Coolant leak - Hex plug ???

[Peder_y2k]

Slow leak developed at this hex plug. What fix?

Is it an o-ring, or a crush washer seal? Lower right side gen1 slightly below and to the rear of the water pump.

-Pete, in Tacoma WA USA

[dingy]

The hex plug on the bottom of water pump is coolant drain. Probably needs washer replaced.

If it is plug going into block, it is an oil galley shutoff. This one has an allen head socket.

Gary

[MiCarl]

The plug you circled doesn't have coolant behind it. The coolant is coming from somewhere else and running there.

 

You made me go look at mine, and I have a drip on the water pump drain plug. Of course I just put in my parts order this morning. The water pump drain plug is about 3" forward, above and outboard of what you have circled. It's 19mm hex head. You can probably get a crush washer that fits it at the auto parts store.

[Peder_y2k]

I'll be darned, on closer inspection the coolant is exiting the water pump weep hole. This leak is minor (3-4 drops) and occurs only when the bike has been shut off after being thoroughly warmed up. As it cools down, leak stops.

Comments?

-Pete, in Tacoma WA USA

[MiCarl]

Mechanical seal on the water pump is failing. Time to replace it.

[Peder_y2k]

11H-12438-00-00

SEAL, MECHANICAL

11H-12438-00-00

SEAL, MECHANICAL

11H-12438-00-00 SEAL, MECHANICAL is shown as "Part Obsolete", but on google search I find same part number assigned to other bikes/ATV's still available for around $25.00. Would it be safe to assume this is same part for my '88VR?

-Pete, in Tacoma WA USA

[MiCarl]

It is obsolete because it's been updated. New part number is: 11H-12438-10-00

 

You will also need 3JP-12449-02-0 GASKET, WATER PUMP.

[Peder_y2k]

Thanks Carl....

I'll check it out.

-Pete, in Tacoma WA USA....where it is 49'F. calm, and clear, visibility 10 miles

Edited November 28, 2013 by Peder_y2k
spell

[Peder_y2k]

Found this thread and will use it as a repair guide.

-Pete, in Tacoma WA USA

 

 

 

http://www.venturerider.org/forum/showthread.php?t=67565

[GeorgeS]

I would try changing coolant, drain at bottom plug. Do a good flush.

I use the Orange stuff. Maby add a small amount of leak stop. ( very small )

 

Run the bike, it might stop leaking. Worth a try before ripping and tearing.

[Peder_y2k]

New coolant 4 months ago. Will consider stop leak experiment.

Thanks George

-Pete, in Tacoma WA USA