Stuck valve covers (chang jiang)

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Orgoth225
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Stuck valve covers (chang jiang)

Post by Orgoth225 » Mon Oct 31, 2016 6:46 pm

Ok, I have checked the spark, cleaned the carburetors, and made sure the timing is good on my chang. The bike still only want to start once in a blue moon. The times it does work there is no power. At this point I am going to make a guess that my valves probably need adjustment. The issue however being that the screws had been last screwed to the point of them being stripped and stuck. There is still some thread for the driver to fit but I have sprayed everything from wd40 to pb blaster with no luck of getting it loose. Any suggestions on getting these things off withiout destroying my engine?

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brianural
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Re: Stuck valve covers (chang jiang)

Post by brianural » Mon Oct 31, 2016 6:49 pm

maybe some heat, use a small propane torch and heat them up. Saw a video the other day of a guy using candle w@*, melted into the threads. Good luck
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Re: Stuck valve covers (chang jiang)

Post by dneprlover » Mon Oct 31, 2016 7:12 pm

I presume a sidevalve
Last edited by dneprlover on Sat Jan 28, 2017 6:39 pm, edited 1 time in total.
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Snakeoil
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Re: Stuck valve covers (chang jiang)

Post by Snakeoil » Tue Nov 01, 2016 10:26 am

Doubtful that Loctite would hold up under flathead temps. But they may have used a hi-temp product.

DL suggestions are all good stuff. To tag on to those, go to Harbo Freight nad get a hand impact wrench. No bike shop should be without one. That should break them free if anything will.

I'm not personally familiar with these engines. But can you not simply drill the heads off the screws to remove the covers and then remove the remaining stubs of the screws with pliers?
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Rob
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Lmo
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Re: Stuck valve covers (chang jiang)

Post by Lmo » Tue Nov 01, 2016 12:45 pm

The tool mentioned is called an "Impact Driver". The benefit of the tool is that as you strike it, it twists the screw simultaneously. I bought my Vessel in 1967 when I started working in a Honda shop. About $50 now I think. $$$ well spent.

Image
Heat is then a more forcefull method which can be tried.
I've found that a 150W electric soldering iron does a pretty good job, without the open flame issue. Puts the heat exactly where you want it without substantially heating everything around it.
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Re: Stuck valve covers (chang jiang)

Post by rivers » Tue Nov 01, 2016 1:22 pm

Snakeoil wrote: get a hand impact wrench. No bike shop should be without one.
+10 A MUST HAVE tool. Stuck, rusted, corroded bolts respond much better to quick impact/shock loads rather than to progressively increased torque. The slot in the bolt head usually goes south before the threads break free. Any auto parts store should carry them. Even the cheap China ones work and hold up a long time.
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Re: Stuck valve covers (chang jiang)

Post by immulmen » Tue Nov 01, 2016 1:42 pm

Is this a flathead or OHV???????????????????
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Re: Stuck valve covers (chang jiang)

Post by gobium » Tue Nov 01, 2016 3:16 pm

immulmen wrote:Is this a flathead or OHV???????????????????
I bet it is flathead

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Re: Stuck valve covers (chang jiang)

Post by Lmo » Tue Nov 01, 2016 3:37 pm

OHV socket head ??? :P :?
Lew Morris
Dnepr w/ '06 Ural Drive Train
C5 Power Arc
125/42 jets
Drilled slides/
.030" shims

1973 BMW R75/5 (original owner)
1947 HD FL (long gone, forever regretful)

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Re: Stuck valve covers (chang jiang)

Post by dneprlover » Tue Nov 01, 2016 4:32 pm

Lmo wrote:OHV socket head ??? :P :?
It''s a post 86. 12v Flathead with an electric boot.
Last edited by dneprlover on Sat Jan 28, 2017 10:09 pm, edited 1 time in total.
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Re: Stuck valve covers (chang jiang)

Post by Snakeoil » Tue Nov 01, 2016 7:39 pm

The tool mentioned is called an "Impact Driver".
Yes, thanks for correcting me. For some reason, I started calling it a "wrench" and have no idea why. Gray hair I guess. :feelsgood:

The Horror Fright versions are quite good. The bits tend to be glass hard. But they are lifetime guarantee. Save your receipt. I think I've gotten at least 3 new ones over the years, just because the bits broke.

I still have the first one I bought, way before the internet, from JC Whitney. This was when you clipped out the ordering form and mailed it in with your check. Same tin box as your Vessel. I don't think I ever destroyed any of the bits. Deformed a few, but never shattered any. You can get replacement bits at places like NAPA. But they cost more than the tool and bits from HF.
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Rob
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2000 Ural Tourist
40 Pilots, 122 Mains
Before you say something stupid, always ask yourself, "What would Harpo say?".

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