Tidy_Andy 0 Posted April 9, 2006 Anyone had any experience with this? Got any good ideas? mine snaped off on the 1.6 today while removing the cylinder head for a recon. its soaking in penatrating oil at the moment, was thinking about getting a sleave turned up so i can drill the bolt out and try using a stud extractor. is it safe to gently heat the alloy around the bolt a little at the same time without distorting the block? i really dont want to have to strip the block down to get it decked Share this post Link to post Share on other sites
PumaRacing 2 Posted April 9, 2006 It'll need milling out and helicoiling. You could try breaking a stud extractor in it first and then it'll need that removed by spark erosion followed by milling out and helicoiling. You could of course do what LAD did to an engine for someone I knew when they stripped the block fitting a cylinder head. Drill the whole thing out including the threads in the block, drop a longer diesel bolt in, stick a nut underneath the turret to hold that in place, say nothing and let the owner sort it out when the gasket started to blow. Share this post Link to post Share on other sites
Rob_the_Sparky 9 Posted April 9, 2006 As stated there is no easy way out. There have been people on here who have managed to drill it out with the engine in the car but it requires manufacturing a jig. Try a search, it has certainly been discussed before but it was a wihle ago. Rob Share this post Link to post Share on other sites
eddie_1.9 1 Posted April 9, 2006 It shouldn't need helicoiling if you drill it out no bigger than the tapping size for that thread. Then just run a tap down it and all will be sweet Share this post Link to post Share on other sites
Guest Darragh Posted April 11, 2006 the head bolt came out fine! i machined up a small drill jig at the machine shop at work. Drilled it first with a small pilot hole. the used a 4mm, 5mm, 6mm, and finished with a 7.5mm drill bit, evan though i needed a 9.5mm drill bit to get the tapping size the 7.5 made enough of a hole so that i could gently shock the couple of threads that were hanging out the bottom, and got the bolt out with no problems. no need for milling or helicoiling, long live the back yard mechanics!! Share this post Link to post Share on other sites
Rob_the_Sparky 9 Posted April 11, 2006 Backyard mechanics with access to a machine shop... Share this post Link to post Share on other sites
Guest Darragh Posted April 11, 2006 Backyard mechanics with access to a machine shop... he he! true! Share this post Link to post Share on other sites
simonb 0 Posted April 11, 2006 I managed to get out of this problem when I was rebuilding a ford pinto engine for my kit car. By drilling out to just below the bolts shoulder I was able to easily remove the rest of the thread. On the downside - a £100 drill was ruined in the process as it simply burned out !!!! Share this post Link to post Share on other sites
