tnrider
Moped
I read the posts and Tech pages on replacing the water pump since mine began leaking oil. I did try to remove the new seal to apply the red Loctite but was afraid of tearing it up to get it out. Opinions varied on whether to take it out to apply the Loctite or apply it on the seal without removing it. I did not apply any red Loctite on the seal. Installed the new water pump. A small oil leak was noted on the kickstand. I hoped that it was just extra oil but of course that was not the case.
Removed the new water pump and seal. Found oil behind the seal (picture). The seal looked like it was pushed in good but apparently not. I had ordered a new seal, O-ring and gasket ahead of time to possibly repair the old pump (old pump bearings were catching so not an option). So I used these new seals and O-rings just in case and applied the red Loctite after making sure the seal was pushed all of the way in.
As a side note, I recommend draining the oil as well as the antifreeze prior to water pump removal. I know that some people say draining the oil is not necessary but in my case it flowed rapidly onto my garage floor (and I only used 3 quarts during oil and filter change).
Pictures: #1 old water pump oil leak
#2 oil crud in new water pump after I removed the seal for inspection
#3 new seal installed in new water pump
Removed the new water pump and seal. Found oil behind the seal (picture). The seal looked like it was pushed in good but apparently not. I had ordered a new seal, O-ring and gasket ahead of time to possibly repair the old pump (old pump bearings were catching so not an option). So I used these new seals and O-rings just in case and applied the red Loctite after making sure the seal was pushed all of the way in.
As a side note, I recommend draining the oil as well as the antifreeze prior to water pump removal. I know that some people say draining the oil is not necessary but in my case it flowed rapidly onto my garage floor (and I only used 3 quarts during oil and filter change).
Pictures: #1 old water pump oil leak
#2 oil crud in new water pump after I removed the seal for inspection
#3 new seal installed in new water pump