Guest Nicholas Posted January 22, 2015 Share Posted January 22, 2015 All, Am I right in thinking this is fine to do, any reason why not? I'm thinking I could use a -8 to m18x1.5 fitting and drill the stock breather holes using a 16.5mm drill bit then a m18x1.5 tap and fit the -8 fittings? Any input is appreciated. Nick. Quote Link to comment Share on other sites More sharing options...
jay200bhp Posted January 23, 2015 Share Posted January 23, 2015 a 16.5 drill bit wont fit in your black and decker mate... you could mill it out and weld it up. ive got a Bridgeport! Quote Link to comment Share on other sites More sharing options...
Guest Nicholas Posted January 23, 2015 Share Posted January 23, 2015 (edited) Thought that might be the case Jay, I don't want to weld it :/ EDIT: - It will http://www.ebay.co.uk/itm/291162055370?_trksid=p2060778.m1438.l2649&var=590311694310&ssPageName=STRK%3AMEBIDX%3AIT Edited January 23, 2015 by Nicholas (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 23, 2015 Share Posted January 23, 2015 I know there is no real stress on the join but there is only about 2mm cover thickness...add to this the slight curvature and not only would you a very weak union it would be hard to stop it seeping oil, much better to weld on a piece of alloy and then drill and tap. Quote Link to comment Share on other sites More sharing options...
heckler Posted January 23, 2015 Share Posted January 23, 2015 best to get ali bungs welded on, rather than tap the covers Quote Link to comment Share on other sites More sharing options...
Scott Posted January 24, 2015 Share Posted January 24, 2015 As above, there's nowhere near enough wall thickness to allow enough pressure to create a good enough seal. Welding is the only safe option. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 24, 2015 Share Posted January 24, 2015 There shouldn't be any pressure on the seal other than mechanical, otherwise you have a serious problem. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 24, 2015 Share Posted January 24, 2015 There shouldn't be any pressure on the seal other than mechanical, otherwise you have a serious problem. I was referring to the pressure on the threads from tightening Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 24, 2015 Share Posted January 24, 2015 I was referring to the pressure on the threads from tightening Fair enough, had me worried for a minute. Quote Link to comment Share on other sites More sharing options...
Scott Posted January 24, 2015 Share Posted January 24, 2015 Fair enough, had me worried for a minute. Better safe than sorry Quote Link to comment Share on other sites More sharing options...
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