jza800 Posted February 15, 2015 Share Posted February 15, 2015 the worst is almost happened to me, have an engine which has broken one off the bolts on the crankshaft to the flywheel, can i Mount the flywheel without that one bolt, because there are 7 other bolts???? Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted February 15, 2015 Share Posted February 15, 2015 No, no, no, no, no! Take the crankshaft to a machine shop, and have it drilled and tapped out. Quote Link to comment Share on other sites More sharing options...
berg Posted February 15, 2015 Share Posted February 15, 2015 I wouldnt run it without if it were me Not sure if it would cause any problems with balancing with only 1 missing but its a risk not worth taking, after all theres 8 for a reason Quote Link to comment Share on other sites More sharing options...
Lee P Posted February 15, 2015 Share Posted February 15, 2015 the worst is almost happened to me, have an engine which has broken one off the bolts on the crankshaft to the flywheel, can i Mount the flywheel without that one bolt, because there are 7 other bolts???? Was this doing it up and if so what bolts and flywheel are you using. If stock don't worry but if not, Make sure they havnt bottomed out on the block. Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 i think previously owner used the stock bolts twis, it is stock flywheel and clutch.. the car is bpu to max 500 hp.. Quote Link to comment Share on other sites More sharing options...
HadeS Posted February 15, 2015 Share Posted February 15, 2015 Place nut on the top of the broken bolt and weld it inside. Take the spanner and undo the nut with bolt. Job done! Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted February 15, 2015 Share Posted February 15, 2015 Place nut on the top of the broken bolt and weld it inside. Take the spanner and undo the nut with bolt. Job done! That's probably what I would try first. The thing that would worry me, is if it had an effect on balance - as mentioned above. Any crank vibrations at what could be 7k rpm plus, could be very nasty Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 i am not that Lucky.. can that be welded out with a nut???? Quote Link to comment Share on other sites More sharing options...
Fizzy T Posted February 15, 2015 Share Posted February 15, 2015 I highly doubt it, that's a job for a machine shop. Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 damm.. hope they can do that with the crankshaft in the engine.. Quote Link to comment Share on other sites More sharing options...
Benjy Posted February 15, 2015 Share Posted February 15, 2015 Wtaf has happened to that!???! Quote Link to comment Share on other sites More sharing options...
Wez Posted February 15, 2015 Share Posted February 15, 2015 Wtaf has happened to that!???! My thoughts exactly Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 previously owner have tried to get i out, and then came to me for help.. and it stuck, so therefore I must send the work on to a workshop .. but is it possible to do this without taking the crankshaft out, as it seems in my eyes to be posible to do without taking it off Quote Link to comment Share on other sites More sharing options...
berg Posted February 15, 2015 Share Posted February 15, 2015 Looks like a failed attempt at removing already? - - - Updated - - - ^ Beat me too it Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 yes you a right, but is it a easy fix for the workshop or??? Quote Link to comment Share on other sites More sharing options...
Krister Posted February 15, 2015 Share Posted February 15, 2015 (edited) Have you tried drilling it and use a tap to get it out? Dont know what it's called, but like this: http://www.atoy.fi/kuva-data/119-014300011.jpg It's just me, but if you cant get it out without pulling the crank, I'd just leave it out. The bolt is so near the middle of the crank and in the end, I doubt it will cause any severe unbalance and after all it's only the end of the nut that is missing, which what, 5-10grams in a 15kg crank. Edited February 15, 2015 by Krister (see edit history) Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 15, 2015 Author Share Posted February 15, 2015 (edited) I have tried with that, with no luck, so the last i tried was with a torx, but as you can see the broke too so i think the last solution is to drill it out, and remake the thread in the crank Again.. i really dont hope they will have the crank out for the small a Work.. i think if they are a little carefull they can do it without getting metal shavings in the engine.. I had the same thought that 7 bolts would be ok, unless I could get the drill out and put 8 new in, have allready 8 nye bolts. Edited February 15, 2015 by jza800 (see edit history) Quote Link to comment Share on other sites More sharing options...
Krister Posted February 15, 2015 Share Posted February 15, 2015 I think it's doable as there's plenty of room when the gearbox is out. Worst case is that you will have to helicoil it. Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 15, 2015 Share Posted February 15, 2015 If your doing this by hand the first thing i'd do is make a ring to bolt to the end of the crank, say 10 mm thick Drill 5 holes in it using the same PCD that's in the crank, use 4 of them to bolt the ring to the crank, you use the 5th as a guide hole to keep you centralised over the hole with the broken bolt in it I'd make a drill bush to go in the 5th hole and make it 20 mm long which will keep the drill online and square with the hole. Find out the tapping drill size of the holes in the crank and drill out using a slightly smaller diameter drill Excuse my dodgy sketch but this is what i'd make easily in 30 mins and should let you get the bolt out with no damage to the thread Quote Link to comment Share on other sites More sharing options...
Digsy Posted February 15, 2015 Share Posted February 15, 2015 Don't assume that it will be OK with 7 bolts. Chances are if 7 bolts were OK Toyota would have designed it with only 7. OEMs tend not to add components for the sake of it. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 15, 2015 Share Posted February 15, 2015 Well thats a mess! Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 15, 2015 Share Posted February 15, 2015 Well thats a mess! Not really, easily sorted with the right tools Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted February 16, 2015 Share Posted February 16, 2015 What will he need to drill tool-hard material though? I'm assuming a torx bit is considerably harder than the crankshaft material. Carbide drill bit? Quote Link to comment Share on other sites More sharing options...
jza800 Posted February 16, 2015 Author Share Posted February 16, 2015 If your doing this by hand the first thing i'd do is make a ring to bolt to the end of the crank, say 10 mm thick Drill 5 holes in it using the same PCD that's in the crank, use 4 of them to bolt the ring to the crank, you use the 5th as a guide hole to keep you centralised over the hole with the broken bolt in it I'd make a drill bush to go in the 5th hole and make it 20 mm long which will keep the drill online and square with the hole. Find out the tapping drill size of the holes in the crank and drill out using a slightly smaller diameter drill Excuse my dodgy sketch but this is what i'd make easily in 30 mins and should let you get the bolt out with no damage to the thread That is alright, but will let the machine shop to the rest as they probely have the more right Tool than i have, but is it a easy fix for the machineshop?? and can they do it with the crank in the engine, as i dont feel like taking it out, as thet will result in new bearings Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 16, 2015 Share Posted February 16, 2015 What will he need to drill tool-hard material though? I'm assuming a torx bit is considerably harder than the crankshaft material. Carbide drill bit? Yes a carbide drill bit will be required if there's broken off torx bits etc in the bolt. Quote Link to comment Share on other sites More sharing options...
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