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Old 12-27-2011, 05:25 PM   #15
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I guess my Detriot Series 60 motor according to the owners manual has different requirements than a Cummins motor. I will stick with what Detroit tells me. I watch my boost gauge and it always shows the turbo spinning up and down even when driving slow through the gears after I am off the highway. If that turbo is spinning up and making boost then it is heating up from the exhaust flow since that is how it works. Four to five minutes is cheap insurance to coking up an oil line which will result in starving the turbo for oil later and will result in a turbo failure. I like to see my water temp at least at 100* before i move. That also warms up the transmission.
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Old 12-27-2011, 07:55 PM   #16
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It's your motor, run it like you own it.

I watched a fire engine with a Detroit 60 run 200,000 miles fired up from a cold start, absolutely no warm up time, and no block heater to keep it warm, until full throttle for anywhere from 1 minute to 10 minutes, then idled for 5 minutes to several hours. Or depending on the circumstances run wide out to the call and then shut off immediately on arrival. (Tacoma WA Engine 10 for the doubters, almost 50,000 runs in 14 years of service, some trade magazines had it in their ads a couple years ago)

No major engine problems and if I remember the mechanics correctly only 1 set of injectors in that time. Dozens of alternators, even more brake rotors. If that kind of abuse doesn't convince you that the new diesels are well built then nothing will.

Ken
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Old 12-28-2011, 09:40 AM   #17
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That type of abuse is called "operational necessity" and is 100% justified. That is why the Detroit was used. If it breaks then fix it with fire department money and do it again. I have no requirement that justifies me running my motor like that.
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Old 12-28-2011, 01:18 PM   #18
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Originally Posted by Mike Canter View Post
I guess my Detriot Series 60 motor according to the owners manual has different requirements than a Cummins motor. I will stick with what Detroit tells me. I watch my boost gauge and it always shows the turbo spinning up and down even when driving slow through the gears after I am off the highway. If that turbo is spinning up and making boost then it is heating up from the exhaust flow since that is how it works. Four to five minutes is cheap insurance to coking up an oil line which will result in starving the turbo for oil later and will result in a turbo failure. I like to see my water temp at least at 100* before i move. That also warms up the transmission.
+1 on this .. I have a Cummis and I do 4-5 min at start up and 4-5 min after stopping for cool down. 5 min seems like a minor amount of time to me .. but thats me .
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Old 12-31-2011, 09:32 PM   #19
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DBeauchamp said
never nedded the engine running to bring slides in or jacks up.
If you dump air when you use the jacks, I hope you dont roll before the bags reinflate
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Old 01-01-2012, 07:24 AM   #20
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Bigd2, since it seems your question is not yet answered. I had a Freightliner, with a 500HP Detroit, it would consume about 1 gal./hour at idle. K
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I had a 425 cat in my semi, it would take 1 gallon per hour. To Idle in winter all nite I would set Idle at 1000. 730,000 miles with no damage to engine.
I knew the answer was out there. Thanks for the input.
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Old 01-01-2012, 10:23 AM   #21
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I hope you dont roll before the bags reinflate
Nope, when I start my engine, the bags are the only thing left, 2 minutes and I'm moving (out of respect for neighbors). The time it takes to roll out of CG, engine is plenty warm and oiled up... and as I said earlier, I attach the Jeep at the exit from the resort. Diesel engine fumes don't stink as much any more but engines are still noisy.
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Old 01-01-2012, 12:25 PM   #22
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The OP asked how much fuel the Cat 400 used at idle. I think some folks have answered that, but it makes me ask the obvious question, why do you ask? I have never had to idle mine for more than a few minutes. Now, I have an aqua hot and on the few really cold nights where I have had to start it in the morning I could warm the engine from the boiler - I usually get it above 32F before I fire it, on one occasion it was at -20F when I started warming it with the aqua hot.

Cat's website includes a video that strongly suggests that the engine be fast idled (1,000 to 1,100 rpm) when idled for long periods due to stresses on the bottom of the engine at low idle. I found this a little surprising. They say that one hour of low idle puts as much wear on the engine as 120 miles of highway driving.

I will occasionally move mine without warming it up, but my strong preference is like Mike's - get it near 100F before I move it, which takes about 4 minutes, and idle it for 3 to 4 when I stop it from speed (or more specifically from working hard, slowly climbing a hill calls for a cool down).
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