Coolant Drain Bolt Threads Stripped - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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\ From the radiator, through the case and out
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post #1 of 11 (permalink) Old 08-12-2017, 02:37 PM Thread Starter
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Coolant Drain Bolt Threads Stripped

So this weekend I'm trying to tackle everything that's wrong with my bike. PO really messed this bike up. I noticed a leak at the coolant drain bolt, and saw that the bolt wasn't tightened all the way in. So I went to tighten the bolt and coolant began to seep out fast. I ended up just taking out the bolt, draining out the coolant, and see that the female threads are stripped. Not too sure what I should do about this.

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post #2 of 11 (permalink) Old 08-12-2017, 02:38 PM Thread Starter
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Picture for reference as to the bolt I am talking about.

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post #3 of 11 (permalink) Old 08-12-2017, 02:45 PM Thread Starter
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http://imgur.com/a/YMett

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post #4 of 11 (permalink) Old 08-12-2017, 03:34 PM
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Not sure if that's metal or plastic there. If it happens to be brass, you might re-tap it larger, use a larger bolt. I thought all the radiator drain bolts were plastic. ??? But I know some have broken those and replaced with metal.

First thought is JB Weld the bolt back in and drain it from the hose in the future.

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post #5 of 11 (permalink) Old 08-12-2017, 04:00 PM
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Hey, It's not magnetic, aluminum, or plastic, X2 re-tap, or JB weld and disconnect the hose to drain. I was lucky my drain plug was plastic, I was able to just replace the plastic plug. Maybe you can use teflon tape or get a new plug, and use teflon tap. Sparkys73150

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post #6 of 11 (permalink) Old 08-12-2017, 04:16 PM Thread Starter
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Can I just fill the hole with JB weld?

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post #7 of 11 (permalink) Old 08-12-2017, 04:46 PM
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Quote:
Originally Posted by Vulcan757 View Post
Can I just fill the hole with JB weld?
Not sure, that might work, but I feel it would have a better chance of hanging on with the bolt in there. A large wad of JB may not cure well or hold as well. I'd go with the 24 hour formula, not the JB Quick. (15min)

One thing, it all has to be absolutely clean. I would clean it with acetone, paint thinner, turpentine, something like that.

I used JB to glue chunks back into the crankcase on a quad, the was in the 80s and it's still holding.

You do want to be sure it's holding, running over all that antifreeze would not be fun.

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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #8 of 11 (permalink) Old 08-12-2017, 04:51 PM Thread Starter
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Thanks Sprockster!

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post #9 of 11 (permalink) Old 08-12-2017, 05:00 PM
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Quote:
Originally Posted by Vulcan757 View Post
Thanks Sprockster!
You're welcome .....

If the threaded fitting in the radiator is metal, I would seriously consider re-tapping it.

The thought of a bike releasing it's fluids on the road concerns me, already been down because of that. I was wrapped up like King Tut for a while.
OleDirtyDoc and Vulcan757 like this.

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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #10 of 11 (permalink) Old 08-13-2017, 08:04 AM
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Garage
I got a used radiator in good shape $20 plus shipping.i got paypal.
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