k80rum Posted July 12, 2009 Share Posted July 12, 2009 What's the recommended way of fitting the injector port blanking plugs? Are they just an interference fit and you drift them in or is it a good idea to seal them with anything when fitting? Mine seem a close fit but don't really seem to need pressing home which I'm a bit concerned about. Having never fitted any to a head before I'm not sure what the norm is.. Darren E K80 RUM Website and Emerald maps library Home of the long-term, supercharged Duratec project Link to comment Share on other sites More sharing options...
rj Posted July 13, 2009 Share Posted July 13, 2009 Darren, Might be an idea to tell what engine etc I haven't got a clue about the Duratec, but you need to ensure they are absolutely air tight. If it's made in a way similar to the Jenvey TB's I'd probably turn out a plug from alloy with a groove for an O-ring, but that's without knowing what your engine actually looks like. Link to comment Share on other sites More sharing options...
k80rum Posted July 13, 2009 Author Share Posted July 13, 2009 Hi Regin, Sorry, I assumed it was fairly universal. It is indeed a Duratec and I'm blanking off the injector ports in the head because I've put the injectors in the Jenveys. The ports themselves are just 15mm(?) holes for standard injectors. A quick and dirty solution would be to use the redundant Ford injectors to fill the holes with old the fuel rail to hold them in place. I'd like something a bit neater though and Raceline supplied me with a set of machined plugs to fit the holes but as I say, the tolerance seems a bit generous. They're very simple aluminium blanks, about 10mm in height. I'd sealed them to keep them airtight as you say but I suppose they need to be a very tight fit rather than sealed or if any backpressure from valve overlap could cause them to pop out I can always give Raceline a ring this week as a last resort but the question hadn't been asked on BC before so I thought I'd pose it. I'll dig the micrometer out to compare the hole and plug sizes and perhaps ask for some replacements. PS did you get my reply to your last email? Not that I was expecting a reply but sometimes things don't make it past our keen corporate mailfilter Darren E K80 RUM Website and Emerald maps library Home of the long-term, supercharged Duratec project Edited by - k80rum on 13 Jul 2009 07:48:39 Link to comment Share on other sites More sharing options...
rj Posted July 13, 2009 Share Posted July 13, 2009 Yes, and I replied to it Will re-send from another account. There's hardly any pressure there. If there is you're in bigger trouble than the blanking plugs popping out If you have the old injectors I suppose you also have the O-rings? If so I could machine out some plugs that will accept the O-ring for you. /r Link to comment Share on other sites More sharing options...
Normans_Ghost Posted July 13, 2009 Share Posted July 13, 2009 Are these plugs domed, in other words are they core plugs? If so get some red lead to apply to the edge and then hit the centre dome and they will spread to an air pressure tight fit. Norman Verona, 1989 BDR 220bhp, Reg: B16BDR, Mem No 2166, the full story here You and your seven toThe French Blatting Company Limited Link to comment Share on other sites More sharing options...
Jason Plato Posted July 13, 2009 Share Posted July 13, 2009 epoxy here is my Duratec R .... C7 TOP Taffia joint AO with Al Link to comment Share on other sites More sharing options...
rj Posted July 13, 2009 Share Posted July 13, 2009 Dave, Most epxy does not like being exposed to petrol. Link to comment Share on other sites More sharing options...
Irrelevant Posted July 13, 2009 Share Posted July 13, 2009 This for an atmo or blown motor? Atmo should be fine with normal plugs (which will get sucked in anyway). A blown motor needs to handle maybe 2+ bar of boost so needs proper sealing. For a permanent seal, I'd either JB Weld / tig weld the plugs in. Of course if you want to use the ports in the future (maybe to go 8 injector or something) you'll need to make something that bolts down to hold the plugs in. Link to comment Share on other sites More sharing options...
rj Posted July 13, 2009 Share Posted July 13, 2009 It's NA /r Link to comment Share on other sites More sharing options...
k80rum Posted July 13, 2009 Author Share Posted July 13, 2009 Regin: Thank you for the offer of machining them for the O-rings, it's very kind and much appreciated. Norm: They're much thicker than core plugs unfortunately but thanks for the suggestion I've decided to bite the bullet and JB-weld them in. I'd originally used a petrol-resistant Loctite sealant I had, but I'm not convinced it'll remain airtight and I'm never expecting to use the ports in the head again in any case. Because the ports are angled into the head, I don't expect the JB-weld will ever be exposed to much fuel/air mixture but the plugs sit against a smaller seating face in any case. Thanks to you all for your help and suggestions 😶🌫️ Darren E K80 RUM Website and Emerald maps library Home of the long-term, supercharged Duratec project Edited by - k80rum on 13 Jul 2009 12:22:18 Link to comment Share on other sites More sharing options...
dannylt Posted July 13, 2009 Share Posted July 13, 2009 For now . I still have my old injectors in the head; might always need them for an MOT one day. Link to comment Share on other sites More sharing options...
k80rum Posted July 13, 2009 Author Share Posted July 13, 2009 Oh you had to come along and muck it up, didn't you Darren E K80 RUM Website and Emerald maps library Home of the long-term, supercharged Duratec project Link to comment Share on other sites More sharing options...
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