Founds this on a thread over at Tundra Solutions forum that sums it up:
Quote:
The way the book says to check the valve lash is to do audible inspection by listening for excessive valve train noise and then check for an uneven idle.
If the lash is excessive there will be a ticking noise that you can hear. If the lash is to tight the valves will not close all the way and you will loose compression and that will present as an uneven idle. If either of these conditions exists you then must physically check the valve lash with a feeler gauge.
The FSM will give you the minimum and maximum lash for each valve. You properly position the cam and then check the lash with a feeler gauge and keep careful notes of what valves if any are out of spec.
Once you have checked them all the next step is to remove the shims from the followers that are out of spec. This is done using the Toyota Special Service Tools (SST). Once the shim is out, use a micrometer to measure its thickness. Then look up the thickness of that shim and the lash up in the chart in the FSM and it will tell you what size shim to replace it with to achieve the proper lash. Normally each shim will usually need to be ordered. The downside here is that you will need to reinstall the out of spec shim before rotating the cam to the proper position to remove the next shim. You must never let the cam lobe touch the follower without the shim in place.
Once you get all the out of spec shims out and measured and you have the new ones ready in install just remove the out of spec ones and reinstall the new ones. Simple, right??
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Tundra Forum Thread
So the audible IS the 1st step. If anything sounds lick clicking, or there is rough idea, do the inspection! I wonder what my stealer would say?
Bascially guys on the Tundra forum were saying you could easily go 2 - 3 times that long without more than 1 or 2 of the valves being out of adjustment - maybe this will be a 90k check (visual that is) along with the timing belt perhaps?
I haven't seen firm prices on this, but looks to be at least a $350 service (unless it can be done audibly as noted by some dealers above).
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