Alexander Gurr Posted October 13, 2011 Share Posted October 13, 2011 So today I spent all day trying, only partially successfully to get a pair of tillets into the car. The passengers side is now fixed, but the drivers side is only partially there. I have secured and tightened the bolts going through the front of the runners, but for the life of me cant see how I can get any sort of alum key on the bolt going through the runner at the back of the seat. Without being able to hold it in place the nyloc nut just spins the bolt. Is there a trick to this, or do I just remove the nyloc nut from the rear bolts, put a plain nut on and threadlock it in place from underneath 🤔 Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted October 13, 2011 Leadership Team Share Posted October 13, 2011 Put a plain nut on first before offering up to the car - this will lock the bolt solid and hardly increase the seat height anything noticeable Stu. Link to comment Share on other sites More sharing options...
tbird Posted October 13, 2011 Share Posted October 13, 2011 Stu, I will also need to fit some tillets soon and was wondering how to get the rear fastned, I presume you are saying lock the bolt to the runner with a nut under the runner, does this not dramaticaly increase the stress on the floor, or is it strong enough at that point not to matter, haven,t really had a proper look yet Its just occured to me if someone made Bolts with a hex head on one end and a Torx/hex skt on the other end it would make jobs like this so much easier Tim Edited by - tbird on 13 Oct 2011 23:43:17 Link to comment Share on other sites More sharing options...
6speedmanual Posted October 13, 2011 Share Posted October 13, 2011 Tim, yes, it would increase the load on the thin ali floor to a very small area around the hole. Will soon crack or distort downwards. Alexander, It sounds as if you are still using the adjustable steel runners? A really good fis for the problem is to braze or weld the bolt into the runner. Makes fitting and removal a doddle. (braze is more reversible if you ever need to replace a bolt, for example if it gets mashed going bumpy bumpy over kerbs etc :-) ) Alternatively, if it is only to fit one driver, use the fixed ali box section runners. Peter Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted October 14, 2011 Leadership Team Share Posted October 14, 2011 No it doesn't increase the stress on the floor ...... because you still fit an oversize washer between the runner and the floor as previously (If you weren't intending to use an oversize washer below the runner you'll usually find the seat runner doesn't function smoothly). Or use the plastic Tillett spacers. It's also preferable to fit Tilletts jacked up slightly at the front (mine are 25mm higher front than back) otherwise you'll get a very upright seating position. Stu. Link to comment Share on other sites More sharing options...
Alexander Gurr Posted October 14, 2011 Author Share Posted October 14, 2011 Thanks guys. I haven't put any washers between the runner and the floor, so looks as though the drivers seat will have to come out again. Just a thought, but why wouldn't you just use a plain nut on the underside of the floor rather than the nyloc nut? You could threadlock it on, or even put a nyloc nut on afterwards. Cheers, Alex Link to comment Share on other sites More sharing options...
Area Representative Nick Chan Posted October 14, 2011 Area Representative Share Posted October 14, 2011 I use an Allen key socket on a long extension with a socket wrench. If you are gentle, the wrench locks against back panel as you tighten the nut. It might be a good idea to trial fit the nut on the bolt a few times to ease the thread through the nyloc part. Doing the brazing trick though that Peter suggests is very handy though and makes refitting the tillet in my academy car a doddle and just a few seconds to tighten up Nick Link to comment Share on other sites More sharing options...
tbird Posted October 14, 2011 Share Posted October 14, 2011 Stu, Peter, Nick thanks, all grist to the mill Tim Link to comment Share on other sites More sharing options...
GPBox Posted October 14, 2011 Share Posted October 14, 2011 Here was my cunning plan.......... you need new nuts/bolts (M5 ?...big enough to fit in snugly in lower channel to stop head turning) anyway NOT nylok (they need to easily screw together)... Place the bolt in the lower channel - so the bolt head sits snugly in the bottom channel slide the upper channel back over the bolt, place about 2" of old hose pipe into the channel above the bolt, this will hold the bolt tight into the lower channel.... repeat above for all four bolts Place the seat in the car (its a bit of a pain aligning holes etc) Once all four bolts are sticking thru' the bottom of the car, spin the nuts up onto the bolts.... The hose pipe can be left in-situ.... worked a treat for me ! Graham Edited by - GPBox on 14 Oct 2011 17:52:05 Link to comment Share on other sites More sharing options...
6speedmanual Posted October 14, 2011 Share Posted October 14, 2011 MSA/FIA regs require seat fixings to be 5/16" or 8mm. Link to comment Share on other sites More sharing options...
GPBox Posted October 14, 2011 Share Posted October 14, 2011 yeh its probably M8........the biggest bolt head you can fit ii the channel...... Link to comment Share on other sites More sharing options...
whatsup Posted October 14, 2011 Share Posted October 14, 2011 whip the seats out, find a local welder, have the 4 bolts tacked to the runners touch of paint, refit tighten nuts. down the pub for a pint, seats can then be removed and refitted in minuets. Link to comment Share on other sites More sharing options...
Z3MCJez Posted October 14, 2011 Share Posted October 14, 2011 I found that if you pulled downwards a bit on the bolt as you tightened it, it stayed in place. It's not a great design. I also opened the holes out a bit to make fitting easier. However, don't worry about it too much. You'll probably end up with a foam or bag seat if you are more than about 5' 7" (and you may want one anyway, for the additional support in a crash). Jez Link to comment Share on other sites More sharing options...
duffield Posted October 16, 2011 Share Posted October 16, 2011 First of all have some larger stainless steel washers made, 40 mm diameter 3 mm thick with an 8.5mm hole in them. Throw the caterham ones away, they are not strong enough to give the floor support. get some new M8 bolts just long enough so to get the nut filly on using the new washers. The originals are too long. Have the bolts tack welded in position with one stitch per bolt (TIG), no more. Paint with a little hammerite smooth and put them in. Put the st/st washer on and tighten the nylocks, job done. Glad to help you with washers and welding if your in my area? Link to comment Share on other sites More sharing options...
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