So i want to replace my oil pump with a pump/filter. When I rebuilt the engine i didnt take note of the cam gear type (ie flat vs dished). I did a cam swap/upgrade with Stan Pobjoy so Im assuming that he's given me the same type cam gear type back (he agreed with this assumption when i called him).

The original pump was 26mm and the flange thickness is about 5-6mm. This was replaced by a 30mm pump with the flange thickness of about 12mm.

From this can it be determined for certain which cam gear I've got? I'd prefer not to pull the pump out to check until I'm about to change the pump for the pump/filter

Thanks in advance
- Jon

Was the cam upgrade a new performance cam of sorts?

OEM cam gears are riveted on solid to the original vw cam, thus when an aftermarket cam is purchased, generally a cam gear is purchased separately to be 'bolted' onto the new cam (such as scat, Engle etc.)

These 'new' cams are the 'flat' type for 'universal-ability' and thus use the associated oil pump relevant to the 'flat' cam gears. the oil pump drive itself (whether it is dished or flat) isn't in the pulley, but the end of the camshaft through a bore in the centre of the pulley.

yes. my original cam shaft and cam gear was exchanged for one of Stan Pobjoy's specials.

Im aware that the drive for the oil pump is directly off the cam gear and has nothing to do with the pulley (if that's what you meant)

Stan uses reground cams so could be 3 or 4 rivet, but by your explanation it sounds like it's a 3 rivet/flat cam.

It will be an Ivan Tighe reground VW 3 bolt (Flat) cam.

so turns out it was a 4bolt dished cam. oil pump now on order