Coolant pipe leak... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 04-14-2007, 02:57 AM Thread Starter
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Coolant pipe leak...

Okay, I did end up with a leak after my stator rebuild. I'm not as good as I though I was! Anyway, the rear cylinders coolant pipe popped out during the engine pull. I thought it would be alright to just pop it back in and tighten the clamp bolt. didn't really see a leak till my run to the local shop today to pick up new turn signals, (dry rotted old ones). While there I decided to invest in trun signal conversions, (see electrical if interested).

Anyway back to the leak. I squeaked the pipe out and realized it had a rubber O ring. Trying to do a quick fix I grabbed a handy tube of black RTV and put it around the pipe just above the O ring. Refitted it and went about my turn signal replacement/mod. Finally finished up after dark. Decided what the hay, took a ride to check out how the mod went and if the RTV sealed the leak. Seems to have done the trick.

I'm no where near a shade tree mechanic, (just now learning to tinker). So I ask, does anyone know if I should be worried about using the RTV to seal a coolant pipe fitting? TIA
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post #2 of 5 (permalink) Old 04-14-2007, 08:38 AM
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I've used RTV on the inside of radiator hoses for years and have never had any problems. It really helps on an old rusted radiator. I would replace the o-ring the next time you have it apart but wouldn't worry about it for now.
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post #3 of 5 (permalink) Old 04-14-2007, 08:33 PM
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I bought new orings from bikebandit for like $4/ea. Worth the investment after all the other costs and time.

Mine were completely dry rotted and were leaking prior to the engine pull.


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post #4 of 5 (permalink) Old 04-14-2007, 10:17 PM
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i suggest the same, replace it when you can. which rtv did yo use... if you used the black oil resistant stuff, it wont last as long against radiator fluid and pressures as the other stuff... but should last at least the riding season if not more

'04 Vn750
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post #5 of 5 (permalink) Old 04-15-2007, 08:25 AM Thread Starter
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I had red, and almost used it. I however was a dummy and worried about how the red would look squeezing out the top of the pipe. So I used black. I will find the part number for the ring/seal and order one. I'll replace it at the first sign of trouble or whenever I am doing any other more than minor service. If it weren't in such a difficult place I would do it right away. No trouble yet and more than 200 miles since I "fixed" it.

Thanks everyone for the input/info. I'm glad this place is here.
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