Which Block Heater Do I Choose??(NHC250)

[No.2Diesel]

Hi,

We're still going through some items on the M819 (misc. coolant hoses, alternator etc.) and would like to install a block heater while we are draining some coolant.

Looking in the ZeroStart catalog, there are a dozen or more choices for the 855ci Cummins. Which one is right? The catalog also recommends that if your application is not provided, in-line hose heaters are available.

Does anyone have a block heater installed on their NHC250 and which one is it?
A coolant filter seems like a good idea too.

Thanks

 

[WillWagner]

Try here. Use the CUN151B or BH
http://www.kimhotstart.com/kimhotstart/uploads/documents/catalog/hdt-400_pgs4-13.pdf

 

[No.2Diesel]

Thank you

 

[73m819]

i found my block heater new on ebay for about 35, just do a search for block heater, i cant give you the name or part number as im in la

 

[GIJoeCzar]

ABSOLUTELY install the block heater! It's the ONLY way to go for cold weather starts. Although the Cummins like the candy (ether), block heater plugged in four hours prior to cranking makes the motor start like it was just shut down. Make sure you clock the element correctly; go to:

http://czarnik.net/joe/My_Stuff/Sur... Cummins Small Cam Block Heater Locations.JPG

If you've got an M809 you'll need to install your block heater in the rear plate (or remove the exhaust manifold to get it in the middle plate). I've got the zerostat block heater number at my shop, and I'll be at my shop this Friday.

Give me a call at (60 567-8281 if you don't have the number by then.

REMEMBER TO CLOCK THE BLOCK HEATER CORRECTLY!!!

Good luck,

Joe

 

[No.2Diesel]

Wow many thanks for the info and the illustration. Taking the exhuast manifold off doesn't sound like fun right now. Thanks for enlightening me about alternate locations.

The 819 is way too much fun to drive around in. The wrecker saunters around town like a brontosaurus. And I thought my whistler Deuce was loud. Did I mention the black smoke?

 

[redass73]

why clock the element?

 

[No.2Diesel]

I think you have to make sure that the element is not directly contacting the block to prevent damage to the element. It should be placed parallel with the flow of coolant as well so as not to obstruct flow. Thats just my guess.

 

[Jones]

To assure good coolant circulation around the element. Also, so it doesn't lay against the block casting and create a hot spot; or short out if the ceramic coating gets chipped or worn off.

 

[cranetruck]

I believe the heating element creates its own circulation by convection. Some external models have a built-in check valve to assure that the coolant flows in a specific direction as it is heated.