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Old 01-09-2011, 05:55 PM   #15
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Originally Posted by dieselclacker View Post
Dave, the reason for recycling the pre-heat system for the engine is to re-set it to cycle on again. Most if not all pre-heat system have a timed cycle, (when the light goes off, engage the starter). By recycling it a couple of times without engaging the starter, warmer air is produced for the engine to start on.

On my CAT C7 I can actually hear the grid heater come on when I cycle the ignition key. And yes, it comes on more than once if you cycle the key. Just watch your battery gauge.

Dirk - When I owned my Cummins 5.9 ISB, it too would cycle more than once even after the engine started. Again, watch your battery gauge.

On edit, yes, there is a temperature sensor in the system which if the ambient temperature is warm outside precludes the grid heater from coming on. Not needed.

'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX
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Old 01-09-2011, 06:13 PM   #16
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I have found no need to recycle the preheater on my Cummins. Once the Wait To Start light goes out, it always starts right up.

Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP

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