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when to use the block heater

 
jwentzel526
New User
Posts: 36
Joined: 08/11
Posted: 09/15/11 05:28 PM

I just bought my first diesel truck this year and the weather is starting to get cold where I live so I would like to know when I should start plugging the truck in and if I were to plug it in even when temperatures are in the 40's if that would hurt having the truck plugged thank you.  
07 Silverado Classic CC SB 4x4 LBZ LT3 mbrp downpipe upgrade 4 inch turbo back MBRP Cool Duals Quadzilla Stealth 2 at 90 hp, AFE hot pipe upgrade, AFE stage 2 cold air pro guard 7

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The_Copenhagen_Kid
User
Posts: 119
Joined: 03/10
Posted: 09/15/11 08:11 PM

I live in south Texas. 40 deg is cold here. I plug it in when it gets in the forties. No problems  
David
_____________________

Big trucks shouldn't be this fast!

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jwentzel526
New User
Posts: 36
Joined: 08/11
Posted: 09/15/11 09:28 PM

I live up by St.Louis in Illinois and I think forty is about the average in the fall for us up north. Thank you for the help!  
07 Silverado Classic CC SB 4x4 LBZ LT3 mbrp downpipe upgrade 4 inch turbo back MBRP Cool Duals Quadzilla Stealth 2 at 90 hp, AFE hot pipe upgrade, AFE stage 2 cold air pro guard 7

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MarineOne
Addict
Posts: 2070
Joined: 10/08
Posted: 09/16/11 02:09 PM

If you're concerned about it, put it on a timer so that it pre-heats the engine about 4 hours before you need it.

Lowe's, Home Depot, Ace and Tru-Value, etc., will have them .... just tell them what it's for if you're concerned about not getting the right one.





-Kris  

2006 Dodge Ram 2500 QC 5.9L - Smarty CR S-06 on SW #5

2008 Dodge Ram 3500 QC 6.7L - H&S MiniMaxx on DPF tune for towing
Titan Fuel Tank
Aero Muffler 4040XL
Nathan AirChime K3LA

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The_Copenhagen_Kid
User
Posts: 119
Joined: 03/10
Posted: 09/16/11 02:38 PM

That's a great idea. I'm going to try that of it ever cools off down here. Were in a drought and averaging in the hundreds every day.  
David
_____________________

Big trucks shouldn't be this fast!

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01 24 valve
Enthusiast
Posts: 317
Joined: 11/09
Posted: 09/16/11 06:16 PM

once ur truck starts to start a little harder then ull know i mean i plug my truck in if its like -10 degrees celcuis i dont have to plug it in then but the truck warms up quicker and its easier on the engine  
2001 dodge ram 2500 ext cab short box 5 speed 4 inch down pipe into 5 inch strait pipe exhaust into 6 inch chrome dual aussie stacks, 90hp injectors with 200hp tips, quadzilla adrenaline tuner with monitor , ,  bd lift pump, AFE stage 2 cold air intake, ARP head studs, ATS three piece exhaust manifold with t4 flange,Garrett ta45 turbo southbend dual disc 750hp clutch with 1 3/8" input shaft

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Stygimoloch
User
Posts: 127
Joined: 11/10
Posted: 09/17/11 05:49 PM

The block heater really should be used every day no matter the temperature.
The less time the engine is running below operating temp the longer it will live.  
____________________
1982 300D VNT
M-Pump, GT2356V VNT Hybrid turbo, A/W intercooler, W/M injection, straight pipe exhaust, W126 Gen-II 300mm brakes, battery relocated

1980 240D 3.0T
OM617.95, 4-speed

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Richies Truck and Auto
Enthusiast
Posts: 362
Joined: 05/08
Posted: 09/19/11 05:06 AM

Hey jwentzel, what year is your Dmax? You can plug the LB7 and early LLY in anytime you want but the LBZ and LMM motors have 2 ambient air temp sensors and if the block heater is plugged in for too long it will result in a limp condition due to the delta between the 2 sensors exceeding a programmed threshold.  
Rich
05 GMC 3500HD CC/LB LLY
Fully built!
06 GMC 2500HD CC/SB LBZ:
Being built....
2011 3500HD H&S...
2013 Denali 3500HD H&S....

