Topic: Help with motor bolt! ** 75 CB550F **

[Zaipai]

Hi all, I can not get the bolt circled in yellow to come out, its the only thing keeping me from getting out the motor. That dang bolt moves freely, I tried using a sledge hammer but it did not budge. I also tried heat no luck. All the time hitting it with WD-40 cause thats all I have atm.. I did notice that the spacer moves with the bolt and I tried to hold on to the spacer with a pair of pliers and I was unable to keep it from turning. So is that collar threaded or is it just rusted..?

[d3buttz]

no, the bolt is only threaded on the end, have you tried to rotate it with a wrench while hitting it? that might get it to break it loose.

[BlindJoe]

collar isn't threaded just rusted, u could try atf acetone mix

[Zaipai]

no, the bolt is only threaded on the end, have you tried to rotate it with a wrench while hitting it? that might get it to break it loose.

Yea, it spins freely, so I have to think it is the spacer there.. Dang it. I am guessing its just rusted to the bolt.. I will keep shooting WD40 in it until next weekend and see if it free's up.. errr...

collar isn't threaded just rusted, u could try atf acetone mix

I have both in the garage, any special mix ratio?

[750goes]

Use a brass drift on the threaded end and knock it out

[Zaipai]

Use a brass drift on the threaded end and knock it out

Don't have one.. Might be able to find one at the hardware store, in the mean time, I put the bolt on flush with the end and hit HARD several times with a 10lb mallet and it did not budge.. The brass drift is a good idea, I wont feel so bad hitting so many times with that.

[BobbyR]

no, the bolt is only threaded on the end, have you tried to rotate it with a wrench while hitting it? that might get it to break it loose.

Yea, it spins freely, so I have to think it is the spacer there.. Dang it. I am guessing its just rusted to the bolt.. I will keep shooting WD40 in it until next weekend and see if it free's up.. errr...

collar isn't threaded just rusted, u could try atf acetone mix

I have both in the garage, any special mix ratio?

The ATF Acetone mix is 50/50 good luck looks like a #$%*.

[Zaipai]

no, the bolt is only threaded on the end, have you tried to rotate it with a wrench while hitting it? that might get it to break it loose.

Yea, it spins freely, so I have to think it is the spacer there.. Dang it. I am guessing its just rusted to the bolt.. I will keep shooting WD40 in it until next weekend and see if it free's up.. errr...

collar isn't threaded just rusted, u could try atf acetone mix

I have both in the garage, any special mix ratio?

The ATF Acetone mix is 50/50 good luck looks like a #$%*.

Thanks BobbyR I will give it a try tomorrow night after work.. And you are correct its going to be a #$%*.. its the last damn bolt also.. I am sure Murphy's law is at work here..

[BobbyR]

no, the bolt is only threaded on the end, have you tried to rotate it with a wrench while hitting it? that might get it to break it loose.

Yea, it spins freely, so I have to think it is the spacer there.. Dang it. I am guessing its just rusted to the bolt.. I will keep shooting WD40 in it until next weekend and see if it free's up.. errr...

collar isn't threaded just rusted, u could try atf acetone mix

Never fails Bro. never fails
I have both in the garage, any special mix ratio?

The ATF Acetone mix is 50/50 good luck looks like a #$%*.

Thanks BobbyR I will give it a try tomorrow night after work.. And you are correct its going to be a #$%*.. its the last damn bolt also.. I am sure Murphy's law is at work here..

[750goes]

Have you got the motor supported underneath? that could be one reason the bolt is stuck - it may be taking the full weight of the motor.

Get a jack underneath it and take of the pressure of the motor in the frame - then give it a whack..

[dave500]

try hitting it back and forth aswell.

[René 衛星の]

The bolt is probably rusted to the collar indeed.

I would use an air wrench on the pin head, while holding the collar with a grip.

[Zaipai]

Have you got the motor supported underneath? that could be one reason the bolt is stuck - it may be taking the full weight of the motor.

Get a jack underneath it and take of the pressure of the motor in the frame - then give it a whack..

You may have a point, currently its on its side because I figured all the other bolts came out so easy I had nothing to worry about. I will have to try a few things. The front end is off and the rear tire is off also so getting a jack under it atm is not going to work. I may have to put every thing back on it to do that.

.: Scott :.

[Zaipai]

The bolt is probably rusted to the collar indeed.

I would use an air wrench on the pin head, while holding the collar with a grip.

No air compressor.. So..... Gonna have to try and manually push it out.. sigh...

[lynchj]

Mine was stuck too but not that bad. I always have good luck with PB Blaster to loosen up rusty bolts. Soak it good, give it few light taps Both ways (to the left and to the right) , soak it again and let it sit overnight. Don't hit the threads too hard, if you peen it over it will be even harder to get out. leave the nut threaded on a few turns and whack the nut. I don't believe WD40 is meant for loosening rusty stuff.
Good Luck!

[BlindJoe]

Have you got the motor supported underneath? that could be one reason the bolt is stuck - it may be taking the full weight of the motor.

Get a jack underneath it and take of the pressure of the motor in the frame - then give it a whack..

You may have a point, currently its on its side because I figured all the other bolts came out so easy I had nothing to worry about. I will have to try a few things. The front end is off and the rear tire is off also so getting a jack under it atm is not going to work. I may have to put every thing back on it to do that.

.: Scott :.

do you have a way to harness the engine with straps? eyebolts in the joists or a beam between two ladders?

[Don R]

If you have it on it's side, the weight of the engine isn't holding it in there. Just keep after it, heat might help loosen things. I've seeen people break things getting excited with the hammers. Just don't despair, it will give up sooner or later.

