facthunter Posted February 3, 2016 Share Posted February 3, 2016 There are a lot of different bronzes. Some of them would only be good for electric motors and light duty. Others are so hard you can only get a finish on them with a diamond conrod borer. Nev 2 Link to comment Share on other sites More sharing options...
IBob Posted February 3, 2016 Share Posted February 3, 2016 I'd be Chary about nylon too... I had a MGF, needed to watch the temp since the thermostat was on the inlet not the outlet and the head gasket locating pins were nylon. Fine for the little Metro town commuter car the engine was designed for originally, in the Lotus and the MGF there were lots of melted pins and walking gaskets due to overheating and then shock cooling when the thermostat opened. I think folk write 'nylon', meaning 'some sort of plastic'. Nylon would be unsuitable in all sorts of ways, these are one of a number of synthetic bearing materials, probably Vespel. Nylon they definitely aint! http://www.dupont.com/products-and-services/plastics-polymers-resins/parts-shapes/brands/vespel-polyimide/products/vespel-s.html Link to comment Share on other sites More sharing options...
IBob Posted February 3, 2016 Share Posted February 3, 2016 I think folk write 'nylon', meaning 'some sort of plastic'. Nylon would be unsuitable in all sorts of ways, these are one of a number of synthetic bearing materials, probably Vespel. Nylon they definitely aint!http://www.dupont.com/products-and-services/plastics-polymers-resins/parts-shapes/brands/vespel-polyimide/products/vespel-s.html Gives some interesting figures for those who like some specifics: http://www.dupont.com/content/dam/dupont/products-and-services/plastics-polymers-and-resins/parts-and-shapes/vespel/documents/E61500.pdf Link to comment Share on other sites More sharing options...
Kiwi303 Posted February 4, 2016 Share Posted February 4, 2016 Well, they may well have meant some other plastic, I was talking about nylon itself tho :) Nylon has a melting point above 400F/200C depending on the type of nylon. which tells you how much the MGF and Lotus would overheat by. I'm sure the Rotax bushings have better wear stats than Nylon does, through some nylon composites are pretty interesting . 1 Link to comment Share on other sites More sharing options...
ozbear Posted February 4, 2016 Share Posted February 4, 2016 I think it's all rubbery figures 1 Link to comment Share on other sites More sharing options...
Ayecapt Posted February 13, 2016 Author Share Posted February 13, 2016 Hi all Engine has been re assembled , re installed , ground tested for around 30 minutes , carbs balanced etc. Heading out to the airfield this morning with the intention of further ground runs at run up revs. Then recheck all is well before take off. Out of all this on the positive side we have a engine that is as close to reconditioned as you can get when its got 1300 hrs on it. Some annoying oil leaks have been attended to , mainly the starter motor oil seal , 5 year rubber replacement is complete. And best of all there is no more brass in there ! Our L2 has done a great job on the overhaul . And i have learnt heaps about Rotax 912 engines in the process. I will post a photo of the 8 offending bushes after i string them together to add to the flying clubs Christmas decorations . Will be a reminder each year as they are hung up. 1 1 1 Link to comment Share on other sites More sharing options...
storchy neil Posted February 13, 2016 Share Posted February 13, 2016 still got the offenders :cops:I assumed they would be where the sun don't shine :oops:neil 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now