engine mounting bolt stuck - ideas?

I need to remove the engine mounting bolt on my 1998 VFR800 and it is stuck fast. Any ideas - have tried heat and leaving it for days with penetrating oil, no joy!
Unless I can remove and replace the bolt the bike is scrap - shame, 'cos its still a lovely bike to ride.
hope someone knows a trick or two.
Phil

 

Got a pic of said bolt?

 

If you can tap on the bolt with a hammer it helps break up the molecules.
Also heat ALWAYS helps. Just a little hand held propane torch for a few minutes.
If you heat the aluminum it will expand. Just not to much in one small spot. spread out the heat a little and do it gradually. Then tap with a small hammer too at the same time.

You can do it.

 

tried so far......

Thanks for tips -
I don't have a picture of the bolt that is stuck but there is only one like it on the bike. The engine is mounted into the frame with 4 short bolts and spacers (these all came out easily) and one long bolt (nearest headstock) that runs from one side of the frame to the other. It is this long bolt that is ceased.

So far I've tried leaving days for oil dripped on the bolt at various point so penetrate - not difference.
I've tried heat (small propane torch) - no joy.
I've tried both small and not so small hammers (with nut in place to protect the treads) - not joy.
Sadly the end of the bolt has now sheared off but I was planning to replace it in any case. It does make removing it more difficult! It needs to drift out or be drilled out - either way I'm out of my comfort zone.
Why do Honda build the bikes without copper slip on these steel-aluminium connections - it would prevent the corrosion binding that will be the cause of this problem.
Has anyone had any luck shifting this bolt on such an old bike?
Phil

 

If you have a friend or neighbor available, have them turn the bolt (preferably with an impact gun/air ratchet) while you tap it out (preferably with an air/impact hammer).

 

looks like your left with using an easy out.... I was going to suggest a low pressure impact wrench...

hope you get the bolt out

 

There was one thing that I'd tried but forgot to mention ('cos it didn't work).

I cut a slot into the threaded end of the bolt and used an impact driver (impact wrench) to try to shock and turn the bolt at the same time. Apart from damage to my hand - nothing happened. This is one stuck bolt.

The other thing I'd tried is a week of dripping coca cola on both ends of the bolt - it eats most types of oxide.

thanks for suggestions.........
Phil

 

Fastenal sells a spray that literally freezes the rust holding the bolt......I have heard that this will allow you to get out almost any stuck fastener. I believe it is called Icy Blast.

Dissimilar metals.....never good over the long term.
.

 

Hi Mate. If it has sheared off you may have to drill out the body of the bolt/stud and retap it to the correct thread. I use Coventry Fasteners in Wagga for my nuts and bolt for my R/C Heli and I think they also carry the Icy blast spray.
Hope this helps and I wish you luck.
Cheers

 

Drilling this long bolt out is not a very good option.
It is a last resort and would need to be clamped down in a milling machine etc.,.

It is too bad you twisted the bolt because it was bound to break.

It can be saved though. It is a common problem with these long bolts.

 

okay Donald.............speak and let your wisdom flow forth.....

 

Copper and steel is the worst as far as corrosion potential. A 30 pt difference.
Steel and aluminum get along better galvanically.

The problem is that when aluminum corrodes the corrosion causes expansion.

All is not lost keep tapping the bolt one direction then the other direction.

If you are removing the engine anyway ,just grind or cut the head of the bolt off and wait until the engine is out so that you can be in a better position to work on it.

That is what I would do. Just wait till the engine is out.

 

Words keep flowing out of my mouth thats for sure. But this bolt thing is something I am good at solving.
Not getting it out, is NOT an option for me.

 

It is not a threaded hole.
IT is a long bolt.

 

Coke does not dissolve ANYTHING!!

If you do not believe me put a nail in a bottle of Coke and look at it every few months.

I am sick of that myth circulating.
Coke has carbonic acid. Won't do anything.

 

old coke will work..the new stuff doesn't.. pour it on a battery it will kill the battery acid.....just be sure to clean off the battery...bees will really love it....

 

Wrong again!! You put baking soda on a battery to neutralize the acid -not more very mild acid.

More Coke myth AGAIN.

 

I'm not wrong I do it all the time....

 

Thanks. I bow to your expertise and knowledge. I didnt check the environment of the bolt.
Chhers

 

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