carl0s Posted February 27, 2006 Share Posted February 27, 2006 The three or four bolts at the front of the car which affix the undertray in place have sheared off. This happened a while ago actually, but I'm starting to get fed up of it scraping on speed bumps. I keep tucking it back in place but it comes out again after a while. I have bought a screw-extractor set, but I'm not sure if they'll do the job. Do you think they will? See here: http://www2.css-networks.com/undertray.jpg Look at that rusty bracket! time to get a new one methinks! Link to comment Share on other sites More sharing options...
TLicense Posted February 27, 2006 Share Posted February 27, 2006 The three or four bolts at the front of the car which affix the undertray in place have sheared off. This happened a while ago actually, but I'm starting to get fed up of it scraping on speed bumps. I keep tucking it back in place but it comes out again after a while. I have bought a screw-extractor set, but I'm not sure if they'll do the job. Do you think they will? See here: http://www2.css-networks.com/undertray.jpg Look at that rusty bracket! time to get a new one methinks! If your easy-outs don't work, drill and tap. That bracket only costs a few quid as well. Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted February 27, 2006 Share Posted February 27, 2006 temporary measure.....peice of string through one set of holes over to otherside through other set of holes and tie it in a loop....temporary measure but get it off the floor Link to comment Share on other sites More sharing options...
carl0s Posted February 27, 2006 Author Share Posted February 27, 2006 Thanks Tony. I hadn't considered drilling and using a tap to redo the threads. I suppose I'd have to be careful that I don't cross against the existing threads I suppose. If it's not raining this weekend I'll have a go then. thanks Link to comment Share on other sites More sharing options...
LeeT Posted February 27, 2006 Share Posted February 27, 2006 i drilled and tapped a couple of mine in the exact same place M6 thread Link to comment Share on other sites More sharing options...
TLicense Posted February 27, 2006 Share Posted February 27, 2006 Only when you start tapping it. Once you've got it started, it should be fine. Link to comment Share on other sites More sharing options...
JohnA Posted February 27, 2006 Share Posted February 27, 2006 Mine was like this and at some point the whole undertray broke off on the M25. Had to drill out the bolts, not an appealing job if you haven't got a lift. Link to comment Share on other sites More sharing options...
SimonB Posted February 27, 2006 Share Posted February 27, 2006 If you take the undertray off you might find you can get a pair of molegrips on the other end of the sheared off bolt and take it out from above if you see what I mean. Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 28, 2006 Share Posted February 28, 2006 Centre punch, drill 1/16 hole, drill using 6mm Helicoil insert drill bit, Helicoil, use stainless bolts. That's the best way, if you can be bothered buying a Helicoil kit and corrct drill size, and stainless 6mm bolts. Link to comment Share on other sites More sharing options...
mr keef Posted February 28, 2006 Share Posted February 28, 2006 Make sure ya do get it off the ground tho mate coz after a while it will scrape a hole in. Link to comment Share on other sites More sharing options...
JohnA Posted February 28, 2006 Share Posted February 28, 2006 Also use drills that are the hardest possible, to avoid frustration. I used Cobalt drills for these suckers, HSS or titanium didn't cut it Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 28, 2006 Share Posted February 28, 2006 Never had a problem with decent HSS drills, unless someone else has had a go and got them hot and work hardened them, then it becomes a PITA. Link to comment Share on other sites More sharing options...
carl0s Posted February 28, 2006 Author Share Posted February 28, 2006 I've done all I'm going to do with it for now. My/our (my mums!) drill and bits are shite, and the screw extractor was just spinning in the drill. What's left of these bolts appears to be basically chemically fused in place. I drilled a 4.5mm hole through two of them and have put some of the not-quite-self-tapper type screws in there - you know the ones, those black ones that are used all over the place and have a fixed washer on the head. It'll do for now, and if I think on I'll see how much you'll charge to do it when I come to have my geometry done Chris. Link to comment Share on other sites More sharing options...
JohnA Posted February 28, 2006 Share Posted February 28, 2006 screw extractors....I've tried quite a few of them, NEVER successfully. Waste of space, if you ask me. Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 28, 2006 Share Posted February 28, 2006 screw extractors....I've tried quite a few of them, NEVER successfully. Waste of space, if you ask me. Agreed, the cheap LH thread type will often snap off in the hole you have drilled, and you then have to figure out how to remove a pot hard piece of material, rather than a soft piece of material. In broken studs / bolts of > 8mm the Snap On fluted ones work great, or for the odd job you can drill a hole to take a driven in Torx bit of appropriate size. Not giving away any more trade secrets this week, though Link to comment Share on other sites More sharing options...
JohnA Posted February 28, 2006 Share Posted February 28, 2006 On a related note, I'd like to know how we can get PB Blaster in these shores. Apparenly it kicks ass in the states, but I suspect environmental concerns don't allow it to be sold in Europe. (Like cursing and breaking drillbits is kind to the environment:eyebrows: ) A decent penetrant would help avoid these chores in the first place, wouldn't it? Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 28, 2006 Share Posted February 28, 2006 What is PB Blaster? Sounds like a black singer to me. Link to comment Share on other sites More sharing options...
JohnA Posted February 28, 2006 Share Posted February 28, 2006 It's a penetrating fluid that WORKS I'm not sure if it's kind to skin or helps the flowers grow quicker. I suspect it's toxic, corrosive and vomit-inducing (kinda like my posts) Link to comment Share on other sites More sharing options...
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