Maintenance & Technical > KX500 Original
Why does my head continue to weep coolant through the studs
2001KX5:
The heli coils are not backing out. I had them installed and I have the cylinder decked. Some were not perfectly straight but it don't really cause any issues other than having to watch what I'm doing when I put the head down.
I have tried lock tight before but I found that it more or less could not stand up to the heat. Perhaps I was using old lock tight or a cheap version.
This doesn't happen right away but after running it for a while it may tend to weep.
I love my kx500 thats why its so frustrating. I rode a cr250 the weekend and it was like riding a honda 50 compared to the 500. I jusy love the power and I don't think I cold ever go back. Unless these issues really piss me off. But at that point I'd prob go go buy and new complete top end and sell my current one.
hughes:
Use the red loctite 271 it hold up to heat.
Polar-Bus:
--- Quote from: 2001KX5 on June 09, 2006, 01:44:47 AM --- Some were not perfectly straight but it don't really cause any issues other than having to watch what I'm doing when I put the head down.
--- End quote ---
So you are saying some of your heli-coils are threaded in crooked? This means your studs are crooked, which means your stud nut is not properly seating in the head, and "if" coolant is designed to pass into the head's stud holes, there is your weep. I can't comment for sure, as I have not yet closely seen a KX5 head. Plus its very hard to internet diagnose these types of problems without actually looking right at your engine. I've had 5 KX's in the past 20 years and never seen one weep past a cyl. stud
hughes:
Some were not perfectly straight but it don't really cause any issues other than having to watch what I'm doing when I put the head down.
Good catch on that one Polar Bus
2001KX5:
There is no way the coolant system flows through the stud holes in the head. I'm almost positive that the leaking is coming from the studs backing off or vibrating out for what ever reason. This causes a loss of claming force between the cylinder and the head just slightly, but it is enough for it to flow the easiest route out which is through the head studd once it becomes slack.
In any event I'll see how it works out this evening once I get her out for a run. I ran her up last night to operating temp and its fine.
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