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View Full Version : HOW TO M20 Valve Adjustment???


Slowered318
03-23-2004, 05:01 PM
Anyone have a step by step article on adjusting the rocker arm lash or "valve adjustment" on a 1991 325is (e30/M20) motor.. i need this ASAP!

thanks!

PS. Any links or articles would be helpfull, i've scanned maxbimmer and can't find anything! *sad*

EMPOWERD
03-23-2004, 05:19 PM
Remember the problem we had with Jon's brother's car Ryan? When I was moving the rockers up and down and noticed one of them had way more play? Well, there's a small cam in the rocker that gets pushed by the cam loab... that's what you adjust with a special tool (nail). Shim the spacing between the back of the loab and rocker cam adjuster to 0.012" cold. Everyone seems to use different specs, I prefer doing it cold because they're all uniform. To move the cam, leave the car in 4th gear and push it back & forth.

bmwm5lover
03-23-2004, 05:20 PM
i got mine done by charlie for around 60~$... Its gonna give u rougher idle....

EMPOWERD
03-23-2004, 05:23 PM
it sounds more complicated than it is... when done properly the idle will be smooth, not rough. (the whole point)

Slowered318
03-23-2004, 06:09 PM
Thanks Randy.. I got the valve cover off right now and giving it the old slowered treatment (painted on performance)

I'm pretty shure i know what i'm doing here but should I shim the rocker at the cam or at the valve stem???

Thanks 1.4 million buddy

Slowered318
03-23-2004, 06:10 PM
Originally posted by bmwm5lover
i got mine done by charlie for around 60~$... Its gonna give u rougher idle....

my cost $9.50 for feeler guage

HA HA! :moon:

bmwm5lover
03-23-2004, 07:25 PM
Originally posted by EMPOWERD
it sounds more complicated than it is... when done properly the idle will be smooth, not rough. (the whole point)
not in my case... idle was rougher after the valve adjustment...i feel jipped off...:mad: :huh?: :confused:

burtonownz
03-23-2004, 07:30 PM
I have an article that was posted by another BMW forum. Here's the link:

E30 Zone (http://www.e30zone.co.uk/technva.asp)

EMPOWERD
03-23-2004, 09:20 PM
sorry for the confusion... you shim the rocker at the valve stem. Just make sure the cam loab is on the opposite side (no tension) of the rocker arm.

Slowered318
03-23-2004, 11:47 PM
DONE.. thanks!

Miguel
03-24-2004, 05:17 AM
Originally posted by Slowered318
DONE.. thanks!

lol... you PwN3d urselF
inside joke

Slowered318
03-27-2004, 02:01 AM
Valve cover got the "slowered" treatment!

Slowered318
03-27-2004, 02:02 AM
same with interior... (shampo 'n' shine)

ZiMMie
09-08-2004, 10:15 PM
Lol u gotto love old thrend :cool:
dude give me some info on how to to the valve adjustment on a m10 motor the site tells u that that info its only for m20 motors..:

burtonownz
09-08-2004, 10:20 PM
Wish I could help you out. I just knew of that article from posting on E30Zone

ZiMMie
09-08-2004, 10:25 PM
am thinkin its the same concept but i dunno the valve clearence for the m10 motor.