Water pump replacement questions

[MaconMan77]

My 03 ST1300 with 47k has developed a leak from the round weep hole and will need a water pump. It appears to be a mix of oil and coolant. PO had it done about 2 years ago.



At it's age and mileage, would it be wise to get clutch plates and/or springs? If so, what other parts would I need?

 

[970mike]

I just replaced my water pump for the second time in 235,000 miles. On the second water pump rebuild I decided to replace the clutch plates and springs. When I tore it down and measured the plates and springs the only thing out of spec was the springs. I replaced all of it as I was in there.

Your clutch maybe OK or not with your low mileage. I would have the plates and springs on hand when doing the water pump.

 

[ST-Traveler]

Great question.
I really doubt you will need clutch plates. Some may disagree, but I changed my clutch plates and springs at 132,xxx miles and there was almost no wear on them at all. Save your money for later.

2 years between water pump replacements seems excessive to me..

 

[MaconMan77]

I agree, but it's obviously actively leaking.

 

[MaconMan77]

I'm a Honda auto mechanic by trade. Yeah, it's a doozy of a job, but I'm confident and know when to seek help.

 

[Josh_ST]

Based on a lot of threads on here surrounding coolant issues, you may only have a leaking hose at a joint, seems to be a very common issue on the ST's. Seems like the recommendation is to use a different style of hose clamp. This article covers some of the leak/seep visual cues:

Article [13] - ST1300 - Water Pump Weep Holes | ST1300 Articles

There are two 'weep holes' on a ST 1300 motorcycle. They serve entirely different purposes and have nothing to do with each other. Because the two outlets (the "round hole" and the "square hole") are located very close together, this sometimes causes confusion. I'm not sure which hole you are...

www.st-owners.com

Josh

 

[cjames431]

It's not overly complicated. A mallet works well for knocking bits out and then a bit of soft scotch brite to clean up the surfaces. Ensure everything is cleaned with alcohol during assembly. Ensure proper stem protrusion for the impeller and reassemble.