Oil sump plug - non standard - identification needed

[gs.davies]

Many years ago following an oil change, the original sump plug was removed along with most of the threads. A local engine machine shop fitted this in it's place. I'd like to replace it with a Gold plug but I'm not sure what the thread it. It's tapered. Any ideas anyone?

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[woodypup59]

Possibly a BSP tapered type fitted after the thread in the gearbox got mullered.

16.5 mm would match with 3/8" BSP - is it 19 tpi ?

[gs.davies]

I guess this is approximately 19tpi..?

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[gs.davies]

https://www.ebay.co.uk/itm/234447485098

Like one of these?

[Peter Laidler]

I've seen that done, using a hex insert type VW Golf gearbox taper thread plug fitted. Told that such a mod can be carried out in-situ

[gs.davies]

I've seen that done, using a hex insert type VW Golf gearbox taper thread plug fitted. Told that such a mod can be carried out in-situ

Now you mention it, I do vaguely remember them talking about VW Golfs at the time. It was MANY years ago though and it WAS done in situ at Regal Engines Purfleet.

[gs.davies]

It's got an Allen head on it - 8mm from memory

[Catmint]

Can't remember the details off the top of my head but when the threads strip out, it is the ideal diameter for a bsp thread that taps straight in and can be done in situ (don't ask how I know). Pleaty of thread charts on line