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Richies Truck and Auto
Enthusiast
Posts: 362
Joined: 05/08
Posted: 09/19/11 05:12 AM

Additionally, GM states not to plug it in unless ambient temps are 0 degrees F or below on the LBZ. Personally, I think thats ridiculous but they do warm up extremely quickly (intake grid heater and so on) so plugging in above ~30 I think is a needless use of electricity.  
Rich
05 GMC 3500HD CC/LB LLY
Fully built!
06 GMC 2500HD CC/SB LBZ:
Being built....
2011 3500HD H&S...
2013 Denali 3500HD H&S....

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Stygimoloch
User
Posts: 127
Joined: 11/10
Posted: 09/19/11 06:55 AM

There is no such problem. The engines natural heat production would cause far worse issues if such an imaginary issue existed.  
____________________
1982 300D VNT
M-Pump, GT2356V VNT Hybrid turbo, A/W intercooler, W/M injection, straight pipe exhaust, W126 Gen-II 300mm brakes, battery relocated

1980 240D 3.0T
OM617.95, 4-speed

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01 24 valve
Enthusiast
Posts: 317
Joined: 11/09
Posted: 09/19/11 10:02 PM

if u had a 3rd gen cummins you would never have to plug ur truck in lol  
2001 dodge ram 2500 ext cab short box 5 speed 4 inch down pipe into 5 inch strait pipe exhaust into 6 inch chrome dual aussie stacks, 90hp injectors with 200hp tips, quadzilla adrenaline tuner with monitor , ,  bd lift pump, AFE stage 2 cold air intake, ARP head studs, ATS three piece exhaust manifold with t4 flange,Garrett ta45 turbo southbend dual disc 750hp clutch with 1 3/8" input shaft

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Richies Truck and Auto
Enthusiast
Posts: 362
Joined: 05/08
Posted: 09/20/11 08:05 AM

Stygimoloch, thank you so much for clearing that up. Your invaluable input will provide so many people with such a simple solution when wondering exactly what it is that is happening to their truck. Yes, you are correct. If there were a "naturally" occuring spontaneous, exothermic reation, it would infact create "far" worse concerns. I can easily see how the problem would transpire, considering the engines operating system is dormant when such an event would take place. However, since this is a topic related to a real question concerning the particular time when a Duramax block heater should be used, the need to address an actual TSB exists. The very real TSB concerning ambient air temp sensors resulting in CEL/reduced power in RPO LBZ Duramax engines most certainly is real. Enjoy your day sir. Smile  
Rich
05 GMC 3500HD CC/LB LLY
Fully built!
06 GMC 2500HD CC/SB LBZ:
Being built....
2011 3500HD H&S...
2013 Denali 3500HD H&S....

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Richies Truck and Auto
Enthusiast
Posts: 362
Joined: 05/08
Posted: 09/20/11 08:12 AM

Stygimoloch, thank you so much for your well thought out info. I actually took the time to post the TSB (which is very real btw) However, thanks to the outstanding operating system governing this web template, the page timed out and the post and the info contained within was lost. Sorry guys.  
Rich
05 GMC 3500HD CC/LB LLY
Fully built!
06 GMC 2500HD CC/SB LBZ:
Being built....
2011 3500HD H&S...
2013 Denali 3500HD H&S....

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jwentzel526
New User
Posts: 36
Joined: 08/11
Posted: 09/25/11 08:28 PM

my duramax is an LBZ powered 07 silverado classic cc sb 4x4  
07 Silverado Classic CC SB 4x4 LBZ LT3 mbrp downpipe upgrade 4 inch turbo back MBRP Cool Duals Quadzilla Stealth 2 at 90 hp, AFE hot pipe upgrade, AFE stage 2 cold air pro guard 7

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