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MG TD TF 1500 - cotter pin in sump

ok. so i got the engine on the mg td mrkII back up and running.. I got the coil and fuel pump circuit sorted and working. I just ran the car for the first time and i have a drop of oil coming out of the cotter pin on the sump.Hmmmm. Does that hole serve a purpose ? With the new seal that seals to the crackshaft outer edge from Hitech. Can i cap that silly hole or what ?
jj jones

The hole is to let the oil out....if you plug it, eventually you will have a bell housing full of oil..... there are little 'collectors' that some have attached to catch the drips....think there is a photo in the archives....
gblawson(gordon- TD27667)

There's an old saying JJ ...

"Do y'know why the Brits never manufactured TV sets? Because they couldn't figure out how to make them leak oil"

Be thankful its just a drop. While the Archimedes Scroll does its job while the engine is running, the moment the engine stops, the scrolling stops and any residual oil on the (rear main) bearing surface will dribble out.

Welcome to the real world of British cars, JJ. If your MG doesn't leak oil, then its got to be a fake!

Gord Clark
Rockburn, Qué.

Gordon A Clark

It was in the archives.....

gblawson(gordon- TD27667)

Gord et al,

A similar device is being produced commercially - a sort of a tray. Don't recall where I saw it, though.

Gord Clark
Rockburn, Qué.
Gordon A Clark

My XPAG engine has no oil leaks, even after a shut down. No Moss or other
seal has been installed. OEM rear scroll only, attention to detail, I.E.,
minimum main bearing clearance; line boring of the block & hand fitting of the
I do use the Hal Kramer front seal, A double lip seal
Len Fanelli

The rear seal is an "Archimedes Scroll" type seal- there is a spiral machined into the crankshaft, with a close-tolerance slinger fitted. This spins and screws the oil back into the pan while the engine spins. All of the rest of the XPAG's in the world except Len's leak, some profusely! The cotter pin jiggles around to keep the hole from getting blocked up. Gordon is serious- don't block the hole. BTW, Len is a professional auto tech/ace machinist/engineer that has among other things devloped a neat roller cam set-up for our cars- that is why his doesn't leak (or it is out of oil). George
George Butz

I bought a Triumph 650 in the 70's, it had been owned by a machinist....he skimmed every flat surface....never leaked a drop....
gblawson(gordon- TD27667)

This thread was discussed between 03/10/2010 and 04/10/2010

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