hi peeps cant undo the allen bolts holding the w/pump in my twinny engine anybody know any tricks or ways of removing them don,t want to drill them if I can avoid it? the only good thing is the engine is out of the car.
If the engine is out of the car can't you get some leaverage using a weight bar or something similar? I had to remove a stuck lambda out of my other halfs astra and ended up using a 5ft bar (hollow) over a wrench to unscrew it - It was so stuck a 1ft bar wouldn't budge it.
What are you using to undo them? Most Allen keys are a bit prone to twisting, leading to the possibility of rounding. A good quality inhex socket should handle the job...and also gives you the opportunity to use some percussive force to shock the bolts. I've never had a problem with these bolts - maybe someone has been a bit rough with them in the past.
Yes been using a 1/4" drive socket and bit with a small bar on it for leveridge even tapped the bit in just to get good fit but they just wont budge think they maybe locktited in thanks will try again maybe with the suggested tool failing this is it a good idea to dill them carefully?
Some folks have hammered in an oversized torx bit when allen socket head screws have rounded. I would think that drilling should be your very last resort because of the risk of damaging the threads in the block.
Whenever I've had problems with these type of screws it's usually because I've been using cheap tools and haven't had the leverage, so either the tool distorts or it slips out; either way the screw gets rounded. Using good quality allen bits on a decent 3/8" or 1/2" ratchet should sort it out.
cheers I will have to get a set of 3/8 or 1/2 bits at the weekend I did think drilling would not be a good idea just not sure what else to do may have to be the torx option gave up before I ruined them I think
Yes torx bit, that's what I use. Also, old fitters trick, if you can get to it, give the head of the bolt a whack/tap with a hammer that will help to loosen it, but be careful not to damage anything you don't want to.
Not sure about that one myself but can't try because the engine is in my store cupboard at the mo Its just big enough to do a belt change but not for a blowtorch to many bits ? Oil,brake fluid paint and such
Heat will help. If all else fails I usually put a blow torch on it for a while, then spray some WD40 on it, then the blow torch again followed by the WD40. I think the heat and cooling helps to free it but not sure on the exact science. In an ideal world you would heat the nut to get it to expand, but in this case the engine is the nut so that wont work. so if you heat the bolt, it will expand over its length a little helping to release the tension from the back of the head...........I think!! Good luck!
Hooray got them out. Bit of brut force must have been to tiered needed some energy. Oh yeah and a bigger bar No wonder had probs getting them out they were packed out with loads of PTFE tape wonder they got them in Used a pair of mole grips just to crack them then a bar on the ratchet Cheers for your tips peeps