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Old 06-18-2013, 10:56 PM   #1
storm-chaser
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Default Camshaft installation EJ25D - intake and exhaust valve specs?

Anyone know what the specs should be for intake and exhaust valve clearance?

I flipped the valve shims to get new life and a new surface for the cams.

And I torqued the inner journals to 7.0ft-lb and the outer journals to 6fl-lb.

I set the oil seals in place by hand and made sure they were seated correctly before torqueing down the outer journal. Used rtv in the spots mentioned in the manual.

I'm in the middle of a head gasket change
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Old 06-19-2013, 11:19 AM   #2
Patrick Olsen
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Intake is 0.2mm, exhaust is 0.25mm. I can't remember what the +/- tolerance is - maybe 0.025mm?
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Old 06-19-2013, 10:07 PM   #3
storm-chaser
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So I went ahead and got a new feeler gauge today so I could get this done.

I think I screwed up some of the buckets/shims and did not put them back on the same valve spring from which they where removed, on the pass side cylinder head. I measured everything and here is where I'm at (please advise if this is okay) The drivers side is fine, no mix ups.

Remember shims have been flipped for new life, new surface.
PASS SIDE: (if looking down, if cylinder head was flat on ground) in MM
EX IN
.23 .18
.20 .17

.23 .18
.18 .13


DRIVERS SIDE SHIM CLEARENCE in MM:
EX IN
.23 .17
.23 .203

.25 .203
.23 .203


Above is my current specs, hope this is readable! lol.

Are these numbers okay, I already torqued the cams on the pass side, but I can remove them and shuffle a few shims around if some of those are below spec (like the # 1 cylinder intake shim, only .13 of an inch gap)

Thanks!

Last edited by storm-chaser; 06-20-2013 at 02:03 PM.
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Old 06-20-2013, 10:11 AM   #4
Patrick Olsen
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(1) I don't understand what the numbers are - what is "CYL #" and what is "SPEC"?

(2) Are those numbers inches or millimeters? The lash specs in inches are only 0.0079" (+/- some amount) for the intake and 0.0098" (+/- some amount) for the exhaust. Your last sentence says the gap is "only 0.13 of an inch", but that's a few orders of magnitude bigger than it should be.
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Old 06-20-2013, 02:24 PM   #5
storm-chaser
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Edited with better chart now, you should be able to read it.
The original post didn't keep my formatting, but it was supposed to follow each cylinder # with each spec listing. But that's all removed so you can see what it looks like with just the numbers. EX= Exhaust camshaft bank. And IN= intake camshaft back.

And that was supposed to say .13mm gap.
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Old 06-20-2013, 10:59 PM   #6
storm-chaser
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So I figured out I had some shims/buckets simply reversed from the reference point, so I switched them around and rechecked the pass side valve lash.

All are within spec except one valve. And that's only one notch below the minimum, so I'm not worried.

Drivers side head is the same, only one intake valve is below spec, exhaust is all good.

It seems the valves wear tighter over time. Seeing how this car has 211,000 miles on it all the valves are near the low limit, that's they only explanation I can think of.
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