Help with Final adjustments - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Born Lucky · 11-27-2011, 03:31 PM

I have had a reasonable difficult time adjusting my rockers. It seemed that every time I adjusted the rockers they would change. I came to find a large vacuum leak at the base of the carbourator, where the gasket goes. I changed the gasket and the engine runs well, what a diffferent.
I am now left with a rocker noise on load, that is when I give it gas. Is this good or do I need to further adjust my rockers. The sound is not loud but I some what feel to it should not be there.

protrash64 · 11-27-2011, 09:14 PM

Is this a new or old motor? I just fired up my 454 after an extended period of sitting and it rattled for awhile until it warmed up.....now it's ok.

'63GENIII · 11-27-2011, 10:13 PM

Do you have screw in studs and is it a stock cam or larger lift? I have had larger cams actually unseat the press in studs and make adjustment impossible. You did use a zinc additive in your oil right?

Born Lucky · 11-27-2011, 10:50 PM

This engine is a 292 and I installed a new cam new lifters and new orings on the valves. I used a beak in oil to start her up.
Like I mentioned in my first post I ad a problem dialing in the rockers, but soon discovered a major vacuum leak. After fixing the leak the engine sounds and runs well. The only problem is that when I driving and it the gas it sounds like I still have to adjust the valves. I hear a little valve chatter.

Rich 5150 69 · 11-27-2011, 10:56 PM

Lifter clatter when accelerating under load...?

Born Lucky · 11-27-2011, 10:58 PM

Quote:

Originally Posted by Rich 5150 69

Lifter clatter when accelerating under load...?

Could you explain this further?

11-27-2011, 03:31 PM	#1
Born Lucky Registered User Join Date: Mar 2010 Location: St Charles MO Posts: 481	Help with Final adjustments I have had a reasonable difficult time adjusting my rockers. It seemed that every time I adjusted the rockers they would change. I came to find a large vacuum leak at the base of the carbourator, where the gasket goes. I changed the gasket and the engine runs well, what a diffferent. I am now left with a rocker noise on load, that is when I give it gas. Is this good or do I need to further adjust my rockers. The sound is not loud but I some what feel to it should not be there.

11-27-2011, 09:14 PM	#2
protrash64 Resistance is Futile Join Date: Dec 2006 Location: Mesa,Arizona Posts: 3,520	Re: Help with Final adjustments Is this a new or old motor? I just fired up my 454 after an extended period of sitting and it rattled for awhile until it warmed up.....now it's ok. __________________ 64 CHEVY PICK-UP > http://67-72chevytrucks.com/vboard/s...otrash+re-hash 64 CARRYALL >http://67-72chevytrucks.com/vboard/s...=1964+suburban 66 LB >http://67-72chevytrucks.com/vboard/s...d.php?t=427852 STRENGTH/DETERMINATION/MERCILESS/FOREVER .......posted via stationary device

11-27-2011, 10:13 PM	#3
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: Help with Final adjustments Do you have screw in studs and is it a stock cam or larger lift? I have had larger cams actually unseat the press in studs and make adjustment impossible. You did use a zinc additive in your oil right? __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

11-27-2011, 10:50 PM	#4
Born Lucky Registered User Join Date: Mar 2010 Location: St Charles MO Posts: 481	Re: Help with Final adjustments This engine is a 292 and I installed a new cam new lifters and new orings on the valves. I used a beak in oil to start her up. Like I mentioned in my first post I ad a problem dialing in the rockers, but soon discovered a major vacuum leak. After fixing the leak the engine sounds and runs well. The only problem is that when I driving and it the gas it sounds like I still have to adjust the valves. I hear a little valve chatter.

11-27-2011, 10:56 PM	#5
Rich 5150 69 Registered User Join Date: Nov 2009 Location: Galt, Calif Posts: 2,437	Re: Help with Final adjustments Lifter clatter when accelerating under load...? __________________ `64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip



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