MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: jay1622 on June 18, 2016, 01:13:06 PM

Title: 1988 K75S Coolant from Weep Hole Question
Post by: jay1622 on June 18, 2016, 01:13:06 PM
Any chance of a coolant seal break-in?

On my fifth start-up post rebuild, but first time allowing the engine to get hot enough for the fan to engage, I ended up getting a few drops of coolant out of the weep hole. The oil/water pump portion of the rebuild went smoothly and I used the updated impeller, seals and stuff. The shaft of the impeller drive gear had signs of discoloration, but was in no way worn or pitted. If it was a low-fairingless K, I'd say screw it and see how bad it gets.

Thoughts?
Title: Re: 1988 K75S Coolant from Weep Hole Question
Post by: Martin on June 18, 2016, 05:15:28 PM
You still have a problem it's not going to fix it's self. Apparently they can be really finicky to repair. There are posts on the problem.
Regards Martin.
Title: Re: 1988 K75S Coolant from Weep Hole Question
Post by: F14CRAZY on July 09, 2016, 10:02:22 PM
I gave up trying to reseal my pump and installed a used K1200LT pump from eBay
Title: Re: 1988 K75S Coolant from Weep Hole Question
Post by: stokester on July 10, 2016, 04:39:05 PM
Any chance of a coolant seal break-in?

On my fifth start-up post rebuild, but first time allowing the engine to get hot enough for the fan to engage, I ended up getting a few drops of coolant out of the weep hole. The oil/water pump portion of the rebuild went smoothly and I used the updated impeller, seals and stuff. The shaft of the impeller drive gear had signs of discoloration, but was in no way worn or pitted. If it was a low-fairingless K, I'd say screw it and see how bad it gets.

Thoughts?
Is it leaking more or less than before?

I've mentioned my trials with a pump seal on this and other forums.  After two tries and then finding out that the updated ceramic seal requires a different sized spacer bushing than the original, I'm leak-free.
Title: Re: 1988 K75S Coolant from Weep Hole Question
Post by: jay1622 on July 12, 2016, 07:56:32 AM
No telling as the bike wasn't running when I bought it.

I installed a new shaft and went with another set of seals (oil and water). I believe I pushed (separated) the coolant seal on my last rebuild. Time will tell on this one.