SOHC.co.uk Forums > CB350/400

Front engine mount stuck

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K2-K6:
Yes, aided by a good supply of salt solution from winter roads.

Pretty strong bond it makes too!

I use SDS hammer drill to get things like this to release, as Julie says though,  you have to be veeeeery careful to support the cases to avoid damage to the casting.

If you used a steel pipe with a flange on it to place over the stud,  then support that pipe,  the loading is not taken by the cases so you can attempt to drift it out.

The advantage of a percussion hammer effect is to use much smaller but insistent blows.  It usually starts with the aluminium powder coming out first, so you can see it's agitating it.  It's will take time to gently persuade it to move. 

ka-ja:
Have you tried heating and cooling it several times to see if thermal shock will loosen it, might help penetrating oil soak in as well.

Northy:
Soak in diesel for while , then give it lots of heat.  it will move .
Just had the same issues with one of mine

kevski:
Had one like that on my brothers Zephyr, in the end drilled it with an extra long 6mm drill followed by an 8mm, it came out then i guess the heat from the drilling done the job.

Sprocket:
Well, I have no real progress to report. I've got it as hot as a butane/propane blowlamp will go and still nothing has worked.

I think I'm going to have to strip the top casing as much as I can and get it to the engineers.  :(

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