Toby -

Interesting observation. I don't remember from my tear-down if the crank nose was a taper or a straight cut leaving a shoulder for the timing sprocket to butt against. Are you saying it chewed into a shoulder on the crank or spread up and over a taper?

Either way though the recession result could be from the timing sproket spinning on the crank after the key broke, couldn't it?

Frank

on the 4 cranks I looked at,
the 'nose' that the pulley butts into is a radiused edge, and only about 3/32" of metal actually connects- AFTER the pully's smushed into conformance with the (much harder) crank.

Which reminds me- I should go retorque mine soon, eh?

t

I just had mine off for the timing belt job. No way to torque it properly and it's the old one too. I really need to order the new one.

Anyway, it's on there about this tight;
Btbtbtbt, btbtb, btbtb, btbtbtbtbtbbtbtbtbttbtbtbtb.

Hope it holds.

Clay

Maybe we need to add "crank bolt torque check" to the list of yearly routine maintenance. <img src="/forums/images/graemlins/smile.gif" alt="" />

Geez, more like daily for me. <img src="/forums/images/graemlins/scared.gif" alt="" />

How much is that bolt?

Clay

That's probably not a bad idea at all, but I haven't heard of anyone on this forum that has experienced a problem after replacing the old bolt with the new one, have you? Does that mean that:
1) the new bolt is superior?
2) we're more accurate than the factory was?
3) it takes 10-15 years for the dang thing to blow up?

Beats the Hell outta me, Lieutenant.

Frank

'Bout 5 bucks and a whole lotta work - but not as much as if it breaks. <img src="/forums/images/graemlins/wink.gif" alt="" />

Frank

I've said it before, and I'll say it again - this is a $5 15min fix. It is well worth your time and money.

How many people have re-checked the torque on their crankshaft bolt through the years? However, remind me and I'll re-check mine in Aug to see if it's gone funny. <img src="/forums/images/graemlins/wink.gif" alt="" />

It takes far less than 15yrs for this thing to creep up. As stated, usually happens within a short period after a timing belt change. Only seems to take one episode of old crank bolt "tampering" to bring down the beast. <img src="/forums/images/graemlins/frown.gif" alt="" />

I'm still not clear as to the part number. I'll order it tomorrow if I can get the fer-sure right part number.

Clay

I don't remember if I have two spanner holes in my pulley or not. I think I'll check and if I do I'll get a spanner to fit and put that job on the maintenance list. Good suggestion.

Frank