MC 54 250B with 244c engine 2008 build - water pump By bobf (Read 692 times)

[bobf]

I have had water dripping from the weep hole under neath the pump so I decided to replace the seals inside the pump. Ordered some and put them in yesterday. But now it is like pouring water in the inlet pipe and watching it all run out the bottom. No slow down at all.

So what is the problem?

I ordered the following parts from "Partsforchinesescooters.com".

Items 2528 and 2529

www.partsforchinesescooters.com

For some reason I could not get an image to copy and paste here. Link to the page, type in 'water pump seals', and see the items I selected. They do look much like what I pulled out but now are worse than before.

[Alleyoop]

They appear to be the right seals.
Was there a gasket that goes over the shaft and part of the pump?
Are you sure you put the seals in right? Don't know what to tell you, you must of done something wrong if it leaks that bad.
Maybe you installed one or both of the seals backwards!
The seal on the water pump the white part faces out, also the other seal that is spring loaded that goes on the shaft the indented part faces out.
Alleyoop

[bobf]

Well, as far as I can tell I put things back in the way you described. There was one other smaller seal that could not be put on the shaft after the first step. I don't remember one in there prior.

I dug out the leaking ones and have ordered a new set. Should be here this coming weekend. Will see what I get this time. And be more careful when installing. Maybe I did not have it seated properly in the motor part.

[Alleyoop]

The Smaller seal goes on the impeller behind the Seal with the white facing out then the impeller fits over the shaft against the other seal which has a spring on it. You will see an outline of where the smaller seal goes.

[bobf]

The smaller seal they sent me is 3/8ID X 3/4OD x 3/16 thick. No room for that in my impeller as the large seal with the white face is 1/2id x 7/8od x 3/16 thick. One or the other but not both.

[Alleyoop]

Could be the Crank OIL seal which you probably did not take the old one out which is behind the SPRING LOADED SEAL.
Is that other seal made just of rubber and on one side it has like a channel around it? If so that is the oil Seal.
Alleyoop

[bobf]

Yes, you have described it to me. Pretty much rubber and flat on the one side and grooved on the other side.

[Alleyoop]

Hey Bob, I just found a VIDEO on replacing the seals and on the HELIX water pump!! This will help you a lot I will also add the VIDEO to tech section for future folks.
Alleyoop

[bobf]

Thanks for the film Alleyoop. That sure clears up a couple things for me. One important one is the sealer. While cleaning the seal area this morning I found stuff scraping off the casting in that area and was going to ask about it. He said RTV Sealant, so tomorrow I will go to the auto store and buy some. He did not say what type but I am sure the auto store folks will know.

Now on the oil seal he did show how to remove and replace it. But for my engine with only 240 miles on it should I really bother to replace the seal at this time? And would my oil be messed up with all this water leaking I have had. I suppose an oil change would not be such a problem, just wondering if my oil got full of water.

And thanks again for this film. I apparently did nothing wrong while getting my seals out.

[Alleyoop]

Glad I was able to help you get that scoot up and running.

Check your oil and see if it has water in it if not then you get away without changing the oil seal.