Did it run better after adjusting valves?

Curiously if your truck ran differently post valve clearance party. Can’t do mine till Friday cuz my gasket didn’t show.... I’m really hoping this helps smooth mine out...

 

No appreciable difference in performance but may have saved the price of a valve job or worse.

 

I’m hoping they are tight enough that I will notice it...I look at it like this, if the clearance is extremely tight the valve will begin to open early and close late. Ideally you want .012”. Some people find less than .003 to nearly zero. That .010 is huge if you consider the timing of lobe contact. People spend hours “degreeing” cams on SB’s. Even a tenth of a degree matters to them guys. Oh my God I gave myself a headache. Good night.

 

I think you won't see much of a difference unless you've got a burnt one.

 

Won't see any difference with a burnt one either. Last I checked, burnt valves didn't give 2 shits about being properly adjusted.

 

A burnt valve isn't sealing the cylinder like it should, which causes a loss of power. Mine absolutely runs smoother after fixing the burnt valve and there are hills around here I no longer have to downshift on to climb.

 

That may be. BUT...

...The 'fix' wasn't adjusting the burnt valve...

 

Yeah, I get that. I'm not sure how it got implied that the fix for a burnt valve is adjusting it because it definitely needs more than that.

 

Dear Everybody,

The Toyota 5VZ-FE 3.4 V6 engine is, indeed, a mechanical valve lifter engine. A wise old mechanic told me many years ago that there is absolutely no need to adjust the valves unless they are consistently making a regular tapping sound. I have never adjusted the valves on mine, and our truck is smooth as hell. Mechanical lifter engines always have a little bit of valve noise when they are first started, but it goes away once the engine is warmed up, and oil is getting to the heads.

Take it easy,
Paul

 

I would rather measure the clearances regularly than listen for a sound. Previous owners didn't keep up with it and I ended up with a burnt one, totally preventable.

 

I can say it ran much better being it was just being started after being reborn .

The only way you might notice is something else was fixed along with the valve adjustment .

 

You also can't tell if a valve is to tight by listening. Only to loose will give you that sound your looking for.

 

Tru dat. A noisy yota valve is happy one

 

at what milage should one check their valve clearance. My truck runs great and only has 140k miles on it.

 

idk my truck runs like a top at 366,666 and I've never done any valve adjustments.

 

then I'll go with the if it aint broke don't fix it routine.

 

I get to replace my clutch disc, Pplate and Throwout bearing and have the flywheel faced....because I went that routine for a little too long with my clutch
I think unless there is excessive noise from your valves or you have reason to believe they are burnt, if it aint broke dont fix it

 

Not even on my Hondas.

I'd bet against it.

Degreeing a cam isn't exactly the same exercise as adjusting valves. And this isn't a SB that has high compression, beefy valve springs and a lumpy cam

The main purpose of valve adjustments is preventive maintenance. As in keeping them from failing by being too tight, or keeping them from beating stuff to death from being too loose.

 

I've heard every 50k.


Mine was at 207k when I went to check them and found the burnt one. It didn't run bad, I had no problem driving it cross country. But it definitely runs better now.

 

Just from mostly reading around forums these shim over bucket valves seem to start getting out of range around 200k miles, but it doesn't take long to check whenever you have the valve covers off, so whenever you replace the valve cover gasket or replace a timing belt you might as well check just to have a record at least.