[Mgs] Oil Gallery Plug Leak

[Charley Robinson]

I did a search on MGA 1600 oil gallery plugs, got lots of hits including 
installation instructions.  There are some plugs with heads on them, 
like a bolt.  One of them might work for you unless it absolutely has to 
fit flush.

CR

On 9/13/2018 1:25 PM, Stan Fickes via Mgs wrote:
> I'm finishing the seemingly unending rebuild of an MGA 1600 motor, and 
> am stuck with a leak. When I had a failure of a brass plug, I chose to 
> replace the big plugs at the end of the long oil galleries with 1/4" 
> NPT steel plugs. I tapped the bores, like I see advice for in many 
> places, and installed the plugs. (I have since seen that the .505" 
> bore is too large for the tapping operation, which should have started 
> at 7/16", so that probably explains the leak.) I used Permatex Ultra 
> Black on the plugs. Months later (did I say it seemed never-ending?) I 
> installed the motor into the car and fired it up for the 20-minute cam 
> installation run. It looked good at first, but after 20 minutes I have 
> a foot-wide puddle of oil under the front crossmember. I pulled the 
> motor back out and found the right-front plug was leaking. I removed 
> the plug, then tried again using Avation Form-a-Gasket. No change to 
> the leak. Tried it (from advice) with Permatex Thread Sealant with 
> PTFE. The leak is slower, but still a problem. I am about to JB Weld 
> the plug into place, but have concerns about its permanence. Will I be 
> able to remove the plug at next rebuild, or at least have a machine 
> shop do it without machining the block? Is there something else to try 
> first? I have cut away the front plate to allow plug removal without 
> disassembly, and am using a pre-oiler to pressurize the system so I 
> don't need to R/R the motor with each attempt. It's out on a stand 
> now, and will be until the leak is gone.
> Thanks!
> Stan
>
>
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