L200 Owners Club

The Forum => Public/Initial Posting Area. => Topic started by: chris longstaff on 03 November, 2020, 20:46:10 PM



Title: L200 k74 crank pulley bolt snapped
Post by: chris longstaff on 03 November, 2020, 20:46:10 PM
Hello just wondered if anyone has successfully drilled out a snapped crank pulley bolt from a k74 l200.Thankyou


Title: Re: L200 k74 crank pulley bolt snapped
Post by: rodeast24 on 04 November, 2020, 13:04:11 PM
get a right handle drill, and a good set of drills, centre punch, the art here is to centre punch the bolt in the centre, once thats done start small with a quarter " drill and work your way up. you can try easy outers to see if it brakes the bolt and screws out, if not just keep going up in sizes till it comes,,, if you are not lucky and you damage the thread dont worry you can drill it over size and insert a helicoil.. get a two foot bit of wood to put on the back of the drill and wedge it to force the dill in,, as always be slow and take your time..


Title: Re: L200 k74 crank pulley bolt snapped
Post by: chris longstaff on 04 November, 2020, 20:14:05 PM
Thankyou for your help will try it at the weekend!


Title: Re: L200 k74 crank pulley bolt snapped
Post by: Supersnail on 05 November, 2020, 15:39:54 PM
Try not to snao the drill in the hole as they realy are difficult to redrill out. As Chris says take it slow.


Title: Re: L200 k74 crank pulley bolt snapped
Post by: chris longstaff on 14 November, 2020, 22:34:04 PM
Hello managed to get the snapped bolt out the crankshaft trucks all running nicely again Thankyou for everyone?s help.Does any no why these bolts snap seems quite a common fault on the k74 l200.Thankyou


Title: Re: L200 k74 crank pulley bolt snapped
Post by: rodeast24 on 16 November, 2020, 15:56:11 PM
Well done Chris,, not really a nice job and it frazzles the nerves somewhat. I think its just poor quality bolt material that mitz used,, I usually put a flame on the bold to heat it before undoing, and a little shock treatment with a hammer usually does it..Hope you put a new pulley on it they have a habit of delaminating 


Title: Re: L200 k74 crank pulley bolt snapped
Post by: barnstormer on 16 November, 2020, 21:27:41 PM
Well done Chris,, not really a nice job and it frazzles the nerves somewhat. I think its just poor quality bolt material that mitz used,, I usually put a flame on the bold to heat it before undoing, and a little shock treatment with a hammer usually does it..Hope you put a new pulley on it they have a habit of delaminating 

More likely to be pattern bolts - I bought a new bolt when I did the belts and bottom pulley on mine The thread on the new milners bolt was about 4 thou undersize across the thread and a quick and dirty hardness test with an automatic centre punch showed that it was softer than the original, so the original one went back in.


Title: Re: L200 k74 crank pulley bolt snapped
Post by: chris longstaff on 16 November, 2020, 21:50:30 PM
Yeah thought it must be just poor quality bolt.Hope this one will be ok.I put a new bolt, wood ruff key, bottom pulley, timing belts and idler pulleys all from ks international  and torqued bottom pulley bolt to 186nm!


Title: Re: L200 k74 crank pulley bolt snapped
Post by: rodeast24 on 17 November, 2020, 11:41:54 AM
When I do anything on my own stuff I always get genuine parts, even filters, my reasoning is simple, it costs a little more but I have more confidence in the parts, pattern parts are made cheaply normally from inferior material. Hence are cheap, and wont last the distance. some times this does not work out as more OEM's are sourcing there parts from third party suppler's I have noticed this. if I do a job on a customer car they get two prices and not so much of a warrantee on pattern parts, but you would be surprised at the cost of main dealer parts these days sometime I get them cheaper than motor factor pattern parts,,


Title: Re: L200 k74 crank pulley bolt snapped
Post by: rodeast24 on 17 November, 2020, 11:53:05 AM
I remember doing a full service on a discovery TD5 some years ago,, within hours it had broken down,, a lot of head scratching diagnostics and time was spent on why this bloody thing had broken down, A trip over to my mate who works for Land Rover told him what I had done to it, he starts laughing and told me to replace the diesel filter,, I said what for its new. so returned back a little confused,, low and behold took the filter back off and it had collapsed in side,,, dear I say it pattern filter.. Never again.