Question Engine Block Heater Plug-in - What does it do?

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Joined
Jul 27, 2019
Messages
3,903
Location
Midlothian, VA
RV Year
2017
RV Make
Newmar
RV Model
Ventana 4037
RV Length
40' 10"
TOW/TOAD
2017 Chevy Colorado
Fulltimer
No
On my 2017 Newmar Ventana, left aft basement is a plug that when plugged in it engages the engine block heater for cold weather ops. It's a high amp draw so it should be used only when needed for example tonight I'll plug it in for tomorrow's departure.

I've heard of some configuring the OASIS to be an engine pre-heat loop which seems to be different?

What exactly is happening when I plug in the engine heater plug on my Newmar Ventana? Is it coming from OASIS or is it a separate electrical heating system?
 
Joined
Nov 2, 2019
Messages
2,581
Location
WA, MT or somewhere else!
RV Year
2018
RV Make
Newmar
RV Model
Mountain Aire 4047
RV Length
40'
TOW/TOAD
2014 Honda CR-V
I believe it is a separate heating element in the engine block; no connection to Oasis. I also believe that Oasis has a connection to the engine cooling system and that can be used to heat the coach when traveling. Whether you can reverse that cycle and pre-heat the engine with Oasis is unknown to me.

You probably also have a switch on the dash to activate/deactivate the block heater receptacle in the engine compartment...at least, there is in our coach. Be sure to check or your block heater may not be active.

TJ
 
Joined
Nov 3, 2019
Messages
448
Location
Florida
RV Year
2018
RV Make
Newmar
RV Model
CanyonStar
RV Length
39' 11"
TOW/TOAD
Demco KarKaddy 460SS and VW Passat
Fulltimer
No
Here is a brief discussion on the pre-heat topic


And installation of option


Using pre heat user manual chapter 8.8

 
Joined
Sep 21, 2020
Messages
315
Location
Ringgold, GA.
RV Year
2006
RV Make
Holiday Rambler
RV Model
Ambassador
RV Length
40'
TOW/TOAD
2019 Jeep Grand Cherokee
A block heater will heat the oil in the oil pan in cold climates to make diesel engines easier to start. This was especially important about 30-50 years ago when diesel engines were mechanically injected and very hard to start. Modern day diesel engines are computerized and most have a high pressure rail injection system that starts almost as soon as you turn the key. The Cummins engines in the Ram trucks I sell will start to -20 degrees below zero with no starting aids,. Therefore when I spec out the trucks I sell I never put a block heater on the engine unless the customer specifically asks for it. I mean if it's -20 degrees in Georgia or anywhere in the Southeast where I sell my trucks, chances are the roads are impassable anyway!!! :ROFLMAO:

Another thing while we're on the subject.............It's a pet peeve of mine I guess. Why do guys with diesel trucks leave them running all the time?? They never shut them off!!! Even while getting fuel, they leave them running. In the convenience store? They leave them running. You know why??? Because back in their Grandfather's day their old diesel farm truck or tractor trailer was hard to start. So they left them running. THERE IS NO REASON TODAY TO LEAVE YOUR DIESEL ENGINE RUNNING IF YOU ARE PARKED!!!! Like I said above, with electronic fuel injection and computers these modern diesel engines start instantly!!

OK. I feel better. :LOL:
 
Joined
Nov 13, 2019
Messages
221
Location
Where ever I park it
RV Year
2017
RV Make
Salem
RV Model
Hemisphere 346RK
RV Length
38'
One reason to let them idle is to cool the turbo. If you shut them down with a hot turbo you run the risk of having the oil in the turbo cook and form coke. That will cause the bearings to fail prematurely. Remember, even at an idle the turbo is spinning at about 10,000 (yes, ten thousand) RPM and in a hard pull it could be in the vicinity of 160,000 RPMs!!
 
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