If I may, a question for those of you that enjoy fettling away on engines for hours on end.......

Can anyone recommend a putty/filler/epoxy that can be used on aluminium engine blocks that run on methanol?

In the past we have used, with little success, a number of different products but have not found one that is up for the job. The last product we tried was a Loctite 2-pack high temperature epoxy set (Loctite Hysol 3479). Although Loctite said it would be fine with methanol, over a short period of time (one or two races) the putty in the engine block became soft and where it was thin, lost adhesion to the aluminium

I wonder of you guys have discovered a product that is suitable? Preferably, I'm looking for something that once applied and left to go hard, the putty can be worked and shaped with grinding tools, sandpaper and the like

Any advice you can offer would be much appreciated

Regards

Corin

PS - the engine we wish to use it on is a pro class hydro outfit