Valve clearances slightly tight on exhaust valves?

[JB21]

Checked the valve clearances on my Toyota 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?

 

[White16valver]

Is that clearance between the piston faces and the valves??

If so, 0.16mm is not a large amount of space in reserve... lol (Is there such a thing as 'valve bounce' at high revs??)

(But then 0.08mm seems ridiculously tight!!)

 

[JB21]

Is that clearance between the piston faces and the valves??

If so, 0.16mm is not a large amount of space in reserve... lol (Is there such a thing as 'valve bounce' at high revs??)

(But then 0.08mm seems ridiculously tight!!)

You measure the clearance between the smaller, low/medium speed cam lobe and needle roller on the rocker on the 2zz.

 

[JamesBryan]

I'd redo the shims, especially the 0.16 one.

 

[NorthloopCup]

It’s very unusual for a clearance to get tighter on a used engine. I’d be re-shimming it for definite.

 

[JB21]

It’s very unusual for a clearance to get tighter on a used engine. I’d be re-shimming it for definite.

I've changed the cams, rockers etc from a lower mileage head. I'll re-shim the 2 out of spec exhaust valves then.

 

[NorthloopCup]

I've changed the cams, rockers etc from a lower mileage head. I'll re-shim the 2 out of spec exhaust valves then.

Ah ok, I see!