Ok, im stumped on this one.
Got a squeek (exactly like a big loud mouse) coming from the engine. Definately in the head if my trusty piece of rubber hose being used as a stethoscope is reliable.

Every 4 seconds when idling. Bloody weird.
Took head off, nothing. Driving me crazy now.
Any ideas ?
Street cred is down the drain if i have to pay someone else to fix this.