Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[ScottieMV6]

As above. Putting crank pulley back on after changing cam belt, went to torque it up (65NM I think this is correct) and snapped one. Same in the water pump pulley!!!!!

Assume I can't get away with 5 in the crank rather than 6? Will I be able to drill it out and re tap?

[ngrainqey]

if there's a stub sticking out on the crankshaft then you could possibly get some mole grips after taking the pulley off (depends how tight it is in the actual hole-might beable to get it out if it just tightens against the pulley)

tbh the crank pulley bolts i just do up very tight by hand without a torque wrench and have been fine without any sheered bolts or loose ones

[Marks DTM Calib]

To tight....crank pulley bolts are 20Nm!

The water pump bolts are 8 with a dab of locktite!

[vauxfan2k]

I never torque the pulley bolts either, just as tight as possible by hand. same goes for the water pump ones but with loctite, if you havent already I would be more concerned about gettin the water pump one out first.

dont like the chances of fitting a drill in there to drill them out tho..

[ScottieMV6]

Oh dear (putting it politely)!!!

I only did the water pump ones to 8 and still managed to snap one!

There is no stub sticking out on the crank so only thing I can think of is to drill it and re tap? Or will the metal be too hard to tap?

Think the water pump might be slightly easier as there is a bit sticking out of the back.

[ScottieMV6]

All in all its been a pretty disastrous first attempt at any serious work on the miggy.

Still got the cam cover gaskets and a service to do yet.

Its not put me off though. We learn from our mistakes.

[TheBoy]

As said above, they are only 20Nm, which isn't that tight (certainly not 'do them up as tight as you can' )

[Marks DTM Calib]

You shoudl be able to use a little chisel or flat blade screwdriver to tap the crank bolt remains in an anti clockwise direction to get it out

[Darth Loo-knee]

Oh dear (putting it politely)!!!

I only did the water pump ones to 8 and still managed to snap one!

There is no stub sticking out on the crank so only thing I can think of is to drill it and re tap? Or will the metal be too hard to tap?

Think the water pump might be slightly easier as there is a bit sticking out of the back.

Scot 8nm aint much above finger tight mate  

[feeutfo]

when i did my cam belt one of crank pulley bolts was already sheared. Vx service history. I took a scriber and gently "stabbed" the bolt/stud to one side of centre, move the scriber in an anti clockwise direction, like your stiring a cup of tea if you know what i mean, and it just undid. Wound it straight  out no problem at all. But depends how clean the thread is i guess. Hth

[dbug]

These bolts are only small diameter (take a 10mm AF spanner if I remember right) and suprised you only sheared one tightening to 65Nm!!  However I should chuck your crank pulley bolts and replace with new as they will have been "stretched" by such a high torque and could well shear as a result in the future - a flying crank pulley will do a lot of damage.  Tighten to the correct torque - 20Nm - or tighten by hand using a suitable ring spanner!

[ScottieMV6]

Just been to Vx and new crank pulley bolts and water pump bolts are £2.73 retail inc VAT so ordered them.

Better to be safe than sorry!!!