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And this is the BEST a Teflon Positive Stop valve stem seal. $ 38. for a set of 8. In stock. Len Fanelli
-----Original Message-----
From: 'Bob Grunau'
grunau.garage@sympatico.ca [mg-tabc] mg-tabc-noreply@yahoogroups.com>
To: 'CLIVE SHERRIFF' csherriff99@gmail.com>; 'Werner Hofstetter' hofstetter.werner@bluewin.ch>
Cc: 'yahoogroups' mg-tabc@yahoogroups.com>
Sent: Fri, Mar 8, 2019 8:39 am
Subject: RE: [mg-tabc] XPAG Pistons and Rings
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Might be the valve seals?? The first TD engine I built in 1958 was horrible smoke, turns out the young idiot who installed the valve seals put them in wrong and the O rings were not trapped by the spring keepers/washer. Horrible smoke!! Yes, that we me. Never again J Bob [b]From:[/b]
mg-tabc@yahoogroups.com [mailto:
mg-tabc@yahoogroups.com] [b]On Behalf Of [/b]CLIVE SHERRIFF
csherriff99@gmail.com [mg-tabc]
[b]Sent:[/b] Friday, March 08, 2019 6:09 AM
[b]To:[/b] Werner Hofstetter
[b]Cc:[/b] yahoogroups
[b]Subject:[/b] Re: [mg-tabc] XPAG Pistons and Rings I've missed some of this threads replies, but for what it's worth getting blue smoke is not unusual after a rebore with new pistons / rings. It usually settles down quickly as the rings wear into the bores. Is it happening on all cylinders ? The plugs should show that. However, with today's highly developed oils this sometimes does not happen. These oils are just too slippery to let the rings wear against our old cast iron cylinder walls and so they don't bed in properly. E.g. Synthetics are not good news for running in on our old engines. Whilst another cause with the rings you are describing is that one or both of the flat rings were twisted on assembly by the machine shop (not too hard to do if you are not used to them as yours seems not to have been) However, if that was OK, then I have on a number of occasions when presented with this blue smoke problem, drained the "Super / Synthetic whatever Oil" out and run the car for a while (500 - 1000 miles) on a straight old fashioned oil without all the additives and the problem has disappeared, usually after just a few 100 miles. Might be worth a try if all else seems OK. Clive Oxford UK m mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm a few K miles.
[img]https://ec.yimg.com/ec?url=https%3A%2F%2Fipmcdn.avast.com%2Fimages%2Ficons%2Ficon-envelope-tick-round-orange-animated-no-repeat-v1.gif&t=1552107431&sig=b85vlGdNRYbcvH38B.WnaA--~D[/img] Virus-free.
www.avast.com After 115'000 kms since the last rebuild 15 years ago, I had my engine honed and rebuilt. Amongst other new items I chose Aerolite Pistons from a large US MG parts supplier. Unfortunately with the result of thick blue smoke coming from the exhaust when accelerating. Now I am looking again for new Pistons (1'250 cc + 0.80) and Rings for fast road use (no racing). My engine shop man did not like the rings that came with the Pistons, in particular the Oil Scraper ring (No. 3) which consists of two separate flat rings with some sort of corrugated springy steel in between. He prefers a solid, slotted ring with a circumferencial spring over a guiding wire behind it. What are the groups view? Any suggestions for Brands/Suppliers? Werner TC 3078 Switzerland
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