cranking for oil pressure

[cseven]

one more technical question!

When I built my last caterham you disconnected the inertia switch to prevent the fuel pump supplying fuel. My academy car doesn't have a inertia switch as far as I can see so to crank oil pressure can I just:

1. take out the fuel pump fuse or/and
2. disconnect the fuel line to the fuel rail

any thoughts?

Steve

[Graham D]

You only need to take the fuse out.

Graham

[Jack_and_MLE]

I just disconnect the injector plug, connect a second battery and crank the engine

Jack

[BertBert]

Presumably with the plugs out, it doesn't take much ooomph (technical term) to crank for oil pressure?

[Graham D]

I’ve always done this with the plugs out since I don’t see any point in giving unnecessary grief to the battery or the starter motor. It can take what feels like a long time before the oil pressure gauge registers any significant pressure, particularly if the engine has an Apollo tank and has been idle for some months (with or without a non-return valve).
If you are changing the oil I would also recommend filling the sump, filter and Apollo tank separately to reduce the cranking time.

[Jack_and_MLE]

I personaly leave the plug in.
I have a couple of old heavy duties batteries from a truck, this is why i do it like this, and I now that nothing can fall into the cylinders!

I pour a liitle amount of clean oil in the cylinder after a long lay up

Jack