Oil filter heads

[86_6series]

I've acquired a 1985 M30 B34 Euro oil cooling set up.

I want to install it onto my 1986 M30 B34 US.

The internal configurations are different.

The bolt and gasket pattern look the same.

Can I just swap the oil head or will I need to fabricate a mod.

There was a post of a needed mod but that was for an M engine.

Also, could someone explain does the oil always flow to the cooler
or is it controlled somehow?

Thanks for all and any input.

Bob V


I'll post on Bimmerforums & Mye28

B34-US.jpg (35.04 KiB) Viewed 3147 times

B34-Euro-2.jpg (151.68 KiB) Viewed 3147 times

[jps635]

I too have a M30B34 with oil cooler. Can't answer your question on the filter head but know they differ as I did replace mine.

The coolers are always open. If you drive in a cold climate, especially short runs I would recommend fitting an oil thermostat - I know Korman sell them. I drive my car all year round but only long runs and it can take 30Km or so for the oil to reach temp, and thats only in a moderately cold winter environment, ie morning frosts and say 8-14 deg C daily highs. When its really cold, oil temp may drop to circa 82-85 when running at open road speeds

I replaced my oil cooler when I rebuilt my engine as I couldn't be sure I could flush it completely so would recommend paying a bit of attention to this.

[Ralph in Socal]

Filter heads are interchangeable for B28, B30, B32 and B34 motors.

I have a couple of the cooler head units and they have a thermostatically controlled port to allow cooling when oil gets to a certain temp. The coolers themselves are always open.

Ralph

[86_6series]

Thanks for the info.

The lower photo, the euro head has the bypass and temperature controlled valve.

Looks like a direct swap.

[brickwhite]

this was on my m88/3 on my m635csi