Hi all,
Trying to work out how to measure my oil pump....Ive got a cosworth oil pump that I bought from a member on here and Im trying to sell it on, but been asked if its a 11mm or 12mm. Also, is it a Cosworth pump

Could someone please tell me what Im measuring

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Its a 10mm pump as stamped by the crank sensor.
The size refers to the width of the pump gears inside.

Mick

 

Thank you, looked up at Graham Goode and it appears it isnt a Cosworth pump either

oh well, still got to sell

 

Might be a RCM modded pump - anything engraved on the top of the pump to the right of the cam sensor ie RCM mod *** ??
They normally have a straight body PRV and a modded spring height.

Mick