welbike Posted March 26, 2021 Share Posted March 26, 2021 I don't know for Triumph, but usually early bikes had matt or satin chrome, after 1942 or so it was cadmium plated. Looks dull chrome in this picture. Lex Quote Link to comment Share on other sites More sharing options...
Ron Posted March 26, 2021 Share Posted March 26, 2021 Cadmium or Dull chrome pawel. Tinning with solder makes a good substitute. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted March 26, 2021 Author Share Posted March 26, 2021 Thanks. I have quite a few old parts without coating, only copper or brass. The new copies are made of shiny chrome. 😬 That's why I asked because I wasn't sure. I'll give mine for the galvanization. After a year, they patina on the mat. The valve springs came from Austria in original Terrys packaging. Collar from Zundapp slightly reworked to fit inch dimensions. I'm assembling the engine tomorrow !!! Unless the wife comes up with other, more important home and garden tasks. ☹️ Cheers Paul Quote Link to comment Share on other sites More sharing options...
Ron Posted March 26, 2021 Share Posted March 26, 2021 Good quality Chrome plating can be lightly/gently grit blasted to dull chrome. I've done it lots of times using medium aluminum oxide grit. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted April 1, 2021 Author Share Posted April 1, 2021 Another problem arose when assembling the engine. The diaphragm (E1469) is missing in the crankcase breather. I don't know how it is constructed or what it looks like. Is this sleeve in the middle of the body (E1466) a plug (E1464)? Do you have better photos of these items? Parts from mine in the photo. Regards. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted April 1, 2021 Share Posted April 1, 2021 It's usually the case that the diaphragm is missing, I think they just corrode away? It's best sorted now because it's impossible to get to without stripping the primary case off. Brian Tillin has a knack to repair these and should be able to give you details or parts. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted April 1, 2021 Author Share Posted April 1, 2021 Thanks. The diaphragm its missing in both engines. Brian it is good idea. Pawel Quote Link to comment Share on other sites More sharing options...
pawelcen Posted May 24, 2021 Author Share Posted May 24, 2021 (edited) Hi, Brian is a good idea if he writes back. Unfortunately, valve collars from Zundapp was not a good idea. After folding, it turned out that the valve springs are not compressed enough. I made technical drawings and commissioned collars and split cotter to be made in small series. The split cotter have been hardened. IN its old, original. EX its new. After folding, everything fits. Pawel Edited May 24, 2021 by pawelcen Quote Link to comment Share on other sites More sharing options...
pawelcen Posted May 24, 2021 Author Share Posted May 24, 2021 Hi, The breather nozzle in sleev nut was missing from the engine. Probably some genius mechanic had decided that it was unnecessary earlier. Fortunately in the parts that were left over after the renovation from 1987of the civilian version. My dad gave me new parts and I hid the old ones. Fortunately, he made two diaphragms. Today, the old nut and the new diaphragm have found their place in the engine for the military version. Works perfectly as a one-way valve. Regards Paul. Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 9, 2021 Author Share Posted June 9, 2021 Hi Ron, I once got a picture of your engine. Is there any seal between the tube on the timing cover and the crankshaft? I have nothing. Greetings Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted June 9, 2021 Share Posted June 9, 2021 No seal Pawel. The quill is far enough up the shaft to deliver plenty of oil and it doesn't matter if some spills backwards. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 9, 2021 Author Share Posted June 9, 2021 Many thanks Ron. Pawel Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 10, 2021 Author Share Posted June 10, 2021 Hi. Slowly, the engine overhaul is coming to an end. Pawel 1 Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 Hi, Triumph engine ready to run. The carburetor is also waiting. Unfortunately, work on the chassis slowed down. Greetings Pawel Quote Link to comment Share on other sites More sharing options...
welbike Posted June 24, 2021 Share Posted June 24, 2021 Nice! don't forget to remove the rag from the inlet, before fitting the carb! Lex Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 While working with the Triumph fuel system, I reconstructed the fuel pipes in my NSU 501OSL and Quick to their original condition. The big NSU lights up and works. There is a problem with gear shifting (adjustment). Quick needs a little more work. Regards Pawel 1 Quote Link to comment Share on other sites More sharing options...
welbike Posted June 24, 2021 Share Posted June 24, 2021 I still have to finish this OSL251 from 1936. Only wiring and cables to do. Lex Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 I forgot to add photos of U-pipes for Triumph. And repaired petrol tap for Quick with new cork seal. Lex, I d'nt forget. 😁 Thank you. Pawel 1 Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 Lex, in Poland there is a forum devoted only to the NSU. You can write in English. I am sending the link: https://www.nsu-riders.pl/phpBB3/index.php A nice copy from before the war with open valves. Were the valve springs as shown in the photo? Pawel Quote Link to comment Share on other sites More sharing options...
welbike Posted June 24, 2021 Share Posted June 24, 2021 OK, thanks! I think the valves were open on these models, you can see it in the second picture. Lex 1 Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 I admire the enormous amount of work. I meant were the springs spiral? Mine should be flat (?) but cracked and replaced with a newer spiral model. Quote Link to comment Share on other sites More sharing options...
welbike Posted June 24, 2021 Share Posted June 24, 2021 (edited) Ah, you mean the hairpin (Haarnadel ventil-Feder in German) springs, yes the bigger models had them, but not the smaller ones, the OSL 201,251 and 351. Lex Edited June 24, 2021 by welbike additional info Quote Link to comment Share on other sites More sharing options...
pawelcen Posted June 24, 2021 Author Share Posted June 24, 2021 (edited) I already thought that the one that was run over by the tank is yours. This is the big model 351 or 501. Uffff.....🤣 How was your 251 in condition before overhaul? Pawel Edited June 24, 2021 by pawelcen Quote Link to comment Share on other sites More sharing options...
welbike Posted June 24, 2021 Share Posted June 24, 2021 No the run over one, is just a wartime picture, that's not my bike! here a picture before restauration, a lot of work was done by the previous owner, but terrible colours, I found a WaffenAmt stamp on the engine, so made it WH. Lex Quote Link to comment Share on other sites More sharing options...
Ron Posted June 24, 2021 Share Posted June 24, 2021 The bloke got carried away with the yellow paint on the valve springs😝 Ron 1 Quote Link to comment Share on other sites More sharing options...
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