Cleaning the engine, transmission and final drive

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srankin
Posts: 100
Joined: Fri Jul 14, 2017 8:45 pm
Location: Spencerport, NY USA

Re: Cleaning the engine, transmission and final drive

Post by srankin »

I tried the soda and it gave mixed results. On my carbs it did great, on the engine block great. On the final drive, it would not budge the gray oxidation.

Brook R, says something in his recent rebuild thread on MOA about Auto sol solution. I may give it a try. I have also seen an internet post about vinegar water solution. Hey, it is cheap and I have enough to try a spot check. St.
Owner of a 84, R80RT and 78, R100RS

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palica
Posts: 34
Joined: Sun Jun 28, 2020 10:22 am
Location: Montreal, Qc, Canada

Re: Cleaning the engine, transmission and final drive

Post by palica »

Autosol works well on polished aluminum but not really on castings. You can give it a try but... And the Autosol will leave a black film that will need to be cleaned (even on polished surface). Once again, WD40 will remove that in a few seconds.
1967 R50/2 with Duna sidecar
1974 R90S

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srankin
Posts: 100
Joined: Fri Jul 14, 2017 8:45 pm
Location: Spencerport, NY USA

Re: Cleaning the engine, transmission and final drive

Post by srankin »

Reading online, about vinegar or lemon juice used as a cleaner. Hey, I have vinegar and it is cheap. LOL,

I appreciate the replies, maybe I am just getting too carried away. After all, what do I expect from a 36 year old bike with 214K miles which is ridden in all kinds of weather including winter with salt on the roads?

I guess I am fussy, LOL. What has started out as a minor cosmetic rebuild is now a full blown overhaul. Stuff that looked OKAY while on the bike hidden, doesn't look so good off the bike. To add to it is Brook Ream's thread on the BMWMOA site of his rebuild of an 83 bike. The before and after pictures are amazing.

Oh well, it will be what it will be when I get done, not as pretty as Brook's bike but far better looking than it was and not as bad as some. Cheery bye, St.
Owner of a 84, R80RT and 78, R100RS

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jwonder
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Joined: Wed Nov 23, 2016 7:50 pm

Re: Cleaning the engine, transmission and final drive

Post by jwonder »

WD40 to clean all the dirt and grime and as a de-greaser. Once degreased start it up (or use the torch to heat the block up) and let the WD40 smoke off. Once WD40 is off, I use the following https://www.amazon.com/dp/B000RZPNNW/re ... BFbMPSG82N 3m product but I have heard Autosol is fine too. I like the 3m product, put it on with a NYLON brush and cover the painted parts.

If the motor is out of the frame I soda blast them.
James Wonder
1967 R69S, 1966 R50/2, 1965 R27, 1963 R27, 1952 R51/3 and 2018 R1200GS

Andey
Posts: 62
Joined: Wed Sep 02, 2020 12:45 am

Re: Cleaning the engine, transmission and final drive

Post by Andey »

Just did a mornings cleaning with WD40 and brass brushes and wiping every 2 minutes... works a treat to get the grey chalking and pitting out... definitely the most effective method for me.

Needs a lot of elbow grease though.

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srankin
Posts: 100
Joined: Fri Jul 14, 2017 8:45 pm
Location: Spencerport, NY USA

Re: Cleaning the engine, transmission and final drive

Post by srankin »

With a LOT of scrubbing, using mineral oil parts washer fluid, Simple Green and finally the 3M aluminum paste, I have things where I want them to be.

FYI, the soda blasting experiment was a nightmare, that stuff got everywhere in the engine requiring a complete tear down to bare block in order to clean it all out. Some of it dissolved with parts cleaner, some didn't but caked into places in the block. Bottom line for me was I was dumb and lazy and it cost me big time. DON"T blow an abrasive powder into your engine thinking it will flush out easily, it won't! Next time I blast with any kind of medium, the parts will be down to the bare block or shell. I think I will make a sign for on my tool box for that. Cheers, St.
Owner of a 84, R80RT and 78, R100RS

kirkpatrick3890
Posts: 39
Joined: Fri Oct 27, 2006 3:00 am

Cleaning the engine, transmission and final drive: Simple Green BBQ Cleaner

Post by kirkpatrick3890 »

I have had great success cleaning alloy parts using
Simple Green Heavy Duty Barbecue & Grill Cleaner. It's in an aerosol can.

Don't let it sit for long, rinse it off with water, and use it on cool parts.
Mac Kirkpatrick
President, VBMWO

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