Originally posted by XR_Strider_GuY
Failing changing the lifters, i would hazzard a guess in the timing chain tensioner filter and/or timing chain/guide itself.
I initially thought this, even hoped it was this but the sound is definately coming from the rear (firewall) end of the engine.
Originally posted by Venom XR
If the noise increases/decreases with acceleration/decceleration, is could be the purge valve.
The carbon canister purge valve? It is definately related to the engine revs since it speeds up and slows down as you rev it in say park. It does become louder when you rev it, but I think thats just because there's alot more ticking going on.
I've had a few thoughts about what might have happened to the lifter (if that is my problem).
- First thought is that the lifter depressed and is stuck like that, creating a gap between the rocker arm and the valve stem.
- Second thought is that the oil track to that lifter/rocker has become blocked by some debris preventing oil from reaching it.
- Third thought is that the lifter has shat itself into a few hundred peices... :hrm:
I cant help but think though every minute I drive it like this is causing more damage and I'm yet to make the 100km pilgrimage home. I for one can't wait to hear *tick, tick, tick, tick...* for an hour or so up the freeway. :dead: