www.bus-boys.com Thermo-Time Switch This operates your Cold Start Valve. When your engine is stone-cold or in cold conditions when your engine is warm, there is a temperature controlled probe that samples the ambient air temperature in the engine compartment. At certain (i.e.: cold) temperatures, it completes the electrical circuit to your Cold Start Switch to operate it. After the engine is started, the ECU disconnects the power to the Thermo-Time Switch, shutting the electrical current off to your Cold Start Valve. While the engine is running however, the temp probe is still measuring the ambient temperature and also keeps the switch off if above a certain point. This is why your cold start valve should not work in warm temperatures or when the engine is still warm. Consult your Bentley Manual for temperature ranges. 311-906-163C 1974 Calif Automatic $59.33 (See Note below) 043-906-163 1975 Only $61.61 (See Note Below) 043-906-163A 1976-1979 $68.70 1974-1975 models not normally stocked and must be special ordered - approximately 3 days lead time at the worst. These are VERY SLOW movers which is why we do not stock them on a regular basis. Bosch has indicated these will be obsoleted very soon. ----- Original Message ----- From: "kelly dosch" <kellydosch@xxxxxxxxx> To: "Texas Coalition of Buses" <tcb@xxxxxxxxxxxxx> Sent: Wednesday, February 2, 2011 9:46:32 PM Subject: [tcb] Does Anybody Know Where to Get a Thermo Time Switch? I've checked EIS Parts, Vee Dub Parts Unlimited (clearly limited), and Bus Depot. Does it have another name, maybe? (It's for a 1979 F.I. 2.0L)