Instruction Letter For Machinist To Drill Oil Pump Disk

[sapote]

Thought the same. I know some people prefer to keep the original piece as part of the system. I would much rather have the Beisan disk than an original part modified by someone with questionable experience.

It's safer to keep the stock disk with the 4 pistons. There are cases that the new disk is too tight with the old pistons, causing low pressure.

[sapote]

Depth is an issue actually, mine is currenly bottoming out and rubbing against the disk

This has nothing to do with the depth of the holes. The marking causes no harm.
You don't want less depth as this might cause the driving tabs bottom out in the holes and causes major problem. Deeper is better.

[bigjae46]

I had the tabs on the exhaust hub mic'd before drilling the holes for a slight interference fit.

[maupineda]

a letter means nothing to a machinist, make a drawing with a front and side views, and the desired tolerance. for the new holes a typical +/-.15mm is all you need.

[sapote]

I had the tabs on the exhaust hub mic'd before drilling the holes for a slight interference fit.

Why do you want to have the driving tabs bottomed out in the holes? This might cause the 4 pistons riding off the bearing groove.

[BL92]

Waste of time unfortunately, Machinist said 3 month wait and doesn't have a 9.8 drill bit lol

I'm just slapping it back together for now and hope this oil leak clears up

Was looking at exchange with Beisan until they raised their price $500 USD!

Best i keep mine anyway, since they are non existent here and go VAC Hub with new a oem unit from this guy

[bmwfnatic]

Waste of time unfortunately, Machinist said 3 month wait and doesn't have a 9.8 drill bit lol

I'm just slapping it back together for now and hope this oil leak clears up

Was looking at exchange with Beisan until they raised their price $500 USD!

Best i keep mine anyway, since they are non existent here and go VAC Hub with new a oem unit from this guy

I can send you a disk without core, I have plenty.
If you really want to keep yours, send it to me lmao..

[Obioban]

Waste of time unfortunately, Machinist said 3 month wait and doesn't have a 9.8 drill bit lol

I'm just slapping it back together for now and hope this oil leak clears up

Was looking at exchange with Beisan until they raised their price $500 USD!

Best i keep mine anyway, since they are non existent here and go VAC Hub with new a oem unit from this guy

... $150 post core return.

https://beisansystems.com/product/s54-vanos-oil-pump-disk/

[Cubieman]

Why buy a new vanos unit?
Sounds like you have disc options as well, you can also buy a VAC hub and eliminate the need to do anything at all with your disc.

[maupineda]

That price is not bad, I think getting spare now that they exist and not stupid expensive is not a bad idea.

[ac427]

Waste of time unfortunately, Machinist said 3 month wait and doesn't have a 9.8 drill bit lol

I'm just slapping it back together for now and hope this oil leak clears up

Was looking at exchange with Beisan until they raised their price $500 USD!

Best i keep mine anyway, since they are non existent here and go VAC Hub with new a oem unit from this guy

Any half decent engineering firm perform this operation. There must be loads on Oz that can do it. I have had them done over here in the UK without much trouble.

[bigjae46]

Any half decent engineering firm perform this operation. There must be loads on Oz that can do it. I have had them done over here in the UK without much trouble.

2 holes XX diameter, same depth as the other two holes, same distance from center.

Is the disc balanced? Meaning the two new holes don't need to be exactly 90 degrees from the others.

[ac427]

2 holes XX diameter, same depth as the other two holes, same distance from center.

Is the disc balanced? Meaning the two new holes don't need to be exactly 90 degrees from the others.

Are they balanced from factory?

I've never seen any marks on them to show they have been balanced as an OEM part and i have two spare vanos assemblies.