Valve adjustment info found under hood (Periodic valve adjustement required?)

[cinder]

Go to http://www.youtube.com/watch?v=CcP1Lp2qPeM . Apparently none .

[cookiemonster]

Great news!

[cinder]

The label also states 0w-20 .

[adrew]

That doesn't apply to the valves - that means that no adjustments to idle speed (done with a screw back in the day) and things like that are necessary.

[Cobrajet]

That doesn't apply to the valves - that means that no adjustments to idle speed (done with a screw back in the day) and things like that are necessary.

You are probably right, but this label IS where valve lash specifications would be found, along with plug gap, idle speed, etc. Since it lists none of this and flatly says "NO ADJUSTMENTS REQUIRED", it may mean...well, precisely that. You'd think if the valves were meant to be adjusted, something like "SEE DEALER" would appear on the label.

And if somebody got an email from Mitsu saying valve adjustments aren't necessary, I guess that would seal it for me.

Does this engine really have solid lifters? That is something normally only found on high performance motors. Why? Because hydraulic lifters can 'under-pump' or 'over-pump' during very high RPM operation, and this can negatively affect performance.

I don't think anyone would call the 3A92 a 'high-performance' motor. Hell, does the Evo even have solid lifters?

[deleted user]

You are probably right, but this label IS where valve lash specifications would be found, along with plug gap, idle speed, etc. Since it lists none of this and flatly says "NO ADJUSTMENTS REQUIRED", it may mean...well, precisely that. You'd think if the valves were meant to be adjusted, something like "SEE DEALER" would appear on the label.

And if somebody got an email from Mitsu saying valve adjustments aren't necessary, I guess that would seal it for me.

Does this engine really have solid lifters? That is something normally only found on high performance motors. Why? Because hydraulic lifters can 'under-pump' or 'over-pump' during very high RPM operation, and this can negatively affect performance.

I don't think anyone would call the 3A92 a 'high-performance' motor. Hell, does the Evo even have solid lifters?

Solid lifters are ancient tech.

https://en.wikipedia.org/wiki/Hydraulic_tappet

regards
mech

[Cobrajet]

True. But hydraulic lifters are ancient tech, too. Solid lifters are usually only used in particular situations nowadays...hell, even back in the '60s they were only used for certain applications. Manufacturers love hydraulic lifters because they preclude the need for valve lash to be set manually on cars when they leave the factory. You start the new engine, the valves clatter and rattle for a few seconds, and then they are set. Forever.

I can find valve adjustment procedures for the 4B engines (so the Evo does have them), as well as an assortment of lifter buckets in different sizes which are used to do it. Solid lifters make sense on the 4B, since the Evo motor redlines at something like 7500 rpm. I can find NOTHING of the kind for either the 3A or 4A engines; both have been around since about 2004.

Somebody somewhere would have done this procedure by now...right?

[cinder]

Just posting what I discovered .

[db1980]

I like how the guy disabled comments so that people cant tell him he is incorrect... thus the spread of misinformation on youtube continues.

[ThreePot]

Well...you don't HAVE to adjust them....

I've got a parts breakdown if anyone want's to see it.

It's got buckets without shims. You replace the buckets to change the clearance.