crank pully problems

[lee celtic]

Does anybody know why the crank pully bolt would just fall out  

Mind has fell out killing my fan    

Good excuse to put a lecci one in though 8)

luckily the pully didn't come off but it has come out a bit loosing tension on the belts .

What should I do as the engine is still runnung perfect should I just pop in a new bolt and leave it or start a strip down   If I go the pop in a new bolt route is it likly to cause more problems and is there a way of wiring the bolt up tso if it works loose again it won't fly...

Ps I will wait until Top Gear is over for answers

[Sharpshooter]

If the bolt has just fallen out whole, this is not uncommon. If the thread appears to be clean, then add a couple of dobs of threadlock to it when you put it in. Then tighten it to the correct torque. Not too much though. Youll havea pig of a time when the next cambelts due. :)

[extreme90]

have you had the timing belt replaced recently ?
if so then the person who did it more than likely didnt locktight the bolt back into place

if it hasnt been done, then, while the biggest part of the job to do ( getting the bolt and pully off) is all apart, id use that as a excuse to fit a new belt    
also to check to see if it hasnt damaged the woodruf key that drives the aux belts ( crank pully) and also plays a part in timing the engine aswel

when the bolt is refitted, tighten it fully then undo it again, locktight the thread liberally then procede to tighten upto the FT torque setting  :P

dan

[treeman]

loctite threadlocker all the way mate, i had worn threads on the engine mount on my corsa, the bolts kept workin loose an my engine was tryin to meet the tarmac whilst i was driving until i used that stuff, brilliant :-)

[johnpirate]

Sometimes its the damper on the back of the pulley thats cracked and that causes the pully nut to vibrate loose.There are two woodruff keys in the front of the crank mine came out and got damaged .I was lucky and tapped a new one into place .I used it as a chance to change the timing belt.The nut had to be tightened to 333 to 350 Nm which requires a special torque wrench.I borrowed one stood on the wing and pulled .The pain that shot up my arm and down my chest I thought I was having a heart attack.I managed about 300Nm and with loctite its been ok for over three years.

[crazymac]

After I had a woodruff key break on me, I did my belts etc and used a LARGE bar to get the bolt tightened, Then took the welder to three of the flats, NOT COMING UNDONE NOW!!!!!!! and as the engine already has 207000 on the clock I'm not overly worried about having to replace the belt again.

[lee celtic]

Well I am taking the advice and I have ordered all the stuff I need to change the timing belt and crasy mac the welder bit sounds like a very good idea

The parts are coming in tomorrow so I will be vedging the rest of today :D before the work starts..

[Range Rover Blues]

I'm sure with a bit of ingenuity you could drill the head of the bolt then wire it to a hole in the pulley.

[lee celtic]

Well it's all done  :D  :D

New Timing belt and pullies all back on .

Went out for the first run today and all is well again in the land of landy 8)

Thanks all for the advice in the end I used lock66 thread lock as it has upto .3 mm fill and is super strong hold (we use it at work for falll arrest blocks) and acording to haynes I am now a four Spanner mac'a'nic. :D