Area Representative DarrenS Posted October 21, 2014 Area Representative Share Posted October 21, 2014 Any recommendations of an engineering mechanic for the fitting of a helicoil in the dry sump pan, (scavenge pipe flange bolt 5mm x 20mm cap head)Glasgow area Thanks Darren Link to comment Share on other sites More sharing options...
SM25T Posted October 21, 2014 Share Posted October 21, 2014 Don't know the detail of the application .... but could you drill and tap M6 if it is an M5 thread that has stripped ? Link to comment Share on other sites More sharing options...
Area Representative DarrenS Posted October 22, 2014 Author Area Representative Share Posted October 22, 2014 Thanks for response SM25T I wouldnt over drill / tap bigger thread as wouldnt want to reduce further the edge distance of the 'soft' ali, unless no other choice My next move would be to by a heicoil kit, but also aware of my limitations! any pointers re engeering firms in glasgow area would be appreciated Link to comment Share on other sites More sharing options...
SM25T Posted October 22, 2014 Share Posted October 22, 2014 Can you take the stripped part off the car ... to be able to take it to a repairer ? Link to comment Share on other sites More sharing options...
SM25T Posted October 22, 2014 Share Posted October 22, 2014 I have just sent an enquiry to a friend in an engineering workshop near you. Watch this space. Link to comment Share on other sites More sharing options...
Area Representative DarrenS Posted October 22, 2014 Author Area Representative Share Posted October 22, 2014 Yes dry sump could be off in minutes Link to comment Share on other sites More sharing options...
oldbutnotslow Posted October 22, 2014 Share Posted October 22, 2014 The fitting of a helicoil really is quite simpleFor an M5 bolt you need a 5.1mm drill bit which if you buy a kit comes with it. You get a tap which you use to cut the thread in the drilled out hole and a tool to insert the helicoil with. It should take no more than 10 to15 mins tops to do it. Indeed I have a kit and some inserts and I am happy to send it to you so that you can DIY. Link to comment Share on other sites More sharing options...
Roger King Posted October 22, 2014 Share Posted October 22, 2014 Helicoil is most definitely not a poor repair. Indeed, we used to helicoil all important threads on the 420R Formula 2 engine from new, because when done properly they are stronger than a thread cut directly into aluminium. Link to comment Share on other sites More sharing options...
Bricol Posted October 23, 2014 Share Posted October 23, 2014 I agree it's not a poor repair, but I hesitate to say they are stronger - even Bollhoff Armstrong don't claim that. What they are is more wear resistant to repeated use. We helicoil everything that is going to see repeated dismantling, and don't bother elsewhere.If you take a decent aluminium alloy, drill and tap a selection of threaded holes, then wind suitably sized cap head screws into them, you will find the cap head screw shears before the (new, unworn) thread shows any sign of pulling out of the alloy. We did exactly that test to see if we could save time and expense of fitting them - we used to fit several thousand in each machine - we don't now.Bri Link to comment Share on other sites More sharing options...
SM25T Posted October 23, 2014 Share Posted October 23, 2014 Morning. Excuse the lack of carriage returns ! Spoke to my pal in Glasgow. They are specialist aluminium welders. He said a helicoil kit would cost £40-£50. Suggested they could fill the hole with weld then drill and tap M5. Cost around £20. Give Stevie Thomson a call. See contact details on http://stsspecialistservices.co.uk/contact Tell him Ian James sent you ! Link to comment Share on other sites More sharing options...
SM25T Posted October 23, 2014 Share Posted October 23, 2014 PS .... hope you speak the language !!!!!! Link to comment Share on other sites More sharing options...
Paul Deslandes Posted October 23, 2014 Share Posted October 23, 2014 These kits are a lot cheaper than the branded Helicoil items but are very easy to use and just as reliable for your application. http://www.workshopping.co.uk/category/helicoil-type-kits-metric-standard-coarse/1856/ Check that you have specified the correct thread which is likely to be M5 'coarse'.They're very easy to use provided you follow the instructions but you do need to make sure that the hole is drilled and tapped true, i.e. perpendicular to the surface.. The best way to ensure this is to use a pillar drill rather than by eye with a hand drill. Any local engineering firm will do it for you, probably in the lunch hour for coffee money.Paul Link to comment Share on other sites More sharing options...
SM25T Posted October 23, 2014 Share Posted October 23, 2014 From another contact in Grangemouth ... Hi Ian. We don't have anything so small here. However. We use a company in Glasgow. Called west of Scotland engineering. Tel 0141 959 8800. If you ask for david and say we (BTS Engineering) put you on to them he should be able to help. Rgds. Gary Link to comment Share on other sites More sharing options...
Area Representative DarrenS Posted October 23, 2014 Author Area Representative Share Posted October 23, 2014 Thanks guys, will take some time to consider all the responses, and recommendations.Unbelievable response, what a great community, have had my car about 21yrs now, spirit seems stronger than ever cheersDarren Link to comment Share on other sites More sharing options...
Birkin S3 ZA. Posted October 26, 2014 Share Posted October 26, 2014 I would suggest you do not have it welded and retapped, the welding makes the aluminum soft and you will still have to fit a insert to make the threads strong enough again.I do lots of this kind of repairs for motorbike shops even fitting a 5 mm helicoil can be a problem, you have to break the tab off once installed and if its done wrong and the insert bends as it breaks off then the bolt will jam in the threads.I never have a problem with larger inserts 8mm plus, the better inserts are the timesert http://www.timesert.com/html/mtrcsert.html its a solid inset and not like a spring made from a strong alloy.Chris. Link to comment Share on other sites More sharing options...
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