21-02-2021, 10:24 AM
(19-02-2021, 03:14 AM)David Grear Wrote: I remove the plugs by drilling a hole in the centre of the plug using drill bits increasing in size to 3/4 of an inch.
Then carefully cut out the remainder with a die grinder until the it falls out.
The thread is 1 1 /4 x 16 and a tap is available from Tracey Tools.
One of our members manufacture the new plugs in brass that are then sealed using Loc Tite 515.
The small brass plugs are also removed the same way and they are 3/8 Gas.
New plugs available off the shelf.
This might seem to be unnecessary but I am in Australia and the temperature is currently 38 degrees Celcius.
(19-02-2021, 07:44 PM)Colin Wilks Wrote:(19-02-2021, 01:25 PM)Stuart Giles Wrote: David, That's interesting information about the thread of the large screw in core plug -@ 1 1/4" x 16 TPI it's the same as the rear axle hub thread.
I'm hoping Stuart is wrong about the hub thread, otherwise I've just wasted my money on a 1 3/8" x 16 tpi die for the hub.
Does your car have the late "heavy" rear axle? These have bigger wheel bearings than earlier cars; ISTR that the hub thread on those is 1 3/8"