Engine Casing

hubertjg · Post by **hubertjg** » Fri Sep 30, 2011 12:39 pm

Hi to all,

I just had my engine casing and gearbox casing bead blasted, came out 100%!
Does anyone know what I can seal the raw aluminium with? As it seems to pick up oil and dirt stains very quickly. I know it depends on the tempretures, but I do not know the max the engine runs at!
Any advise or insight will be appriciated as I do not want to ruin a brand "new" engine!

Thanks

Darryl.Richman · Post by **Darryl.Richman** » Fri Sep 30, 2011 3:32 pm

The usual suggestion is to wipe the cases with WD-40 every now and again to keep them from oxidizing.

I would not recommend clear coating the cases; the one attempt at this I saw yellowed within a couple years and started chipping off. The aluminum really changes size when it gets warm.

schrader7032 · Post by **schrader7032** » Fri Sep 30, 2011 3:43 pm

Not to mention that the rough nature of the casting helps to increase the surface area for allowing heat to be drawn from the casting. Anything that is done to overly fill in or defeat this surface texture can hamper that effect.

Wynand · Post by **Wynand** » Fri Sep 30, 2011 4:47 pm

I think the Barrington manuel recommends rubbing with petroleum jelly.

hubertjg · Post by **hubertjg** » Sat Oct 01, 2011 1:34 am

I will definately try the w40, I never thought of that, thats why I love this forum! Thanks guys,
PS Wynand, won't jelly make it shine?

Wynand · Post by **Wynand** » Sun Oct 02, 2011 7:38 am

The petroleum jelly acts as a solvent for the grease and dirt on the aluminium pores and can be wiped away when the engine has become warm. It therefore acts as a cleaner and protector. Try a small section and see how it looks/works for you.

sonofrust · Post by **sonofrust** » Sun Oct 02, 2011 11:32 pm

The Barrington manual does say that bead blasting the case can be dangerous, as any blast residue can really screw up your engine if it remains inside. I'd read those admonitions before proceeding. Once assembled, it's easy for me to keep a clean casting nice with an occasional wash using Simple Green. A brass wire brush with WD40 works on whatever the green cleaner leaves behind. Personally, I like when the case gets some of it's dark patina back after some use. Good luck!

karl_dahlquist · Post by **karl_dahlquist** » Thu Oct 06, 2011 8:21 am

The prior owner of my 1956 R60 polished the front cover of the engine. Is there a way I can restore the original finish/texture so it matches the rest of the engine and transmission?

miller6997 · Post by **miller6997** » Thu Oct 06, 2011 11:42 am

You can dull it down, but the problem is that the blasting smooths out the irregularities, or pores, that give it its distinctive appearance. It will never match the rest of the motor. Watch ebay. Sooner or later a good one will show up. I snagged one for my brother's R50 for under a hundred dollars.

hubertjg · Post by **hubertjg** » Mon Oct 10, 2011 4:21 am

It shows you must be on the forum daily,
Before reading the post from sonofrust, I proceeded, and happy days!, there is residue in my motor, I am scratching head about cleaning it, I thought of parafine, rinsing it a few times, any thoughts on that.
I can kick myself, but I suppose thats the school fees for a new enthusiast!!

Vintage BMW Motorcycle Owners

Engine Casing

Engine Casing

The usual suggestion is to

Not to mention that the rough

I think the Barrington manuel

I will definately try the

The petroleum jelly acts as a

The Barrington manual does

Can an engine cover be "unpolished"?

You can dull it down, but the

Hi Guys