Leakless water pump

Rich Bowes

Rich Bowes

Member
A couple of years ago, I bought a leakless water pump (part #A-8501AE) from Macs, and had it installed on my car. Today, a friend and I were examining the pump, and found that there were real grease fittings on both the front and rear of the pump, when I had thought only 1 was supposed to be real. We also found that when the rear grease fitting was removed, water and antifreeze began to drip from the hole.

Three questions:

Should either grease fitting on a leakless water pump be real, or just for show? If so, which should be a real grease fitting, the front or the rear?

Should water/antifreeze drip from the hole when you remove the rear grease fitting, whether or not the grease fitting is real or fake?
 
this is the description of your pump right from MACS web page..
it says the front fitting is for show and the rear needs to be greased
 

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There's lots of variations in "leakless" water pumps, be sure you know what type you have.
I personally feel that some failures of "leakless" water pumps is caused by using DRASTIC radiator cleaners & ruining the rubber lip seals.
Bill W.
 
I agree with Bill. Rusty water or even loose rust floating in antifreeze will destroy the seal. It sounds like your seal is leaking since you mentioned antifreeze coming out the grease nipple. You can buy the seal seperately if the bushing is still good.
 
"Leakless pumps" One of the great mysteries of life under the hood. As Bill states...so many variations. I have purchased a James Rupert super duty which I have yet to install. I have been running a "Leakless" for the past eleven years. One of the fittings is clearly a dummy (rear) and I have never greased the front as the seller claimed it was "greaseless".
 
I've been using a James Rupert super duty pump for 4+ years, narry a drop has leaked.
 
IF I were to do Tom's "vinegar trick", I would switch my "leakless" pump, to an old stock pump, until I totally finished the cleaning, then change back to my "leakless" pump. I "think" rust flakes WILL NOT EVER be TOTALLY eliminated!!
Bill W.
 
We like the Rupert pumps. On the roadster pickup we originally put a leakless pump from one of the parts vendors. The roadster pickup was a pressurized cooling system and the pump started to leak. We replaced it with the Rupert pump and that held against the system.
 
JohnLaVoy said:
We like the Rupert pumps. On the roadster pickup we originally put a leakless pump from one of the parts vendors. The roadster pickup was a pressurized cooling system and the pump started to leak. We replaced it with the Rupert pump and that held against the system.
Click to expand...
John,
A quick, easy way to pressurize a system: Buy an early VOLVO coolant expansion tank, which uses a shallow depth pressure cap, run a hose from it to the bottom of the overflow tube & use a 4 1/2 LB cap, EASY!! YOU MUST HAVE A COMPLETELY LEAK PROOF RADUMATOR CAP, TO ACCOMPLISH THIS!
THEN, your RADUMATOR will stay totally full & eliminate AIR BUBBLES in the system, which are a NO-NO to cooling system EFFICIENCY:eek:
Bill W.
 
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