Oil Pump leaking on rebuilt 1500
Posted: Mon Jul 15, 2019 5:04 pm
Guys,
I am putting the finishing touches on my factory original 3 piece 1500 N engine # P 35039 which will be reunited with my 1955 Continental Coupe. The engine is on a test stand and after running it for a time, I noticed an oil leak dripping from the oil pump housing. This is the "small" oil pump. I had installed the pump with a gasket and a sealer before the test run. After finding the leak, I removed the pump cleaned the surfaces and re-installed the pump using a new gasket and a different sealer...Permatex Grey (a silicone based sealer). This time, the oil did not leak from around the housing but instead leaked from the tack drive shaft opening....a steady drip. Everything else seemed to be leak free.
I have removed the oil pump housing again and removed the tack drive after cutting the safety wire and removing the plug. There is a tack drive oil seal....I have ordered a new one from Stoddard....and a seal ring under the plug....I have also ordered a new seal ring. I also ordered new gaskets (more than one). When they arrive, I will be ready to re-install the oil pump housing again.
I am confused about a few things.
1. Should I mount the oil pump with or without a sealer on the new gasket?
2. There is a small hole on the under side of the housing which leads to the tack drive shaft. What is the purpose of this small hole and should I be careful not to obstruct it with sealer?
3. On the third piece, under the oil pump housing, there is a groove in the surface of the 3rd piece which circumnavigates the entire area under the housing. This groove ultimately leads to the opening where the pump gears are located and the groove seems to line up with the small hole I mentioned in question #2. Does this groove need to be unobstructed so oil can flow?
4. On the oil pump housing, there are two holes, top and bottom, which have threads inside. What is the purpose of these threaded holes?
5. If I use sealer when I mount the oil pump, what type of sealer should I use and how would you suggest I apply the sealer?
Any other thoughts or suggestions would be appreciated.
Tom Sansone
Elk Grove, Ca.
I am putting the finishing touches on my factory original 3 piece 1500 N engine # P 35039 which will be reunited with my 1955 Continental Coupe. The engine is on a test stand and after running it for a time, I noticed an oil leak dripping from the oil pump housing. This is the "small" oil pump. I had installed the pump with a gasket and a sealer before the test run. After finding the leak, I removed the pump cleaned the surfaces and re-installed the pump using a new gasket and a different sealer...Permatex Grey (a silicone based sealer). This time, the oil did not leak from around the housing but instead leaked from the tack drive shaft opening....a steady drip. Everything else seemed to be leak free.
I have removed the oil pump housing again and removed the tack drive after cutting the safety wire and removing the plug. There is a tack drive oil seal....I have ordered a new one from Stoddard....and a seal ring under the plug....I have also ordered a new seal ring. I also ordered new gaskets (more than one). When they arrive, I will be ready to re-install the oil pump housing again.
I am confused about a few things.
1. Should I mount the oil pump with or without a sealer on the new gasket?
2. There is a small hole on the under side of the housing which leads to the tack drive shaft. What is the purpose of this small hole and should I be careful not to obstruct it with sealer?
3. On the third piece, under the oil pump housing, there is a groove in the surface of the 3rd piece which circumnavigates the entire area under the housing. This groove ultimately leads to the opening where the pump gears are located and the groove seems to line up with the small hole I mentioned in question #2. Does this groove need to be unobstructed so oil can flow?
4. On the oil pump housing, there are two holes, top and bottom, which have threads inside. What is the purpose of these threaded holes?
5. If I use sealer when I mount the oil pump, what type of sealer should I use and how would you suggest I apply the sealer?
Any other thoughts or suggestions would be appreciated.
Tom Sansone
Elk Grove, Ca.