Oil pump gasket

Zoomzoom · Nov 2, 2022

I have a 1969 commando engine and am not sure if it requires a gasket behind the oil pump

baz · Nov 3, 2022

Zoomzoom said:
I have a 1969 commando engine and am not sure if it requires a gasket behind the oil pump

Yep it does
No gasket cement

Zoomzoom · Nov 3, 2022

baz said:
Yep it does
No gasket cement

Thank you for your assistance,does 1968 also use a gasket behind the oil pump?

Zoomzoom · Nov 3, 2022

Zoomzoom said:
Thank you for your assistance,does 1968 also use a gasket behind the oil pump?

Andover norton does not show a gasket 1968-01970

Voodooo · Nov 3, 2022

Zoomzoom said:
Andover norton does not show a gasket 1968-01970

You’re on the wrong forum. This is for modern 961 Nortons. You need the classic Norton section.

baz · Nov 4, 2022

Zoomzoom said:
Thank you for your assistance,does 1968 also use a gasket behind the oil pump?

They all have a gasket

texasSlick · Nov 4, 2022

FWIW. ...... The Atlas does not. Dommies and hybrids??

Slick

baz · Nov 4, 2022

texasSlick said:
FWIW. ...... The Atlas does not. Dommies and hybrids??

Slick

Really! ? How does the pump seal?

texasSlick · Nov 4, 2022

baz said:
Really! ? How does the pump seal?

No need to seal ..... The pressure side of the pump is directed to the conical seal. The suction side of the pump, the base, draws from the sump.... If there is a leak at the base, some oil from the timing chest is brought in and mixed with sump oil .... no big deal.

Slick

baz · Nov 4, 2022

texasSlick said:
No need to seal ..... The pressure side of the pump is directed to the conical seal. The suction side of the pump, the base, draws from the sump.... If there is a leak at the base, some oil from the timing chest is brought in and mixed with sump oil .... no big deal.

Slick

Never thought of it that way
So really none of them need a gasket
I think I'd still fit one

texasSlick · Nov 4, 2022

baz said:
Never thought of it that way
So really none of them need a gasket
I think I'd still fit one

Yes, I thought of fitting one at one time, but decided to stay with the stock configuration.
Note that, should you fit a gasket, it may become necessary to relieve the conical seal, as the thickness of the gasket will put a greater compression on the conical seal. Use a thin paper gasket if you use one.

I would agree that none of the Commando engines should need a seal, but I would stay with stock configuration..... i.e. use a gasket if one was factory fitted. I agree with your post #2, no gasket goop. Or at least minimal, as the goop can block the oil ports in the base.

Slick