scooby87

iTrader: (5)

The useless allen head bolts on the cam pulleys are shot, one has rounded after a hour of wrenching and the second I cant budge but will probably round once its had the same amount of abuse.

Would a impact wrench with allen attachment work on these?

How have others got them out I cant weld so I can see the rounded one is really going to cause problems.

Also I am locking the cams using a spanner on the cams themselves as I had already taken off the cam belt... oops This method was fine for drivers side head but the other side is sooo much tighter

merlin24

iTrader: (1)

Drill them out - nice sharp 4mm drill bit and cutting oil to start with, drill to just below the depth of the head of the bolt and then go through with a 10mm drill bit.
This will release the tension on the bolt and will come out with a allen key.

Mick

wms-racing

I grind the blooming things off, I find it's quicker and time is money ;-) had 2 yesterday, even broke a head a few weeks back!

scooby87

iTrader: (5)

Cheers for the advice guys, my concern with drilling or cutting them off is whether I would get the rest of the bolt out after without damaging the thread in the head...

Haa I would however love to just grind the dam things off and replace with the 17mm version, hate wasting my time with annoying things like this.

merlin24

iTrader: (1)

Once the head of the bolt has been drilled through to release the clamping force of it on the pulley, you can undo it by hand.

Mick

scooby87

iTrader: (5)

Cheers Mick, I found this out this morning when I gave in and just drilled it. Will be buying 4 of the 17mm version I think.

For anyone else trying this, I also bought a allen attachment so I could use my impact gun.. This failed miserably

AS Performance

iTrader: (4)

have always used our own fabricated version of the Subaru pulley locking tool an never had any issues since (touching wood )

allows a far better "grip" than any other method and is also invaluable for the later "hollow" cammed cars

wms-racing

Don't use them, they are alot shorter, you would only get a few threads in.

scooby87

iTrader: (5)

Don't suppose you want to mention what you made your special tool from haha?

Ohh really, I had better get some more allen ones then and hope I don't need to take them off again any time soon.