1983 BMW R80ST Replace Oil Pan & Oil Pump Suction Flange Gaskets

I show how to replace these gaskets and how to get the oil pan mating surface flat. You can read all the details in this document on my website: brook.reams.me/bmw-motorcycle...

[@assessor1276]

Thanks for sharing Brook. I really enjoy watching your methodical meticulous work habits and I always learn something each time.

[@BrooksAirheadGarage]

You're welcome Assessor 12.

[@steppenwolf5956]

I love the accuracy you work with👍 Best Regards from Germany

[@BrooksAirheadGarage]

Thank you Sreppenwolf.

[@joemahan311]

Awesome technique!

[@BrooksAirheadGarage]

Thank you Joe 🙂

[@bav114]

Great work. A lot of people don’t realise the effect on the torque of lubricant on a bolt.

[@BrooksAirheadGarage]

Indeed, the pan bolts are one place where the difference could get you in trouble.

[@cbbbbbbbbbbbb]

I really appreciate your disassembly and assembly videos. Very clear and informative. I'm planning on using an airhead engine in a project. Do you know which one is the lightest weight? The motor itself, not the bike.

[@BrooksAirheadGarage]

The 1981 and later motors with Nikasil cylinders are lighter weight since the don’t use cast iron cylinder liners.

[@bwr6678]

Clearly you finished with a square/flat surface but when glueing down the sand paper is there any concern that the rubber cement might create ripples or any inconsistencies in the surface? If so how did you mitigate this potential issue?

[@BrooksAirheadGarage]

BWR, I use a thin amount of contact cement. Compared to the surface roughness of the sand paper, it does not cause a high spot in the edge of the paper that prevents getting the surface flat to +/- 0.002 inch. That's plenty flat for getting a good seal with the pan gasket. That said, getting it "dead flat", as you find on a set of machinist parallels is a whole different ball game.

[@docdocdoc777]

Hi Brook, thanks for sharing, do you tighten the bolts somewhere later?

[@BrooksAirheadGarage]

Paul, at 11:16 I have tightened them in the first 2 stages: 25 then 40 INCH-Lbs. No need to show me twisting a socket wrench for a minute or two. 🙂
From there I show tightening the stainless steel bolts to the final 60 INCH-Lbs. To be clear, if you use standard steel bolts, not the stainless steel ones I used, you should torque in three stages to 72 INCH-Lbs.

[@bav114]

Hooray!! The awful paint has gone 🙂

[@BrooksAirheadGarage]

Dave, Indeed, that last bit of that orange was on the valve covers and I bead blasted that off a couple days ago. The motor is beginning to look more like it did on the showroom floor. 🙂

[@mysticapprentice]

I too was so relieved to see it back from vapor blasting, excellent!