[Zaipai]

Well its still stuck, I could not find any PB Blaster any place around here. I have seen on the forums where that worked for things like this. I lifted the motor off its side so I could get a better hit on the end of the bolt and the motor is sitting on the floor and the frame moves freely so I don't think its the frame keeping it from sliding out. I also took a vice grip and clamped it onto the spacer and turned the bolt and I could not get the space to move freely, it seems to be rusted to the bolt. I will try the 50/50 transmission/acetone mix and see if that works. Tomorrow I will hit some places by work and see if I can find some PB Blaster..

Thanks for all the input.. keep em coming, one of them has to work.

.: Scott :.

[BlindJoe]

dont waste your money on the PB, atf/acetone mix is much better

[Zaipai]

dont waste your money on the PB, atf/acetone mix is much better

Ok I will give it a good soak tonight and try and get it out tomorrow after work.. I will then see where I am. I tried to heat it up however with the wires in the way I was afraid to get it too hot.. So it got really hot to the touch but did not seem to help much.. sigh..

Figures the one blt left to get the motor out.. err..

[Zaipai]

Errrrgh.. Still stuck.. Been soaking it with the 50/50 mix.. I am going to try and find some PB Blaster and they also make something just for freeing up frozen parts so I am going to try that as well..

.: Scott :.

[Alan F.]

Forget the PB if you're using the 50-50 ATF/acetone mix, it's superior to PB.

I was wondering if it might be beneficial to drill through the spacer (but not through the bolt) and get some acetone/atf mixture down inside to work it's wonderful magic?

[BlindJoe]

do you have access to a welder?

[mystic_1]

As a last resort, you could slice the spacer lengthwise with a dremel and then spread it with a screwdriver, that'll free it up.

mystic_1

[SHELLFISH]

I would bet the ranch that your problem is entirely in that spacer!

You've tried soaking it and that didn't work.
Get or borrow a gas torch and heat that spacer up.
Just heat it up paralell to the shaft on one side, rotate and heat up the other side.
You shouldn't have to get it cherry red.
When both sides of the spacer are hot drive out that shaft with a brass drift.
Good luck finding a drift that diameter. And it will probably only be 9" long.
Be prepared and have a long carriage bolt redy to push that brass drift all the way through.

Be forwarned that you will prbably bugger the threads on the shaft and you are not doing the spacer any favors either. It's only a spacer so no threat!

Good luck and have some beers ready!

[Zaipai]

do you have access to a welder?

Sadly no.. I don't .. I also don't have a dremel nor the money for one. So, I could try heating it up, however there are wires there I have to deal with first. As for the threads they are the least of my worries as the local True Value can get me a replacement (I already stopped by and asked).. I will let you all know how I make out with it. I probably wont get to it again until Friday night or Saturday..

[Zaipai]

Success! Well tonight I got home and hit the end of that bolt with all I had, even mushroomed the end a bit (fixable) then it acured to me.. if I can stop the spacer from moving and twist the bolt maybe it would work. Well I took some vice-grips and locked them on the spacer with all I had, then got the breaker bar and a socket with as many points as I could find and pressed down on the bolt, well it spun so fast I almost hit the ground... I thought great the vice-grips must have slipped, I look up and ........no the bolt was actually turning.. So I spun it around a few times and when it was really loose I pulled on it.. Nothing it would not budge.. So while the vice-grips where still on it, I turned it with the breaker bar and hit the other end with the sledge hammer, and she moved and moved and moved until its almost all the way out. Now it will come out completely I put it back and tomorrow after work I remove the motor from its frame cage!

Thanks for all the advice,
I think the 50/50 was the major catalyst..

.: Scott :.

[BlindJoe]

Good to hear

[sbparks]

All,

 The 'Stuck Bolt' scenario is one that we all face from time to time while working on these bikes.

 My project has had several up to now.  It is amazing how focused on a single step in the process that we have to get to be successful.  But hey, if you can't get that bolt out/off whatever, the you won't go any further.

 My bike (CB750 K4) had a stuck oil filter bolt, a few sticky side engine cover bolts (with the nasty buggered #3 phillips heads) and the fork tubes had challenging seal retainers and seals.

 The reading/lessons I've learned here help so much to do these jobs right.

 My main solution is to use a soaking of 'liquid wrench' (or something similar).  After a while a little heat (propane is enough - Not too much).  Then I make sure I have the right tool.

 So far, each fastener has lost the battle.  Of course, I may have to get a new fastener.  The oil filter bolt was pricy, but, Oh well.

 Havin' fun!

Scott

[Zaipai]

All,

 The 'Stuck Bolt' scenario is one that we all face from time to time while working on these bikes.

 My project has had several up to now.  It is amazing how focused on a single step in the process that we have to get to be successful.  But hey, if you can't get that bolt out/off whatever, the you won't go any further.

 My bike (CB750 K4) had a stuck oil filter bolt, a few sticky side engine cover bolts (with the nasty buggered #3 phillips heads) and the fork tubes had challenging seal retainers and seals.

 The reading/lessons I've learned here help so much to do these jobs right.

 My main solution is to use a soaking of 'liquid wrench' (or something similar).  After a while a little heat (propane is enough - Not too much).  Then I make sure I have the right tool.

 So far, each fastener has lost the battle.  Of course, I may have to get a new fastener.  The oil filter bolt was pricy, but, Oh well.

 Havin' fun!

Scott

Scott,
You are so correct. It was the focus of all my work for almost a week, I mean it had to come out and it had to come out in good shape if it could be because I have already gone over budget on this project..

Still after all is said and done it was soaking it and waiting that got it out..

.: Scott :.