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hole in the head

Joined Jul 2008
64 Posts | 0+
bradford uk
hi there i havent been on for a while but ive still been reading and learning which brings me round to my next problem lol. if you look in my gallery you ll see a couple of pics where i have a hole in the head near the spark plug, its where the socket goes down to loosen the spark plug. firstly,can i use liquid alloy secondly, does it have to be welded thirdly, how has this happened, is it with wear from taking the plug out because the alloy looks very thin around that area.
cheers mick
 
I believe you are talking about the drain hole. It's there to stop water from collecting in the spark plug well. I don't think you want to plug it.
 
i was with berger until i went to look at your gallery

DSC04786.JPG


not the drain hole.

bit of duct tape should sort it.
 
thanx for your replys, dont you think abit of liquid alloy would do the job better than duct tape lol , ive a friend who says he can weld it for me but ive a funny feeling that when he starts to weld it it will blow into a bigger hole than it is now, oooooooooooo well i ll have to have a think about what to do, cheers, mick
 
Duct tape won't hold. The head will get hot and it will become a gooey mess.

Where does the hole lead to? If it doesn't go into a water or oil passage, and doesn't go into the combustion chamber, then it does no harm and I would leave it alone.
 
id pull the rocker cover and then you should be able to get to it from the inside.

blob of liquid metal of similar on the inside then once its set, tidy up the outside and job done.
 
might get away with a bit of degreasing, file some bare metal and blob of threebond 1207B

to fix it properly any quality epoxy will do, the ally is cast and very hard so can be difficult to weld but sure that'd work too
 
saw a head open today with a bigger hole than that one,

that hole is just the thread for one of the rocker cover bolts

pull the bolt out blast some air through, bit of solvent to flush

coat the bolt threads with loctite 515/ 518 or even rtv and put it back in.
 

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