New water pump

NeillB

NeillB

Junior Member
My question is I just bought a new leakless pump from Snyder there are instruction that say if you are installing this in a car with a stock radiator to just install as is.... But if your car has a new radiator you need to grind off about 1/3 of the impeller blades because there will be to much flow and the newer radiators and they can not handle the return flow and will cause it to blow out the overflow. So my question is not how to remove the material but is this really needed to be done ? How can I tell if I have a stock radiator or a newer style radiator that have smaller cooling tubes that will could reduce the flow rate.

thanks, Neill
 
One way is to drill a hole in each blade of the impeller. I would first fill the radiator and see how long it takes to empty. It should really come out with force. I vaguely remember Les Andrews has this flow rate covered in his manual. If not, it has been discussed here. Not much to go on, but maybe I have pointed you in the right direction.
 
Just slip a 160 degree thermostat in the upper end of the upper hose to control the flow, and you'll be set to GO, Neil! Bill W. (I've noted that even when cold, the thermostat allows some circulation, probably through the tiny hole in it or the valve doesn't seat totally tight. Some who are scared to run a thermostat, the expanding wax operatd thermostats rarely ever fail, unlike oooooold designs with an air filled bellows. And yes, it operates well in the upper end of the hose, as HEAT goes UP, I hope I have that right, Where's Mike K?) Bill W.
 
Last edited:
Bill has a good suggestion...the thermostat should create some restriction and I bet it would be reduced by about 1/3. Way to go Bill!
Dave in MN
 
Thanks I do have a thermostat that I going to install I will try that I also found some other post that were helpful the thermostat should also slow down the flow and let the engine run at a good operating temp. Thanks
 
And maybe not overheat even. Just throwing water through the overflow tube.

See the service bulletins and "do the bend." And fret not if the water level wants to find itself a little lower. As long as when you operate the upper ends of the radiator tubes seem covered, and better the upper waterbox full, then you're fine.

Joe K
 
Joe K said:
And maybe not overheat even. Just throwing water through the overflow tube.

See the service bulletins and "do the bend." And fret not if the water level wants to find itself a little lower. As long as when you operate the upper ends of the radiator tubes seem covered, and better the upper waterbox full, then you're fine.

Joe K
Click to expand...
All,
"The Nail" "The Nail"!! The nail really works, as silly as it sounds. I rarely ever added water with the nail as a splash guard! Bill W.
 
Bill, I think you "nailed" it. (Aw, somebody must have made that comment before.)

Joe K
 
I had that problem with a new brassworks radiator, and a thermostat solved t he problem. Apparently the new radiators have smaller tubes then the originals. this makes the radiator cool better, but as they did not add more tubes to compensate, the new radiator will not flow the same gallons per minute as the old ones.
 
You must log in or register to reply here.
Back
Top