QD 24 lower block corrosion

[stanley]

Is there any reason for significant corrosion where the O ring on the lower crankshaft bearing seats (groove in crankcase) other than a leaky base gasket?

[frankr]

Water in crankcase (is the bearing rusted).  Water coming up from drive shaft isolation tube (are the parts present on top of water pump)

[stanley]

Thanks Frank,bearing is fine the corrosion was just in the o ring groove.Before I re-install the powerhead I was going to change impeller so I’ll check for leak potential there.

[fleetwin]

I’m not sure I understand just where this corrosion is, perhaps you can post a picture…

[stanley]

The roller bearing on the bottom of crankshaft has an O ring around it that fits in a groove in the crankcase.The corrosion was in that groove.The block has been reassembled  so no picture possible. I replaced impeller and nothing in that area was missing or needing to be replaced.No signs of water in cylinders or crankcase.

[fleetwin]

wonder if it was some sort of casting defect

[Author]

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