Hey guys - well, I had a leak from the fresh-water pump seal and had started a thread about possibly using an alternative parts source instead of genuine yanmar part. see thread at: yanmar parts alternative
I did wait for the actual yanmar part supplier and replaced with the genuine thing.
Now I have another leak which appears this time to be coming from the O-ring section at the base of the pump. See the attached pic, there's a section of the pump which is like a pipe that slips into the engine block and has an O-ring on it for a seal. In my thoughts, that's not an optimal design, as the other mating ports can be sealed tightly by the bolts holding this on and the gasket with RTV silicone on the gasket. I don't think tightening the water pump beyond the torque specs would help the O-ring seal.
I made sure the surface inside the block the O-ring seals against was clean and lubed the ring with teflon lube before inserting.
It's not leaking much, like 1/2 teaspoon per 45min run...but it's annoying.
I don't think leaks like this tend to just "go away" on their own - do you think differently? I guess I can take the whole thing out again and this time re-install the pump with the O-ring coated with RTV silicone too.
Any other thoughts?
Thanks for any insight - Dave in Charlotte Harbor
I did wait for the actual yanmar part supplier and replaced with the genuine thing.
Now I have another leak which appears this time to be coming from the O-ring section at the base of the pump. See the attached pic, there's a section of the pump which is like a pipe that slips into the engine block and has an O-ring on it for a seal. In my thoughts, that's not an optimal design, as the other mating ports can be sealed tightly by the bolts holding this on and the gasket with RTV silicone on the gasket. I don't think tightening the water pump beyond the torque specs would help the O-ring seal.
I made sure the surface inside the block the O-ring seals against was clean and lubed the ring with teflon lube before inserting.
It's not leaking much, like 1/2 teaspoon per 45min run...but it's annoying.
I don't think leaks like this tend to just "go away" on their own - do you think differently? I guess I can take the whole thing out again and this time re-install the pump with the O-ring coated with RTV silicone too.
Any other thoughts?
Thanks for any insight - Dave in Charlotte Harbor
Attachments
-
443.9 KB Views: 144