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="" />