oil pump, which one Options

[trojanhorsepower]

All,
I am looking to change the oil pump as a way to up my oil pressure. I understand that this may well not help, but having a new oil pump around is OK.
With that in mind, what are my options? I will pull the motor but hope to not split the case. Is this even possible? Which pump?

Thanks

Peter

[Superhawk996]

Here is an example of the T1 Shadek pump factory peen.



Keep in mind, I’ve seen some of the T1 pumps that are modified for T4 use and this factory peen get machined off. Effectively leaving you with an unpeened idler . . . Just like the OEM T4 pump that everyone dogs for the potential migration issue. Go figure (IMG:style_emoticons/default/headbang.gif) see amount machined off (arrow) and lack of peen of what’s left (circled). I’m not suggesting all are this way, just the one I had in my hand based on what I personally saw.



So I’ve seen different peened T4 parts and sometimes it’s a combination of multiple small peened spots and other times it’s just two or three bigger peens like the Shadek. I don’t think it matters all that much as long as the ID of that idler shaft bore is deformed enough to prevent the shaft from ever coming out proud of the pump body.

Example of peened with multiple little deformations around circumference of the idler shaft hole.