How long do your glow plugs cycle?

-Paladin- · **Posted:** Tue Oct 26, 2010 6:33 am

On my Cummins, when cold starting the grid heater cycles for about 20 sec or so. On this CRD, it seems like the glow plug light in the dash only comes on for a couple sec when cold, and not at all when warm. Is this normal? Thanks!

flman · **Posted:** Tue Oct 26, 2010 6:36 am

-Paladin- wrote:

On my Cummins, when cold starting the grid heater cycles for about 20 sec or so. On this CRD, it seems like the glow plug light in the dash only comes on for a couple sec when cold, and not at all when warm. Is this normal? Thanks!

Yeah, that is about it for the Libby glow plugs, only a few seconds, I guess they put out plenty of heat in that time? They are ceramic.

warp2diesel · **Posted:** Tue Oct 26, 2010 7:47 am

Longest I have seen was ~4 seconds at -14F when I was at the Airport.
Our Canadian members who don't plug in may have seen longer on times.
For me, if I am at home, I plug in at 0 F.

-Paladin- · **Posted:** Tue Oct 26, 2010 7:50 am

Ok, I feel better then. Thanks for the quick replies!

LibertyCRD · **Posted:** Tue Oct 26, 2010 7:54 am

I wish there was a way to make them stay on a bit longer, and the light on the dash stay on longer as a reminder in addition. I think that would be helpful.

RJM · **Posted:** Tue Oct 26, 2010 8:57 am

The longest I have seen them on is 4-5 seconds, at -35.

ATXKJ · **Posted:** Tue Oct 26, 2010 1:30 pm

The light on the dash on stays on for a few seconds -but the glow plugs stay on for a couple of minutes (the chart is in the Service manual) but it depends on outside temp and coolant temp.

Quote:

Engine.............Wait-To..........Pre-Heat......Post-Heat
Coolant............Start Lamp......Cycle..........Cycle
Temperature......ON
Key ON
-30C................10 SEC..........35 SEC....... 200 SEC.
-10C................10 SEC..........23 SEC........180 SEC.
+10C................ 1 SEC..........21 SEC........160 SEC.
+30C.................1 SEC..........20 SEC........140 SEC.
+40C.................1 SEC..........19 SEC..........70 SEC.
+70C.................1 SEC..........16 SEC..........20 SEC.

WolverineFW · **Posted:** Thu Oct 28, 2010 2:36 am

I think I had mine light up for about 5 seconds at -10C once or twice. Normally it barely flashes if it comes on at all.

KaspinCRD · **Posted:** Thu Oct 28, 2010 1:37 pm

The light on the dash is more of a "readiness to start" indicator than a "glow plug = on" indicator.

mikey1273 · **Posted:** Mon Nov 01, 2010 8:48 pm

mine never for more than 4-5 seconds last winter when it was 15°F but it ran rough for a few seconds after it started. Plugging in when its that cold is nice but it don't need to be all night. a timer set to run it 2-3 hours before you go in the morning is good enough.

How long do your glow plugs cycle?

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