09-09-2021, 04:23 PM
(This post was last modified: 09-09-2021, 04:25 PM by Hedd_Jones.)
Some will chuckle at this, but Ive seen it done. Reports were that it worked fine.
This was on a post war side valve Fordson tractor. An engine built up from a number of others, and used exclusively for ploughing matches. So an engine which was not molly coddled. It had a similar issue with regularly blowing head gaskets because of the poor top surface of the block. Fordsons use head bolts, not studs. But a number were helicolied when built up from the bits.
Take all your valves out, bung up the threaded holes.
Plaster the top of the block in belzona. Thin layer.
Put rags in the bores.
Use a surface plate or piece of glass with some emery cloth to take as much of the belzona off as possible, but still leaving you with a flat face. Essentially the ideal is you fill all your pits with belzona, but have none on the rest.
There will a hell of a lot of clean up.
Glue the studs in with loctite. Don't be mean with it.
Put the valves back in.
Lap the head onto something flat. You can do the same with belzona if neccassary.
Fit head gasket with your choice of goo. But not dry.
My mate reported no more problems, but when he did eventually take the head off, the belzona in the combustion chamber was long gone.
This was on a post war side valve Fordson tractor. An engine built up from a number of others, and used exclusively for ploughing matches. So an engine which was not molly coddled. It had a similar issue with regularly blowing head gaskets because of the poor top surface of the block. Fordsons use head bolts, not studs. But a number were helicolied when built up from the bits.
Take all your valves out, bung up the threaded holes.
Plaster the top of the block in belzona. Thin layer.
Put rags in the bores.
Use a surface plate or piece of glass with some emery cloth to take as much of the belzona off as possible, but still leaving you with a flat face. Essentially the ideal is you fill all your pits with belzona, but have none on the rest.
There will a hell of a lot of clean up.
Glue the studs in with loctite. Don't be mean with it.
Put the valves back in.
Lap the head onto something flat. You can do the same with belzona if neccassary.
Fit head gasket with your choice of goo. But not dry.
My mate reported no more problems, but when he did eventually take the head off, the belzona in the combustion chamber was long gone.