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| Broken bolts...tappet cover https://auszookers.com/forum/viewtopic.php?f=5&t=10818 |
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| Author: | Cozook [ Thu Apr 01, 2010 11:42 pm ] |
| Post subject: | Broken bolts...tappet cover |
 just snapped two of four............
gasket was leaking hard on way up north so i nipped em up a bit. got new gasket but broke two bolts on front of cover. got spares.... can I just drill brokens out carefully or will need special tool? Funds are tight....tighter than a fishs asshole at 50,000 fathoms. Cheers blokes |
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| Author: | Scrawny [ Thu Apr 01, 2010 11:55 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Did the bolts break from overtightening or were they siezed? If they're not siezed then they should come out easily |
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| Author: | mrw82 [ Fri Apr 02, 2010 12:02 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
where did it snap? with the cover off is there enough of the bolt to get vise grips on to undo it? or try using a centre punch and hit the end of the bolt in the direction to undo it. you will probably find that now the head of the bolt is off the bolt is no longer tight. (unless it was pulling up tight on the shank or bottoming in the hole (unlikely for that bolt)). it that doesn't work use an easyout to remove it. If you try drilling out the bolt to retap the thread you will very likely fail. the bolt is steel (possibly high tensile) and metal around the bolt is alloy (much softer then steel), if the drill is slightly off centre or it wanders then as soon as it touches the alloy it will want to drill the alloy and run off and be fucked. |
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| Author: | 31zook [ Fri Apr 02, 2010 12:04 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
if they snapped due to over tightening just get a screw driver and tap a grove into them and spin them out, or grab a easy-out, about $13 at repco, you will need to drill holes in them anyway with an easy-out. The easy-out will be the bast bet for a seized bolt 
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| Author: | Cozook [ Fri Apr 02, 2010 12:16 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
Thanks heaps guys....they snapped due to overtightening..... wasn't until I went to take them out that I broke em. they snapped off at the bottom so some left in screw holes in the head. I'll go the screwy then the easyout first thing in the morn. Thanks a million. |
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| Author: | Joe [ Fri Apr 02, 2010 12:41 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
I'm pretty sure they are high tensile bolts if so easyouts wont work.... A few years ago i snapped a bolt for the thermostat housing we ended up having to drill around the snapped bolt in the manifold to get the left over bolt out then filled the hole with steel putty then after it set we tapped a new thread into that then screwed a stud into the manifold then used a nut on top...... |
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| Author: | mrw82 [ Fri Apr 02, 2010 1:26 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
you can drill high tensile easy enough. with standard HSS drill bits. and if you can drill it you can put an easy out in it. |
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| Author: | Red_October [ Fri Apr 02, 2010 6:40 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
For the record I may or may not have done this exact same thing and an easy out did nothing. I ended up calling Capital Thread Repair (ACT) and he drilled them out, resleaved the holes and then retapped to the correct thread. Cost me $50. Also, check the two bolts that haven't snapped. I dare say you've stretched them and will need 4 new bolts. |
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| Author: | Fluffy [ Fri Apr 02, 2010 11:28 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
drilling HT bolts is easy enuf .. just don't heat them up.. once you do that your screwed - use some sort of coolant. if you can grind off the uneaven snapped bit /make it flat and make a decent indent in the center of the screw you will inprove your chances 10000000000000 fold |
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| Author: | BlueSuzy [ Fri Apr 02, 2010 12:03 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Joseph your dreaming. 
The rocker cover bolts won't be hi tensile otherwise they wouldn't of snapped. They are just to keep a rubber seal, sealed. Not to bolt the whole head together... Try centre punch/screwdriver/vicegrips. Don't damage the outer diameter/thread/hole of the broken stud. That will make it worse. Best bet is LeftHand drill bit. (yes they exist though harder to find, possibly more exxy)And then easy out. Next will be normal drill bit an then easy out. Problem is, with normal drills, they will drill the broken stud further into the hole, making it possibly harder to remove if deep. Make sure your drilling the stud in the centre. Offset may cause you more drama's. Also, make sure you drill the hole correct for the easy out, too big and the easyout may not grab the stud but bottom out in the head! Easyouts/drills are harder then High tensile. Cheap shit brands maybe soft. I do this for a Trade. So im not talking shit. |
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| Author: | Fluffy [ Fri Apr 02, 2010 12:06 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
there is a trade in removing broken bolts? 
left hand drils at some auto shops retail bout 80$ a set |
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| Author: | BlueSuzy [ Fri Apr 02, 2010 12:12 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Yes its called a Maintenance Fitter. They f#&k the machine, You fix it. |
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| Author: | Fluffy [ Fri Apr 02, 2010 12:15 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
lol they try and fix it first then butcher it then come to you! lol im hearin ya |
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| Author: | BlueSuzy [ Fri Apr 02, 2010 12:18 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Yes!
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| Author: | ball [ Fri Apr 02, 2010 12:49 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Fluffy wrote: lol they try and fix it first then butcher it then come to you! lol im hearin ya
I used to get this quite a lot. Once you start telling people it cost 2 or 3 times as much to get it out once they butcher it themselves, they learn to just bring it in unmolested.
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| Author: | want33s [ Fri Apr 02, 2010 1:00 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
Another way I've had to use a few times is weld another bolt to the broken bit. Because it's in alloy you'll only get weld on the bolt. |
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| Author: | Fluffy [ Fri Apr 02, 2010 1:02 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
put a nut on top and weld down through the threads maybe |
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| Author: | BlueSuzy [ Fri Apr 02, 2010 1:19 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
want33s wrote: Another way I've had to use a few times is weld another bolt to the broken bit. Because it's in alloy you'll only get weld on the bolt.
Yes, also a good trick, and the heat helps sometimes also if Loctited/seized. Those cam cover bolts are very small though. Id be scared, weld can stick to alloy! or blow it away
I think its copper or brass or something that it won't stick to. Even if you straight weld onto it. |
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| Author: | mightymouse [ Fri Apr 02, 2010 2:35 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
| Strap on have left handed bits individually I have no idea of price, have used them on race car manifolds often, usually after someone has been a little too heav handed.
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| Author: | Joe [ Fri Apr 02, 2010 2:55 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
BlueSuzy wrote: Joseph your dreaming.
 it happens a bit im use to it now 
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| Author: | MacDaddy [ Fri Apr 02, 2010 6:01 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
joseph wrote: BlueSuzy wrote: Joseph your dreaming. it happens a bit im use to it now Your probably still recovering from your accident... Bad concusion can take up to a year to get over... 
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| Author: | Cozook [ Fri Apr 02, 2010 6:59 pm ] |
| Post subject: | Re: Broken bolts...tappet cover |
All good thanks guys.........my x skipper 85yo german boilermaker is just gunna look at em on saturday..... He's x hitler youth so the bolts will just get up and walk out .... Hardest tuffest bloke I know and he's 85 with one leg....... Should b sweet the guy's an eggspurt........thanks again fellow zookians. cory |
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| Author: | Cozook [ Fri Apr 09, 2010 2:54 am ] |
| Post subject: | Re: Broken bolts...tappet cover |
Should of told ya's..............Easy out fixed em.......easy! Thanks for everyones help...... Ended up being a 5 dollar repair.............payed for bolts,borrowed easy outs. Fark I LUV me zook!!!!!!!!!!!! |
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