Assuming you have good batteries and without any starting aids like grid heaters what is the coldest these engines will start at?
I like the idea of this, can you update us when you get one?Had -5C here so far. I get one "re-er" out of the starter and it's running. 1/2 crank and it's running, battery is the original 525CCA Mopar battery that came with the truck in 2000 (half life reading on load test). Not on the block heater, no grid heater either.
Apparantly there's a 'flame tube' heater for the 4bt. Takes fuel out of the return line and burns it in the intake manifold to heat it up. I want one just because it sounds cool.
It depends on your needs and actual climate.I was thinking of adding a grid heater from a 6Bt, think I'll need it?
Two of the vans I have dont have grid heaters but they do have the square intake to install grid heater, its Cummins part, not chopped 6bt intake. But havent looked at part #The 4b have block heaters ,not grid heaters unless they have been installed from the 6b.The 2 Vans started just fine @ 20 * .
My 6b will start @ 15 * under that I have to use the grid heaters.