Engine Mount Bolts Seized

[gazza2008au]

so i bought a bike thats had its engine removed since sometime around 2002 i installed a new engine and noticed 3 of 4 engine mount bolts are stuck these are the bolts that center the engine in the frame not the actual bolts that hold the engine in place how would i go about removing these bolts? they are well and truly seized

[seiko1]

so i bought a bike thats had its engine removed since sometime around 2002 i installed a new engine and noticed 3 of 4 engine mount bolts are stuck these are the bolts that center the engine in the frame not the actual bolts that hold the engine in place how would i go about removing these bolts? they are well and truly seized

Heat is good but probably not practical
or you can go the other way and freeze it, cans of freezing shit at Supercheap etc....
Good old Penetrene...put heaps on and leave for a few hr's

[gazza2008au]

i put heaps of WD-40 on it twice and left it over night wouldnt budge

[seiko1]

i put heaps of WD-40 on it twice and left it over night wouldnt budge

WD40 works well if you spray the shit out of it and then use a cigatrette lighter to heat it a bit,
repeat a few times for full penetration

[robracer]

Still trying to figure out which bolts you are talking about?

[seiko1]

Still trying to figure out which bolts you are talking about?

The seized ones!

[robracer]

worked it out ...... title is wrong you will need an impact driver as these come from the factory using locktight.
& suggest not using a screwdriver on the locking nut as it will chew the cutaway

[gazza2008au]

rob the bolts are called "engine mount bolts" there a threaded tube that screws in and adjusts the motors position while another bolt goes right thru the adjustable bolt and bolts the engine to the frame

[robracer]

Know the ones ..... read as above both my ZXR750's had em

[gazza2008au]

where would i get a allen key/hex bolt that big? its something like 14/16mm and how would i get the tool to fit a impact driver or could i just use a rattle gun?

[Blurr]

U get those hex 3/8 ratchet Allen keys from an engineering supplier or snap on. That attach straight onto a impact gun

[robracer]

Not rattle gun it could possibly damage the hole, go to a specialty tool supplier or see if you can beg borrow steal an impact driver & tool.
I have a Sidchrome hex set which is 1/2 inch drive, same as my impact driver, starts at 6mm, other larger sizes I have here were bought off the local snap on dude.

[gazza2008au]

and do what with it use a breaker bar? i read a post last night a guy had the same problem he tried using a 2foot breaker bar and it wouldnt budge

[robracer]

IMPACT DRIVER! its the safest way... its breaks the seal of the locktight

[gazza2008au]

whats the difference between impact driver and impact wrench? (rattle gun is the same thing isnt it?) im looking these tools up on super cheaps web site