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Well it's my first time changing the oil and as I'm about to remove the filter I come across this rusty old bolt. I tried to unscrew it but the damn thing is stripped! I even busted out the gas pliers to remove it but made it way worst. Anyone know of any tricks to get it removed? I don't have a torch to apply heat to this thing and I definitely don't want to take it into the shop.
I would use the appropriate size screw extractor. Drill the proper size hole in the centre of the head and use the screw extractor to back it out. Worst thing that could go wrong with that plan is that you could break the screw extractor off in the head of the bolt so you won't be any worse off than you are now.
four possibilities here...
spline cutting socket like Worst said..
cut slot with cutting wheel or hacksaw blade...then use flathead socket...
or gently tap counterclockwise with a half chisel...
or spin whole cup with channel locks...
use either plenty of penetrating oil...
or buy a propane torch and warm it up then try these things...
screw extractor is also a good idea..but warm it or lube it...
good luck
First try is a small pipe wrench with a two foot length of "cheat" on it .
Next is to carefully die grind the outer 1/8" away to expose the O-ring as that believe it or not is what is holding the whole thing from turning .
Heat doesn't usually do any good as it just makes the O-ring stick even worse .
Last resort is to grind of what is left of the nut flush with the rest and start drilling your way up to 3/4" in several steps but only about 1/4" deep . Eventually it will let go and the shaft will nearly spin out by hand making you wonder what all the fuss was about .
15420-300-020 for the replacement part .
I'd hafta disagree about the o ring...
pretty sure it a phenomenon known as dissimilar metal corrosion...steel bolt, aluminum cup...
but hey...
I may be wrong...
not sure how the heat would make a rubber o ring even stronger..but hey...you might be right..
True enough . In this case there is very little surface area of the bolt in contact with the casting . The bolt is easily over tightened by the novice in response to leaks caused by not replacing the O-ring . Once a hammer mechanic uses an adjustable wrench or pliers to attempt removal it gets worse in a hurry . I've had to carve several of these out through the years simply because someone didn't use the right tool in the first place .
Well, the bolt grips didn't work The damn thing didn't catch and stripped it worst. Oh well, I have a friend of mine coming this Thursday and he has bolt extractor set with drill bits and also large clamps. We're going to try to get this sucker off one way or another. I'll update on the results.
So I finally got this baby off! With a little help from a friend of mine and his trusty grinder. Now I just need to wait for the replacement bolt to come in. Thanks for all the suggestions!
When we used the bolt extractor on the MG, we actually had to hammer on an extractor socket that was smaller than the bolt head. I probably should have mentioned that, sorry man!
man this is exactly where i'm at! I've mangled and hammered and chiseled and 'screw extracted' the shit outta this bolt and it's laughing at me still.
I dremeled a channel in it and hammered a metal file in there sideways for leverage and broke the damn file when i torqued it! ended up cutting mine square like the pic above and got my big ass vice grips on it and wouldn't you know it, I twisted the fuggin head off. gonna grind the bitch...
CB750Supply has the bolts for 12$ so one is on its way..
OEM Number: 15420-300-020
does anyone know of any spin on filter kits for a 1980 CB750C? I saw a link for an adapter a while ago I believe; but I cant remember if there were issues with exhaust clearance.
like this @ CB750supply:
Chrome Spin On Oil Filter OEM Ref. # 15410-426-010
http://www.cb750supply.com/products/4/engine/74/lubrication-filters-o-rings-drain-plugs
does this replace the bolt/filter/housing unit? Can anyone confirm fitment?
Yeah these bolts are so damn crusty some times that a little force or ingenuity is necessary. I love that screw on filter! I'm going to probably invest in that down the line as well. Great post!
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The damn thing didn't catch and stripped it worst. Oh well, I have a friend of mine coming this Thursday and he has bolt extractor set with drill bits and also large clamps. We're going to try to get this sucker off one way or another. I'll update on the results.
