TR4/4A Rear Oil Galley Plug Sealing

[smaceng]

The TR2,3,4 and 6 all have the same problem with overheating when adding coolant. Air bubbles get trapped in the head, and hot spots result. I've had both my 4A and 6 short term overheat when starting up after a major repair. I now use a device which allows a vacuum to be pulled on the cooling system, checking for leaks, and then adding coolant; all in one operation. Very swift.
Side Bar: I overheated my Lemons VW Rabbit engine so bad that it melted part of the aluminum cylinder head, all because of air pockets.
Good luck, Scott in CA

 

[Jayplum]

As to the shavings when you re-tap a hole. When repairing or resizing a hole with a tap, I've always used white grease; it picks up the shavings. Used this method when putting inserts in VW heads and never had an issue.

On this subject, I have rebuilt my 1957 TR3 engine. I had a machine shop do some of the tasks which I was not equipped to handle. In cleaning the block they removed the three oil gallery plugs and subsequently lost them. I can not find a source for these; any help??