changfa cooling system options

[mobile_bob]

as most know by now i am a proponent of the changfa 195 engines
and most also know they use hopper cooling and some use a pos radiator and water pump

mine, i deleted the hopper in favor of a block off plate, and then set out to attach a tstat

my solution was found at a salvage yard, i used the tstat housing off a little honda car 4 cyl engine
it bolts down to the plate and has a riser section that is about 3 inches tall, a nice size appropriate tstat
and a bypass port 1/2" nipple as well. also has a 3/8" FNPT port for a temp sensor or temp guage bulb.

works really well on these engines.

also because of the compact nature of the unit i was not able to use the thermosiphon method and went with
a waterpump, for that i found a bosch auxilliary heater pump, nice little unit that has 3/4" hose barb ports
and runs on 12volts, it moves sufficient water to cool up to approx 15hp continously in testing with no problems.

the radiator came from a mid 80's nissan sentra, and came with its own electric fan and fan temp sensor control
so that the system temp stays between 190 and 205 degree's F, and yes it is an enclosed system with 7lb radiator
cap, and an overflow bottle from a mazda rotary. the engine gets up to operating temp and burps about a pint or so
into the overflow and when the engine is shut down and cools off it sucks the pint back into the radiator.

this system works flawlessly, and all the parts came from a local pick a part yard for a total cost of maybe 75 bucks or so
save for a new tstat that i put in.

its kind of cool watching the unit running under load, and see the temp climb, watch when the tstat opens and the system
run more till the temp gets high enough to trigger the fan on. after everthing is stablized the fan regulates the temperature
and the tstat stays open.

i figure why reinvent the wheel when the car manufactures spent so much money engineering solutions that fit my needs perfectly.

i will try to post pics later when i find where i filed them, or will take more.

bob g

[Henry W]

Bob,

Thanks for posting this. I need to delete hopper cooling on My S195. I am tired of refilling it every 45min.

Henry

[jkrobbie]

Pics would be wonderful.  I got rid of the hopper on my 7.7hp JD and ran a line to a five gallon bucket.  It worked well, but your system sounds much, much better.  I hated having to keep adding water to the hopper and the bucket.  It also gets cold in my neck of the woods in the winter, so having a water only system doesn't work so well.

robbie

[veggie]

Something to consider.....
When fabricating your blanking plates, try to make enough room for a couple of 3/4 or 1/2 NPT ports.
One for a gauge, and one for a temperature sensor. (in case of automated controls or high temp shutdown)

If you don't need them right away, just screw in a pipe plug.
In the future, you may be happy they are there.

It's not the best picture to view them, but here's how I did mine....(Plugged at the moment)


Cheers,
Veggie

>>> Click the picture to enlarge <<<

[Shipo]

Bob,

Thanks for posting this. I need to delete hopper cooling on My S195. I am tired of refilling it every 45min.

Henry

Henry for your reference look what i did to my 195..

http://www.youtube.com/user/shipo107#play/all/4/eN5-nhcjH_A

[Henry W]

Looks like a nice simple setup. Thanks for posting it.
BTW, what make and model of radiator is it?

Henry

[Shipo]

I bought this radiator on eBay. Surplus Center use to have it also but they ran out. The description was "RADIATOR FOR 23-28 HP ENGINE W/OIL COOLER Item# 28-1559."

[Henry W]

Thanks Shipo,

Yea I waited to long.

Henry