Tpdingo
Member
Ok, if you were trying to torque down an engine bolt and you didn't have any other way of locking down the shaft, could you put water into the cylinder and purposely hydrolock it to make the shaft not turn?
Absolutely crazy idea
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anickode
Active member
I wouldn't recommend it. It would leak past the rings and get in your oil for sure. Motor oil would be much better.
Tightening that bolt would be applying torque to the engine backwards, so you'd want to turn the engine to the bottom of the power stroke before putting the oil in. When turning the engine backwards, the power stroke is the only spot you'll have an upward moving Piston with closed valves. You definitely don't want to end up on the intake stroke, turning backwards, and blow oil through your carburetor.
You'd be better off removing the recoil starter and putting a long screwdriver through the notches in the starter cup.
Or buy a strap wrench. They aren't that expensive.
One thing I've done before is the old remove the head, stuff a rag in the cylinder, and put the head back on trick. Although that method is a little more practical when you're assembling an engine.
Or just give it one ugga-dugga with an impact...
65ShelbyClone
Active member
That would do it, yes, but how are you going to get (all) the water out before it corrodes the cylinder, rings, and/or valves? Depending on the force applied to the fastener and the angle of the connecting rod, it could also damage parts.
https://en.wikipedia.org/wiki/Hydrolock
https://en.wikipedia.org/wiki/Hydrolock
saved the best for last huh?
That, exactly that and nothing more is really needed..
if you lack an impact wrench get a wrecnch on it and slap the handle down with a rubber mallet... same idea
(a drop of loctite for additional security in case you're not trusting the such tightened bolt doesn't harm)
'sid
Panhead5496
New member
I usually put my socket wrench on the bolt and just whack it with a hammer a few times. The sudden impact from the hammer makes it tighten down nicely! If you use an impact wrench make sure you don't over tighten!!
anickode
Active member
mckutzy
Well-known member
Get a hub or sprocket that matches the shaft OD, and weld a bar onto that to hold the shaft steady....
Or get one of these....
https://www.ezbore.net/Crank-Lock-p/ept99049.htm
Now.... I feel somewhat ashamed to mention this... as this came from the opposing faction....But ill link it here... as it was a good thread, describing these tools and being made...
https://www.oldminibikes.com/forum/honda-clone-predator/137394-crankshaft-holder-4.html
Or get one of these....
https://www.ezbore.net/Crank-Lock-p/ept99049.htm
Now.... I feel somewhat ashamed to mention this... as this came from the opposing faction....But ill link it here... as it was a good thread, describing these tools and being made...
https://www.oldminibikes.com/forum/honda-clone-predator/137394-crankshaft-holder-4.html
Panhead5496
New member
Yeah I know what an impact wrench is haha...
It's just way easier to keep pulling an impact trigger thinking you are making something good and tight when you are actually over tightening and stripped/warping things. The socket/hammer method is harder to over tighten stuff with.
TL;DR be careful not to overtighten with an impact wrench lol
bob58o
SuckSqueezeBangBlow
One of my favorite purchases from Harbor Freight. Best $50 I spent (excluding the back pages, LOL)
https://www.harborfreight.com/12-in-heavy-duty-electric-impact-wrench-68099.html
https://www.harborfreight.com/12-in-heavy-duty-electric-impact-wrench-68099.html
This is the easiest way. Just don't use nylon rope.
Tpdingo
Member
Why not?
mckutzy
Well-known member
If a piece of filiment flakes off inside the cylinder... It could get wedged inbetween the piston an wall... Also it'll melt and produce a carbon pellet that can cause further damage.. Cotton or natural material just burn up and vacated as exhaust...
J.S.@SMS
Road Hazard
I usually use an old un-usable TC stationary plate with holes that I drilled in it which match the engines clutch mounting pattern.
Tpdingo
Member
That seems like the best option. Then the block is holding the shaft and not the rod, even though the rod should be able to handle it. It could also probably be done with a centrifugal clutch too.
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