Hi All,
I have just completed a valve job and water jacket plate overhaul (which originally started out as just a head gasket replacement). The engine now runs fine as we just completed about 8 hours of motoring with no problems and power is now restored due to the valve job. The water jacket plate bolts were very hard to seal but, after replacing one with a stud and re-seating three others with Permatex #2, instead of "Aviation Permatex", I have got the leaking somewhat under control but I guess I will never stop it completely.
The above paragraph is just for historical reference as the main reason for this thread is to explore a leaking water pump that is dripping water from the weep hole underneath. The pump is an MMI flange pump which I bought new from Moyer and have accumulated 80 hours on the pump. I don't know how long it has been leaking but from the corrosion on the pump and the mess below I guess it has been leaking for some time. I noticed the corrosion and mess on the lower block/oil pan while doing the valve job. Note that the pump is in a RWC seawater environment in So. California. I have spent so much money on this project that I am reluctance to drop another $50 on seals and shipping in order to rebuild the MMI pump. I have several questions regarding my situation as follows:
1. Is it reasonable to expect the MMI pump to last only 80 hours before requiring a rebuild?
2. I recently acquired a rebuilt unused Oberdorfer pump that I could swap for the MMI pump---is this pump as good as the MMI?
3. The rebuilt Oberdorfer pump referenced in the question above has a Zerk grease fitting instead of the grease cup commonly installed on these pumps. So my question--how do you handle greasing the pump with a Zerk fitting as access is limited--maybe some sort of remote but permanent flexible hose??
4. I have several grease cup fittings that I could use instead of the installed Zerk fittings but which system is better--the Zerk setup or the grease cup?
5. How often will I have to attend to the grease cup or Zerk arrangement in order to keep the Oberdorfer pump properly greased? The MMI pump does not require greasing but maybe that is why it failed so soon?
Any help/comments would be greatly appreciated.
Thanks.
Bruce
I have just completed a valve job and water jacket plate overhaul (which originally started out as just a head gasket replacement). The engine now runs fine as we just completed about 8 hours of motoring with no problems and power is now restored due to the valve job. The water jacket plate bolts were very hard to seal but, after replacing one with a stud and re-seating three others with Permatex #2, instead of "Aviation Permatex", I have got the leaking somewhat under control but I guess I will never stop it completely.
The above paragraph is just for historical reference as the main reason for this thread is to explore a leaking water pump that is dripping water from the weep hole underneath. The pump is an MMI flange pump which I bought new from Moyer and have accumulated 80 hours on the pump. I don't know how long it has been leaking but from the corrosion on the pump and the mess below I guess it has been leaking for some time. I noticed the corrosion and mess on the lower block/oil pan while doing the valve job. Note that the pump is in a RWC seawater environment in So. California. I have spent so much money on this project that I am reluctance to drop another $50 on seals and shipping in order to rebuild the MMI pump. I have several questions regarding my situation as follows:
1. Is it reasonable to expect the MMI pump to last only 80 hours before requiring a rebuild?
2. I recently acquired a rebuilt unused Oberdorfer pump that I could swap for the MMI pump---is this pump as good as the MMI?
3. The rebuilt Oberdorfer pump referenced in the question above has a Zerk grease fitting instead of the grease cup commonly installed on these pumps. So my question--how do you handle greasing the pump with a Zerk fitting as access is limited--maybe some sort of remote but permanent flexible hose??
4. I have several grease cup fittings that I could use instead of the installed Zerk fittings but which system is better--the Zerk setup or the grease cup?
5. How often will I have to attend to the grease cup or Zerk arrangement in order to keep the Oberdorfer pump properly greased? The MMI pump does not require greasing but maybe that is why it failed so soon?
Any help/comments would be greatly appreciated.
Thanks.
Bruce
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