valves/cyclinder head long term reports

[regal]

When I bought my Yaris it was for a long term vehicle (hoping 20+ years). The one weakness I identified was the cylinder head design. I was very surprised with the shimmed mechanical valves. Adjusting valves on this car is almost out of the question for a DIYer unless you invest in a bunch of shims.

My car is at 30K, I notice a little ticking. But I am wondering if anyone has had a valve wear out of adjustment and what milage it takes for that to occur? Just looking for feild reports/discussion.

[auxmike]

Yeah, most cars get hydraulic valves these days!

[Happy Little Pony]

Originally Posted by regal

When I bought my Yaris it was for a long term vehicle (hoping 20+ years). The one weakness I identified was the cylinder head design. I was very surprised with the shimmed mechanical valves. Adjusting valves on this car is almost out of the question for a DIYer unless you invest in a bunch of shims.

My car is at 30K, I notice a little ticking. But I am wondering if anyone has had a valve wear out of adjustment and what milage it takes for that to occur? Just looking for feild reports/discussion.

They've been making this engine for about a decade now. If there were serious problems we'd probably have heard about them by now. From what I have heard, the valve lash is something you CHECK at about 100,000 miles and it may or may not need adjustment.

In any case, I was always under the impression that some ticking was good. No ticking means your valves have stretched and are now too long.

[schume]

I've wondered about the valves. Mine seems pretty noisy, but I don't have anything to compare it to. I guess I need to visit a few Yaris owners and listen to their engines idle.