1 follow the recommendations on the anti freeze it is not car specific.
2 Only use 20-50 oil never use gear oil in the transmission.The stud is
standard it's the same size as the manifold stud. You will have to drill
it out and tap it so be sure you have the stud befre you buy the tap. You
may have to put one of those coil things in the block to get threads to
hold. there are called heli coils I think, any part store will carry them
...Art
On Sun, 13 Jul 1997, robert williford wrote:
> decided to flush the cooling system and change the gearbox oil today
> since the bad float in the rear su cannot be obtained except thru mail
> order, rendering it immobile until such time as this part arrives...
>
> 1) what mixture of water/antifreeze is usu. run in an mgb? (this is 73
> model)
> 2) the fluid from the gearbox smells suspiciously like 80w-90 gear
> oil, and is thick enough to qualify as such. the manual suggests
> 20w-50. any recommendations? which provides more protection /
> causes the least problems?
> 3) 2 of the 3 water outlet studs are bolts, the third is a two-way
> stud threaded into the block, holding the outlet with a nut. of
> course, this stud broke under pressure today as i was removing the
> outlet to flush the block. any idea what size bolt/stud i can use
> to replace this? i only hope its not whitworth...
> 4) on a different note, is the defrost/heater fan one speed or two?
> i took the interior fan switch off today, cleaned it, and got the
> fan running. the switch seems capable of two 'clicks,' but the
> test light doesn't register current when the switch is depressed
> to the second 'on' position.
> thanks in advance...
> robert williford
> 73 mgb with a clear cooling system, empty gearbox, and no carbs....
>
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