The hardened washers on my HRG- Derrington head are 7/8" (21.2 mm) diameter x 1/8" (3 mm) thick - these are the same size that you thought they should be (in the ceramic coating thread). My head studs are 7/16" dia (original MGB are 3/8" I recall) so may give the illusion of the washers being smaller.
I also found the HRG service bulletin advising head stud torque to be 32-35 ...
From what I can find there are two ring gears available and two matching bendix drives As long as you have a new bendix that's matched to your new ring I guess it will be ok , but I'd check up just to make sure
I am also not sure of the science behind ceramic coating the extractors other than reduction in engine bay temperature (maybe not so big an issue with a cross flow head especially if a cold air box was fitted). My other reason for pursuing is aesthetics - a nice shinny exhaust looks better than a rusty one!
Interesting in Peter's book "How to ...MGB four cylinder engines" P105...
I don't think that machined side is a leed in, the taller side goes towards the gearbox i believe and is the side the bendix comes at it from happy to be wrong --I'm no t type expert That ring gear looks wider than your original from the pics , might pay to check up and make sure it's not an MGA one willy
After 6 years I am looking for a good new home for my beloved MG. She’s an old lady now and needs a lot of work done. She still runs incredibly well for her age. She will need a buyer with money and time and hopefully a love for these dying breed cars. Although she has her problems, she still runs too well to scrap. I don’t see many of this spec anymore so seems such a shame to le...
The car is presently fitted with bolted removable sebring valances as in photos, which can be unbolted and replaced with the original chrome bumpers as standard. The original seats, and wheels come with the car.
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