double radiator questions

[GsxRzrGo-13]

For my first post to the forum i will start with thanks for having me and also thanks for any help i can get. all of my posts will be related to bike topics but also since i do not have a bike just the motor they will all have a twist.

i have read about burping the cooling system and see the importance of it. i have two radiators on my golf cart. the coolant leaves the thermostat and heads to the front one. factory banshee. then it returns to the factory busa radiator. the second is much higher than the motor. i have the fan still attached to the second one. then the coolant returns to the bottom port on the motor. the breather that leaves the thermostat is direct into the second one. the motor is sideways in the cart and i cant shake it to burp it correctly as stated. any suggestions on how to get the air out? also i cant get the fan to turn on. it was my hopes to have enough coolant that it wont need to stay on but the gauge will hit barely above on the half way. if i jump the sensor on the radiator the fan does come on so wiring is correct.

 

[Zoinks!]

As far as the burping goes, I'm not sure what you're talking about shaking. To burp a cooling system just fill it up, run the engine with the radiator cap off, wait till the thermostat opens and the coolant level drops, then add what's needed to fill the cooling system.

 

[GsxRzrGo-13]

i guess what i mean by shaking is also referred to as rocking the bike back and forth. in a side to side fashion. i would assume to help the air pockets escape.

also does my overflow bottle need to be higher than the radiator cap?

 

[markiee43]

i CEEEEEEEEEEE QQ /what your saying thats is a good way to / i guess but just run it with the cap off and wait till thermo opens and then add coolant as needed and top off radiator and tighten cap on radiator and make sure your over flow bottle is filled to the full mark as the system cools down it will suck some of the coolant out of the bottle and in to radiator then top off coolant bottle and u -R good to go>>>> be---safe---out---there after topping off radiator let your bike cool off for about a hour and then ride it hard

 

[GsxRzrGo-13]

i did the first test today to see what would happen. the temp stayed right at the mid line on the gauge for about 20 mins at idle. then i took it to 5500 for about a min. all of a sudden the temp shot up to red and the fan still didnt turn on. does anyone know the correct ohm reading for the sensor in the radiator?

 

[Hayabusa2005]

As far as the burping goes, I'm not sure what you're talking about shaking. To burp a cooling system just fill it up, run the engine with the radiator cap off, wait till the thermostat opens and the coolant level drops, then add what's needed to fill the cooling system.

 

[GsxRzrGo-13]

again let me state the motor is not in a bike anymore. its in a golf cart of sorts. i cant get all the air out in a typical way. maybe some pics would help

1 is the motor from the outside looking in passenger side
2 is the back of the front radiator. the close hose goes in the bottom and the far hose returns out the top
3 the return hose from the last rad goes into the top of the stock. then the stock radiator returns to the water pump on the bottom of the motor
4 the other side showing the oil cooler and plumbing

 

[warezdog]

That cart is SIIIIIIIiiiiiiiiiick!

 

[rubbersidedown]

Start motor.warm-up.keep running.place rag over rad opening(too catch coolant).squeeze lowest rad hose repeatedly.air will bubble out.fill as required.

RSD.

 

[ibified]

holy CHIT that looks like a good time. Well that or it has "hey y'all, watch this" written all over it...

 

[Mr Bogus]

the best way to top off that type of setup is to add another radiator cap.. The cap needs to be at the "high" in the system.. Preferably at the very top.. There are inline hose units that you can either buy or have made.. (this is provided you do not have a fill point at the top of the cooling system)

Alternate method.. while engine is cold, remove the upper most hose in the system and start adding coolant until through the open hose until it is full.. reseal the system, run it till hot again and repeat...

 

[macon454]

to the org. that is a fun looking setup you have there.

 

[rubbersidedown]

Yer exhaust system is different.???

I've seen 4-2-2

I've seen 4-2-1

I've seen 4-1.

Butt never seen 4-2-1-2....???

Just razzin' ya...

RSD.

 

[mike1180]

Welcome!

 

[The Big Red One]

I just got through draining/flushing/refilling my busa cooling system.........squeezing the hoses worked VERY well to burp the system. Fill it up to just a bit below the rad neck for the burping process (too full and it'll squirt coolant out and make a mess), squeeze the hoses a few times, add more coolant, squeeze again, keep that up till she takes no more...then fill the rad all the way up..fire her up and run till fan comes on, let it cool down for a couple hours or overnight and then top it off. Maybe do that once more if you're anal like me and you're good to go. You might need to add a couple ounces to the overflow bottle after that, but that should be it

 

[dadofthree]

 

[BusaWizard]

Aboard.

 

[pbghost]

looks like a blast when it gets donethe only things I noticed that might cause an issue is 1) with the upper radiator clocked 90' out, the flow of coolant is vertical instead of horizontal(don't know if it really will make a difference or not, just seems like it(the pump) would have to work harder.
2) might consider a booster pump, anyone know what the stocker is rated @?
3)the heat from the exhaust is perfect to preheat the air for the radiator that's cupped over the top of it, maybe relocate the radiator off to the side or reroute the exhaust.???
none the less, looks awesome
ps...pics of the whole thing

 

[GMbusa]

You could really help yourself out by welding a 90deg angle to the filler neck of that upper radiator. Otherwise your not filling the radiator correctly.

 

[Mr Bogus]

looks like a blast when it gets donethe only things I noticed that might cause an issue is 1) with the upper radiator clocked 90' out, the flow of coolant is vertical instead of horizontal(don't know if it really will make a difference or not, just seems like it(the pump) would have to work harder.
2) might consider a booster pump, anyone know what the stocker is rated @?
3)the heat from the exhaust is perfect to preheat the air for the radiator that's cupped over the top of it, maybe relocate the radiator off to the side or reroute the exhaust.???
none the less, looks awesome
ps...pics of the whole thing

down flow or cross flow wont matter much at all (never made any difference on cars).. Cars DO put the hot hose on top

Booster pump wont make any difference as long as the system is "sealed" the amount of force required to push the water UP to the radiator is taken care of by the amount of weight put on the water from hose going DOWN.. (off setting as long as system is sealed)


now the question begs... what to do with a 160HP golf cart...