[Healeys] Threaded Hole

[Steven Kingsbury]

Not sure what it's for, but it does exist on my engine and the plug that fills that hole uses a 1/2 BS or 7/16 WW socket. Again not sure what it's for. But I'm pretty sure if you don't plug it, you're going to have some problems.
   Also look at the back of your block, there is a hole that used to fit an oil feed that was eliminated on 100 engines, but is used to feed oil to the 100S distributor I believe. The hole wasn't plugged on my block and I didn't notice it until I had the engine back in the car and fired it up and it leaked oil out the hole. Standing behind your engine, it's a little off center to the left and about an inch below the head. I've been told it should be a brass plug. I made an aluminum plug and pressed it into the block.
Steven Kingsbury 
   

On January 17, 2021 at 12:25 PM, Michael MacLean <rrengineer.mike at att.net> wrote:


Can someone please tell me what this hole is for?


Mike MacLean

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