I have a 1985 300 SD, the starter is hung/seized up. There are two
hex head bolts on the rear of the starter that have to come out. I
could find only metric allen drivers to 10 MM (a set) at Autozone and
Sears, but it's bigger than that. It seems to be 3/8 in. more or
less, but I am pretty sure all bolts are metric size. Does anyone know
exactly what size allen driver is needed? As it is, I would just have
to get a set of drivers somewhat larger than 10mm, if I could even
find a set of larger sizes. I think I know of a specialty tool store
that would have exactly the right individual metric driver, If I knew
which I needed. Thanks!
10 mm is just very slightly BIGGER than 3/8"
3/8" is actually 9.525 mm
Are you sure the 10mm won't do it?
According to this website which is the first I googled, the proper tool
is an "HZ 2775 HAZET special swivel socket, 1/2" drive 10mm hex bit. For
mounting and dismounting the starter."
However, I don't know if this applies to 300SD starters or not.
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