Adjusting rocker arms ??

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Jul 14, 2007 | 08:28 PM

fotyfobravo

Thread Starter

Drifting

Joined: May 2005

Posts: 1,909

Likes: 6

From: Lake Arrowhead - Georgia > 72 Base Coupe & 74 BB Roadster

Adjusting rocker arms ??

As some of you have seen and helped with, I have recently completed a total re-build of my 74 454. I did the "Lars method" of adjusting the rocker arms during the initial re-assembly. Upon starting this motor up ... after fixing a couple of vacuum problems - it has run AMAZING. Not the 1st click of a lifter - rocker arm.....nothing. No leaks ... nothing.

Soooo....what do I do today.

I pull the covers off and like a real dipstick, I decide to "snug up" the rocker arms.

Now it has a HUGE MISS at idle and throughout the rpm's. It sounds like its on the driver side exhaust. (1 3 5 7)

Do you suspect I slightly "over-snugged" a rocker arm and a valve is staying open. I'd appreciate some opinions BEFORE I pull the covers off AGAIN to fix my "mess up". I should have left well enough alone.

Thanks..........

Jul 14, 2007 | 10:18 PM

dath

Burning Brakes

Joined: Jul 2000

Posts: 1,162

Likes: 2

From: Beaverton, OR

Always go back to what you know and what worked. I'd readjust the lash following Lars's directions again. Out of curiosity, why did you decide to "snug them up"?

Jul 14, 2007 | 10:58 PM

SIXFOOTER

Le Mans Master

Joined: Jan 2006

Posts: 9,192

Likes: 27

From: Boca Raton Florida

LOL, Nope, pull em off and re-do it right

Jul 14, 2007 | 11:01 PM

73, Dark Blue 454

Melting Slicks

Joined: Mar 2005

Posts: 2,838

Likes: 10

From: Austin TX

Exactly what do you mean by "snug them up"?

Jul 14, 2007 | 11:01 PM

cardo0

Le Mans Master

Joined: Oct 2002

Posts: 7,098

Likes: 378

From: Las Vegas - Just stop perpetuating myths please.

Quote:

Originally Posted by fotyfobravo

I pull the covers off and like a real dipstick, I decide to "snug up" the rocker arms.
Now it has a HUGE MISS at idle and throughout the rpm's. It sounds like its on the driver side exhaust. (1 3 5 7)
Do you suspect I slightly "over-snugged" a rocker arm and a valve is staying open. I'd appreciate some opinions BEFORE I pull the covers off AGAIN to fix my "mess up". I should have left well enough alone.
Thanks..........

No man, u can't snug the rocker arms. U have set the lash of the lifter wither hyd or solid. If u snugged hyd lifters on closed vlvs then they are holding the vlvs open and never seating. U need to go back to find zero lash then 1/4 to 3/4 turn tight only.
Try drinking decaf too.