Valve clearances slightly tight on exhaust valves?

[JB21]

Checked the valve clearances on my 2ZZ tonight and the results below.


Intake range - 0.08-0.18mm


Results - 0.13 - 0.13 - 0.10 - 0.10


Exhaust range - 0.22-0.32mm


Results - 0.16 - 0.20 - 0.25 - 0.25


So should I re-shim the 2 out of spec exhaust valves or just leave them be?

[Ardent]

If the 2zz is the same principle as the 1zz. It is not s shim design.
Cannot reshim. Have to change the bucket

[Carolyn]

Checked the valve clearances on my 2ZZ tonight and the results below.


Intake range - 0.08-0.18mm


Results - 0.13 - 0.13 - 0.10 - 0.10


Exhaust range - 0.22-0.32mm


Results - 0.16 - 0.20 - 0.25 - 0.25


So should I re-shim the 2 out of spec exhaust valves or just leave them be?

I'd re-shim them.  Exhaust valves get hot.  If they are too tight they won't seal when the engine warms up.

[thetyrant]

As above reshim the tolerance is there for a reason, too tight on exhaust is not where you want to risk it.

[JB21]

Thanks for the replies. I'll pull the 2 exhaust shims that are out of spec, measure them with a micrometer and use one of the shims from the blown engine.

[Call the midlife!]

Thanks for the replies. I'll pull the 2 exhaust shims that are out of spec, measure them with a micrometer and use one of the shims from the blown engine.

Might be worth measuring all your available shims and seeing if you can swap any around to improve your measurements across the lot.