My 1975 A4 (in a Ranger 33) was running pretty quietly (and well) when I discovered the water pump grease cup was a mass of corrosion and the pump was in rough condition (drain plug corroded, grease cup thread stripped, etc), so I bought the replacement that doesn't use a grease cup (and includes the quick access to the impeller).
Anyway, after installing the new pump, the engine immediately began 'tapping' (like a poorly adjusted valve, except louder). Water circulation is fine. I'll need to apply a stethoscope to make sure where the tapping is coming from (it's a pretty noisy object in a pretty small space!), but the boat is 75 miles away. I let the engine run about 15 minutes and the noise didn't change.
The 'kit' came with a small ziplock of blue grease, with no indication of what it was for.
Is there a chance that the slotted shaft connection needed grease? The old pump was dry there, but it was probably well worn into compliance. I trusted the 3/8 mounting bolts to provide any alignment - could the shaft connection be slightly out of symmetry and the noise will go away with some running time?
I made no other changes/adjustments to the engine, except to replace the pump to block water hose.
Anyway, after installing the new pump, the engine immediately began 'tapping' (like a poorly adjusted valve, except louder). Water circulation is fine. I'll need to apply a stethoscope to make sure where the tapping is coming from (it's a pretty noisy object in a pretty small space!), but the boat is 75 miles away. I let the engine run about 15 minutes and the noise didn't change.
The 'kit' came with a small ziplock of blue grease, with no indication of what it was for.
Is there a chance that the slotted shaft connection needed grease? The old pump was dry there, but it was probably well worn into compliance. I trusted the 3/8 mounting bolts to provide any alignment - could the shaft connection be slightly out of symmetry and the noise will go away with some running time?
I made no other changes/adjustments to the engine, except to replace the pump to block water hose.
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