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This is what I did to get a 30
mm, Berg blueprinted, Schadek Type 1 oil pump to fit. A 26 mm would be
about the same to install.
It requires very minimal work or tools. The fact that you are reading this means that you can do it with minimal fuss. You will also need 4 new 8 mm case studs that are longer ( I used 40 mm) and a VW T1 8 mm flat or stamped steel oil pump cover. No, I didn't take a picture of them. |
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Here you can sort of see the first
step.
Press the shaft all the way into the gear until it is close to flush. The closer to flush, the less you will need to trim off the drive tang at the other end. A machine shop or friend with a press can do this in about 3 minutes. You may be able to do it with a healthy sized hammer, IF you trust yourself. |
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Here you can see the modification
to the pump body and the drive tang. I had to take about .030" off the
pump body that supports the drive shaft. I used a drill press with a sanding
disc in it. Check clearance between the pump body and the cam gear bolts
or rivets that secure the gear to the cam shaft to ensure you have a minimum
of say .010".
The drive shaft is next. I ground a slight point to the drive tang so it wouldn't bottom out in the drive slot on the cam. I took about .020" off the overall length, and made the angles fit the cam drive slot. |
| Now set the pump body in the left case half (the one with da distributor drive, yeah, that left) and make sure that the pump outlet and the case inlet line up real well. You may have to do just a little massaging here to get a nice smooth transition. A mismatch here can cause a flow disruption and possible cavitation (so I've been warned and so have you). | |
| I'll put a cool picture here someday! |
That's basically it. Double check the clearances between everything. You don't need a bunch of end clearance between the cam and the drive tang because the cam shouldn't have more than .004" end play and the pump should be around .004" max . |
| I used the Berg 30 mm pump because I feel it is the best you can buy. It has a hard anodize finish, has been o'ringed to seal the pump body to case, and is made from the same material as the case giving equal expansion rates. It is also cheaper than what I was quoted for a T4 oil pump. |