SOHC.co.uk Forums > CB500/550
Getting back to my Honda
Oddjob:
Engine to frame would be my guess Bryan. One of the engines I recently bought in the job lot has both front bolts stuck and both underside also stuck. I was trying to get them loose when I spotted someone had snapped a cylinder stud, N/S/R and in order to get the remains out of the cases they'd cut across the gasket surface and fitted a slightly bigger stud. I threw the cases away after seeing that, I tried to salvage the rest of the studs but they refused to come out even with a LOT of heat.
BTW, the engine bolts wouldn't come out either, ended up drilling one out but it drifted a little, I was looking at how to fix that when I spotted the stud. Combination of both of those was enough for me to give up. Sometimes you're just flogging a dead horse.
Tomb:
--- Quote from: Bryanj on October 04, 2022, 05:45:21 PM ---Do you mean the bolts holding engine to frame or bolts holding cases together?
--- End quote ---
Not the cases together.
The front bolts in the cases that hold the triangular frame brackets. The bolts are solid in the captive nuts in the cases, if I turn the bolts and the nuts turn with the bolts will the nuts break the cases, when using a long breaker bar?
I have snapped the head off one, so only one bolt to go before engine can come out, and even that one is only holding the triangular bracket, the M8 bolts are out of the frame.
Tomb:
--- Quote from: Laverdaroo on October 04, 2022, 05:56:00 PM ---A bit of love needed for sure. Have you tried Plus Gas penetrant oil, its absolutely spot on. Some of the mount bolts and case bolts were practically welded onto my 550, a 24hr soak in that and a bit of heat and not broke and all came out without necking off.
flea bay number 202951224018
EAN 5010352802202
I was surprised how good it is, worth a go if youve heaps of stubborn ones to do Tom.
--- End quote ---
Tried plus gas, WD40, diesel, heat, big breaker. I’m going to spread the nut with a sharp chisel next.
Thanks for all replies chaps, even if I’ve already tried most stuff, one reply I might not have. The encouragement is great too.
Oddjob:
Yes, the casing are likely to break if too much pressure is applied. Even an impact gun refused to move mine. I had some luck doing this on one of my engines, I drilled a 3mm hole in the casing above the bolt, I then fed penetrating oil down this hole for some time, this method allowed the oil to go inside the corrosion and slowly get it to release. I then filled the hole in with epoxy and painted over it. It can take some time to work, mine took around 10 days before the bolt would move.
Tomb:
--- Quote from: Oddjob on October 04, 2022, 05:58:08 PM ---Engine to frame would be my guess Bryan. One of the engines I recently bought in the job lot has both front bolts stuck and both underside also stuck. I was trying to get them loose when I spotted someone had snapped a cylinder stud, N/S/R and in order to get the remains out of the cases they'd cut across the gasket surface and fitted a slightly bigger stud. I threw the cases away after seeing that, I tried to salvage the rest of the studs but they refused to come out even with a LOT of heat.
BTW, the engine bolts wouldn't come out either, ended up drilling one out but it drifted a little, I was looking at how to fix that when I spotted the stud. Combination of both of those was enough for me to give up. Sometimes you're just flogging a dead horse.
--- End quote ---
Not quite so desperate as I have another engine to go in, but I would like to rebuild the original later so it would be nice to get it apart without breaking anything
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version