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Heater Booster Pump

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09-13-2009, 12:46 AM
Rusty
Heater Booster Pump
I've noticed (especially when the OAT is around 10°F), that my dash heat is weak except when the engine idles. I suspect that when running the opening of the thermostat reduces flow to the heater core.

I'm considering installing a booster pump to harvest engine heat before the radiator wastes it.

Any suggestions like sources/part numbers?


Rusty

MilSpec AMG 6.5L TD 230HP; built-to-order by Peninsular Engines: Hi-pop injectors, gear-driven camshaft, non-waste-gated, high-output turbo, 18:1 pistons. Fuel economy increased by 15-20%, power, WOW!"StaRV II"

'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP

Nelson and Chester, not-spoiled Golden Retrievers

Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke

It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
09-13-2009, 10:28 AM
Lee
Rusty, How about one of those small brushless motor circulating pumps designed for closed-loop solar systems?...handle either suction or head pressure, 3-4 ltr/min flow, glycol, high temp and voltage tolerant, etc.
09-13-2009, 08:22 PM
Rusty
Thanks for the suggestion! However, I couldn't find any that were 12VDC - 12VAC, 24VAC, or 120VAC.

I think I've found what I need.

I cruised the school bus tech forums, and the Groco pumps were greatly favored over the Bluebird and Bergstrom.


Rusty

MilSpec AMG 6.5L TD 230HP; built-to-order by Peninsular Engines: Hi-pop injectors, gear-driven camshaft, non-waste-gated, high-output turbo, 18:1 pistons. Fuel economy increased by 15-20%, power, WOW!"StaRV II"

'94 28' Breakaway: MilSpec AMG 6.5L TD 230HP

Nelson and Chester, not-spoiled Golden Retrievers

Sometimes I think we're alone in the universe, and sometimes I think we're not.
In either case the idea is quite staggering. - Arthur C. Clarke

It was a woman who drove me to drink, and I've been searching thirty years to find her and thank her - W. C. Fields
09-13-2009, 10:24 PM
Gary Carter
If you are looking for a used one, call Nimco bus parts in NJ. almost all buses use them


'92 Barth Breakaway - 30'
5.9 Cummins (6B) 300+ HP
2000 Allison
Front entrance
09-13-2009, 10:33 PM
Relative
MPPUMPS is the most common circulation pump that I've found. Their School Bus pump is a good candidate for you and the pump portion is rebuildable. 6GPM (or less) and 12V are the basic specs. Various MPPUMPS part numbers 29924, 28985, 28987 - perpendicular or vertical inlet/outlet arrangements differ.

NAPA 3/4" hoses with a 90-degree bend are useful - P/N 8078.

MPPUMPS is a division of Tecumseh.

Bergstrom is out of business and their 12V pumps were not rebuildable.

I've seen these on ebay at various times and other similar ones - search 12V circulation pump.


Mike
1995 Country Coach Magna,
Cummins C8.3-300, Banks Stinger, Gillig Chassis,
PowerTech gen w/Kubota 3-cyl,
2005 Wrangler pusher,
"Diesels gather momentum not accelerate"