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Swing arm bolt seized


Guest petrolhead1989
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Hey guys. I know this is to do with a motor cross bike, but I'm stuck.

It's a honda crf 250..

The main long bolt that mounts the swing arm in place has seized

. And as I can't get it out, I cannot remove the engine, as it runs directly thru the rear of the engine.

It's a thread less bolt but it will not come out, even after hitting it as hard as I can with a hammer to push it through.


Cheers

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is there a bolt head you could put a socket on? if so i would try getting it to turn, lots of lubricant soaking in and torque wrench with a long leverage. if you can get it to turn you can get it out.

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It's a honda crf 250..

The main long bolt that mounts the swing arm in place has seized

Cheers

 

Take it to a workshop and get it pressed out, or...

Heat the area and hammer it out, or...

Soak it in lots of WD40 or similar and hit it hard, or...

Drill it and grind it out and fit a new one.

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it will be seized where the steel passes through the alloy of the crank cases they always do due to the reaction of the steel and alloy night mare job to do plenty of plus gas and also diesel sometiems helps in cases like this lay bike on its side so where the pivot bolt sits in it acts as a cup for the fluid to sit in and slowly soak into the bolt area

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Hi, drop the engine oil lay the bike on it's side and soak the seized bolt in plus gas or equivalent keep it well soaked. From what l've read they can be a nightmare to get out it might take a day or so to soak it through and still be one hell of a fight. Where steel passes through aluminium be sure to keep it well greased. Don't go crazy with the hammer l think that bolt passes through the rear of the engine casing. Patients my friend.

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cheers for all your post's guys


Sadly i left it laying on its side all night with basically quarter can of WD40 soaked into it..

Still nothing..


Ive battered it so hard with a steel rod and a hammer, than ive expanded the end of the bolt, so now mr grinder is needed :(


Ive sent it to work with my partners father today to get it pressed out.

Cant wait to get this done.


Can finally move on to the task in hand... Big end siezed :D

Too high compression from where it just been re-bored...


cheers

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cheers for all your post's guys


Sadly i left it laying on its side all night with basically quarter can of WD40 soaked into it..

Still nothing..


Ive battered it so hard with a steel rod and a hammer, than ive expanded the end of the bolt, so now mr grinder is needed :(


Ive sent it to work with my partners father today to get it pressed out.

Cant wait to get this done.


Can finally move on to the task in hand... Big end siezed :D

Too high compression from where it just been re-bored...


cheers

Hi ya WD40 is not really a releasing agent, here's some info that might be of use


http://www.v8register.net/subpages/tech ... penoil.htm

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