Rob ,
Just a few thoughts on your engine rebuild .
> ???Does anyone know why those round plugs are there???
> I have had the aluminum plug welded. Does this plug go to the water jacket
> and does anyone foresee any potential problem in using a head that has had a
> weld on this plug?
The aluminium core plug goes to the water jacket .If there was a
problem , the plug could always be changed with the head fitted .
> I noticed that the fifth head I purchased at auction was slightly different.
> I found some different numbers on it and upon checking Bill Pigott's book
> and the "chart" for TR2-3-4-4a heads I found it was a TR4A head.
Have you thought about fitting the TR4A head ? They are said to be more
efficient and stronger than all the others .
> Should I now rebuild engine block #7257E (TR2) or the TR3
Personally I would use the TR3 engine with the camshaft bearings
and 86 mm + .030" , would go well with the 4A head !
BTW it's common practice to mix metric and Imperial when talking
about cylinder bores and oversizes .
> Can used cylinder sleeves be removed and then reinstalled
> with new figure 8 gaskets?
Yes ....but it's not always easy .
> assured me that it was probably a real problem and that I would be well
> advised to get new bolts. Would the listers agree on this?
Studs can stretch , also the threads can be damaged and strip
when torquing down the head .
I also think that the difference in stud length is to accomodate the
different heads .
Afraid I don't know much about stellite valves , but they are said to
be good .
Good luck
Mike Kitchener
60 TR3A TS 75178
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