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11-30-2004, 06:12 PM
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valves hitting covers
Ok I need help. I am not new to this game but New to chevy motors, why are the valves hitting my valve covers on my 1974 chevy 350? they are adjusted to specs but they are just starting to tap the valve covers. Help!!! Really confused.
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11-30-2004, 06:19 PM
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rocker arms vs rocker covers
An easy cure is to run two neoprene rocker cover gaskets, and glue them together with a light coat of rtv. No need to spend big $$$$$$$$ on fancy rocker covers.
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11-30-2004, 06:29 PM
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not to sound stupid but that will fix the valves hitting on the side of the covers? i am eager to learn about the chevy moters, I was brought up on chrysler and this is really odd to me.
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11-30-2004, 06:29 PM
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If the motor is all stock, I think something is messed up pretty bad....
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11-30-2004, 06:38 PM
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rocker arms vs rocker cover
I agree with snod 83, if you are running a stock cam, something is definately wrong. I would suggest taking the covers off and try to discern exactly where they are hitting.
Double gasketing will cure the problem of rockers hitting the top of the rocker cover when you have a very high lift cam, as it raises the cover about 1/8th- 3/16ths inch. You definately shouldnt be hitting with a stock cam or even one with a lift under .500". Are they hydraulic or solid lifters? How did you adjust the lifters?
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11-30-2004, 06:39 PM
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solid lifters, and thats what confuses me, the motor has about 90 thousand on it and it runs really great, but being the first chevy i have worked on i need all the help i can get.
To my knowledge everything is stock I bought the truck from an old farmer and he used it around the farm only.
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11-30-2004, 06:41 PM
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You didn't give a great description but SBC VCs have a top and bottom side. It is possible they are on upside down.
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11-30-2004, 06:42 PM
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rc vs ra
sounds to me like your valve lash is set too loose, for starters. Solid lifters will have a slight clicking sound anyway, as that goes with the beast, due to clearances etc. What is the lash supposed to be?
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11-30-2004, 06:45 PM
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I will really be upset if the valve covers are upside down, why did chevy make them like that and how do I tell?
I will have to go back to the Chilton's book I bought to tell you what I set the lash at, They do have a slight tick but I adjusted them, to what the book called for.
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11-30-2004, 06:51 PM
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rc vs ra
Start with if theres any writing or letters on them?
where is your filler cap? were is your pcv located? Is your oil filler cap located on the drivers side front and the pcv located on passenger side rear? The slight ticking from the lifters is a good thing. If you didnt have it you would know you set the lash too tight.
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11-30-2004, 06:55 PM
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no writing, oil filler cap drivers front. pcv pass rear.
I appreciate this help
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11-30-2004, 06:55 PM
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You should just be able to look at them and tell.
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11-30-2004, 06:57 PM
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rc vs ra
Curious, I wasnt aware they put solid lifters in 350's in the 70's pickups. I thought they were all hydraulic.
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11-30-2004, 07:25 PM
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maybe the guy i bought it from changed the heads. but not to sure, all though the valve covers are painted red and the rest of the motor is stock looking.
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11-30-2004, 08:16 PM
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On stock valve covers there is a tall and short side. Tall side goes up (by intake) short side goes down (by headers/exhaust manifolds).
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