Cavitating water pump

[kangaroo123]

Hi, I have a 77 Range.The water didn't circulate at all,so I replaced timing cover housing as it was a bit worn.The pump looks as new inside,but still no water going round???i have taken out the thermostat so there is no resistance.I have cleaned tha radiator properly but still the system is dead?????????It should work but doesn't.I haven't a clue now ,hoping somebody might have a clue please.:(

[400HPONGAS]

Interesting , How did you determine there was no circulation ? .(see if the heater works ?)Top hose off , Thermostat removed ? perhaps your lower hose has collapsed , is it sucking itself closed ?
As for cavitation , unless you have substantially sped it up somehow , than the lack of flooded suction may do it . System fully bled and de-aerated ?

[kangaroo123]

Interesting , How did you determine there was no circulation ? .(see if the heater works ?)Top hose off , Thermostat removed ? perhaps your lower hose has collapsed , is it sucking itself closed ?
As for cavitation , unless you have substantially sped it up somehow , than the lack of flooded suction may do it . System fully bled and de-aerated ?
Hi, with the top hose of there is no flow at all.I have taken out the therostat,not the bottom hose.The water pump looks in good order,as new??? but it just doesn't pump.A total mystrey to me.

[pfillery]

Are you running coolant rather than water? I was told that sometimes the pumps will cavitate with water but not with coolant, more dense or something according to the repco guy.

Are you sure the pump is ok internally and not rusted away, the right pump for the motor, not corroded or the impeller has come away from the shaft and broken inside? You might have to take the pump off.

[LOVEMYRANGIE]

Are you running coolant rather than water? I was told that sometimes the pumps will cavitate with water but not with coolant, more dense or something according to the repco guy.



"More dense?" The coolant or the Repco guy??


Sent from my backyard TeePee using smoke signals.

[bee utey]

A standard water pump is strictly mechanical. With no flow, so long as the impeller isn't loose and spinning on the shaft, then you have a blockage. Back flush the block with a hose into the top hose at the engine, disconnect the bottom hose off the pump. A handy fire pump/hydrant will improve the flush.

I have seen a badly maintained engine block up at the block/head interface at the rear of the engine. This engine was a write-off.

Perhaps a family of mice got in there and died.

[tebone]

Hi,
I have had this trouble before with my chev. The radiator was full and it wasn't pump any water through the system. My car is on lpg. I disconnected one of the heater hoses and inserted the garden hose in it, which bleed the system, until the water come out of the radiator cap.

[pfillery]

"More dense?" The coolant or the Repco guy??


Possibly both???

At least the Repco guys seem to know their stuff more than most of the Supercheap teenagers!