BMW R35 (1938) resurrection

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wa1nca
Posts: 675
Joined: Thu Sep 27, 2012 5:15 pm
Location: Ashfield Ma

R35

Post by wa1nca »

Nice start
The best part is putting it back together and then to enjoy all the hard work as you ride it
Always brings a smile on you face on each and every ride

Tommy
Tommy Byrnes
54 R51/3 55 R50 64 R27 68 R69US

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luca.stere
Posts: 88
Joined: Thu May 23, 2013 4:11 am

First part of disassembling

Post by luca.stere »

First part of disassembling the engine: https://www.youtube.com/watch?v=xMeC6SuiTus&t=359s
Last edited by luca.stere on Sun Aug 09, 2020 1:32 am, edited 1 time in total.

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luca.stere
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Joined: Thu May 23, 2013 4:11 am

The second part of

Post by luca.stere »

The second part of disassembling the engine: https://www.youtube.com/watch?v=HlH5axRmBoI
Last edited by luca.stere on Sun Aug 09, 2020 1:32 am, edited 1 time in total.

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luca.stere
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The third and the last video

Post by luca.stere »

The third and the last video part disassembling the engine: https://www.youtube.com/watch?v=veF1jxux_tc&t=511s
Last edited by luca.stere on Sun Aug 09, 2020 1:33 am, edited 1 time in total.

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luca.stere
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Joined: Thu May 23, 2013 4:11 am

This is the engine housing

Post by luca.stere »

This is the engine housing but this is not the one I will use for this bike:





Attachments
bmw-r35_5.jpg
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bmw-r35_4.jpg
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bmw-r35_3.jpg
bmw-r35_3.jpg (1.13 MiB) Viewed 208 times
bmw-r35_2.jpg
bmw-r35_2.jpg (990.26 KiB) Viewed 208 times
bmw-r35_1.jpg
bmw-r35_1.jpg (1.15 MiB) Viewed 208 times

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luca.stere
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This is the crankshaft, it

Post by luca.stere »

This is the crankshaft, it has some play and as you can see in the videos the pin piston bush has also some play in the inner (0.10mm) and also for the outside diameter. I will check also the crankshaft with some measuring tools:



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bmw-r35_10.jpg
bmw-r35_10.jpg (512.45 KiB) Viewed 208 times
bmw-r35_9.jpg
bmw-r35_9.jpg (1.08 MiB) Viewed 208 times
bmw-r35_8.jpg
bmw-r35_8.jpg (1.25 MiB) Viewed 208 times
bmw-r35_7.jpg
bmw-r35_7.jpg (1.05 MiB) Viewed 208 times
bmw-r35_6.jpg
bmw-r35_6.jpg (1.2 MiB) Viewed 208 times

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luca.stere
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BMW R35 doesn't have

Post by luca.stere »

BMW R35 doesn't have slingers, in the front the crank has a bronze bearing and receive the oil pressure thru that part like the modern engines does. It is a sort of mixt lubrication on the crank, the rear ball bearing 6207 is lubricated by splash oil and the bronze bearing and conrod bearing are lubricated by oil pressure.

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luca.stere
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This is the rear housing

Post by luca.stere »

This is the rear housing crankshaft support, as you can see it has a felt seal:
Attachments
bmw-r35_31.jpg
bmw-r35_31.jpg (433.53 KiB) Viewed 208 times
bmw-r35_32.jpg
bmw-r35_32.jpg (365.18 KiB) Viewed 208 times
bmw-r35_33.jpg
bmw-r35_33.jpg (198.88 KiB) Viewed 208 times

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wa1nca
Posts: 675
Joined: Thu Sep 27, 2012 5:15 pm
Location: Ashfield Ma

Crankshaft

Post by wa1nca »

Enjoy you posting this project

I see no oil slinger of the crankshaft

does the r35 not have a oil slinger to clean the oil
Tommy
Tommy Byrnes
54 R51/3 55 R50 64 R27 68 R69US

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luca.stere
Posts: 88
Joined: Thu May 23, 2013 4:11 am

The cylinder is an after war

Post by luca.stere »

The cylinder is an after war one, produced after 1945 and we will use another one produced before the war. This one is in a good shape, has all the fins and the diameter is 72mm.
Attachments
bmw-r35_23.jpg
bmw-r35_23.jpg (227.67 KiB) Viewed 208 times
bmw-r35_22.jpg
bmw-r35_22.jpg (304.2 KiB) Viewed 208 times
bmw-r35_21.jpg
bmw-r35_21.jpg (339.88 KiB) Viewed 208 times

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