Engine Temp - Chevy and GMC Duramax Diesel Forum
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Old 11-14-2008, 04:37 PM   eBay Motors  #1 (permalink)
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Question Engine Temp

Is it me or does it usally take a long time for the engine to warm up on a cold morning? A friend told me this is normal for diesels. I'm thinking I have a stuck open thermostat. Its several miles later after heading out in the morning before my temp hand even moves or I have any heat.

Is this normal? Or do I need to replace the thermostat?
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Old 11-14-2008, 05:24 PM   eBay Motors  #2 (permalink)
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I know for myself....my truck normally starts around 40-50 degrees. I let it warm up for about 10 minutes and it only goes to maybe 80...then after I drive it for 2-3 miles...it goes to like 120... I don't know if that helps....but it does normally take a bit.
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Old 11-14-2008, 05:27 PM   eBay Motors  #3 (permalink)
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The 02 doesn't have the high idle setting does it? Does it require a kit?
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Old 11-14-2008, 05:30 PM   eBay Motors  #4 (permalink)
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it does take a while, diesel engines have more cooling fluid than gas engine does. thats why it takes a while. it also has 2 thermostats to regulate the cooling system. its normal for a diesel engine to take a while to warm up. you can use your block heater to help it warm up quicker if you have one equipped in your truck. most truckers use block heaters to keep their engine warm for quicker starts and warmups in cold mornings.
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Old 11-14-2008, 08:08 PM   eBay Motors  #5 (permalink)
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Thanks for the info. I didn't know there was 2 thermostats... Seems like I'm learning something new everyday.
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Old 11-14-2008, 10:20 PM   eBay Motors  #6 (permalink)
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Its normal, They take a long time to get to temp. Dont worry about it.
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Old 11-15-2008, 10:53 AM   eBay Motors  #7 (permalink)
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Smile My cab is cold until a 160 temp or warmer......

Quote:
Originally Posted by St.Somewhere View Post
Is it me or does it usally take a long time for the engine to warm up on a cold morning? A friend told me this is normal for diesels. I'm thinking I have a stuck open thermostat. Its several miles later after heading out in the morning before my temp hand even moves or I have any heat.

Is this normal? Or do I need to replace the thermostat?
I can idle it for 20 minutes at 45 degrees and the water temp is still under 130*,just the way it is..You'd know about a stuck opened therm too,you would not get any heat in the cab after they usually warm up...Meaning[if therm stuck open,then no way for it to retain the temp then open,just may get to about 160*[if you lucky]and stay there]My truck will NOT blow ANY air into the cab until it's about 150-160,heard it is to keep cold air out cab until it can put heat into there to keep cabin warm..
when engineers get to sniffing glue huh??
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Old 11-15-2008, 12:06 PM   eBay Motors  #8 (permalink)
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Quote:
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The 02 doesn't have the high idle setting does it? Does it require a kit?
far as i know the 02 lb7 do it will only turn on after its about 10 below or somewhere close to that cant remember exactly what temp. if you want to add a comandable high idle check out ppe's high idle kit.
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