Removing stud bolt from cylinder

[JamSund]

Hey Riders!

I have a - 91 kdx 200. In parts at the moment, gonna do a full renovation. One thing at a time.

Now it's the cylinder that need a new "plate" gonna send it to a place that does that but they told me to remove everything from the cylinder.

Tried to remove the stud bolt with 2 nuts opposite.
And nothing. They are removable right.
Any suggestions?

Gonna put the whole cylinder in a diesel bath first and try if the come loose easier.

Best regards from Sweden / Arvid

[bufftester]

Some penetrating oil and heat

[KDXGarage]

Skip the diesel fuel.

As mentioned, penetrating oil and/or heat.

[JamSund]

Ahh. Thanks. Ofc sounds logical.

[pumpguy]

Published studies have shown a 50/50 mix of ATF and Acetone is a much more effective penetrating oil than many of the touted commercial brands like P B Blaster or Kroil. This ATF / Acetone mixture causes a chemical reaction to take place that loosens the bond.

I don't remember the details but some online searching will provide more information.

[bufftester]

This one has been around for awhile. Some folks say using more acetone for smaller fasteners helps as well. You do have to mix it well since acetone is polar and they won't mix well without a lot of agitation.

[pumpguy]

First time I tried this, I had some Acetone on hand but no ATF. I dumped some Acetone in a partly used plastic bottle of Liquid Wrench and squirted some on the nut. This worked too, but about a day later, the plastic bottle started to dissolve.

Not sure about grades of plastic, but probably best to use a small metal oil can.

[KDXGarage]

Those studs were installed in the spring or summer of 1990. It is now fall of 2022. They have been through a lot of heat cycles. Time to heat cycle the aluminum cylinder so the steel studs do not pull the threads out, damaging the aluminum cylinder.

[bufftester]

Those studs were installed in the spring or summer of 1990. It is now fall of 2022. They have been through a lot of heat cycles. Time to heat cycle the aluminum cylinder so the steel studs do not pull the threads out, damaging the aluminum cylinder.

+1 Exactly, this is why you use heat on this job