I tell when my coolant has reached 230+ (to drive out residual water)? Leave the rad. cap off and use a thermometer? My guage in the car doesn't go that high (I don't think). How do I stall the fan?

Thanks again
Cal

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K