496 build but tall valve covers wont fit - Chevelle Tech
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  #1  
Old Sep 24th, 09, 12:38 AM
70 SS 454 70 SS 454 is offline
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Default 496 build but tall valve covers wont fit

Hey guys
back to getting my 496 planned
currently running stock height valve covers with stamped rockers
want to run roller rockers
no way tall covers will fit beneath A/C compressor bracket and brake booster on driver side
and questionable if they will fit next to the A/C airbox on the passenger side firewall

what covers do you guys run to clear these problem areas yet be high enough to clear pro magnum or simliar roller rockers and studs?

anyone know where/brand of low polished cast aluminum covers (stock height unless there is another solution to problem above)

is there such a thing as intermediate height covers?
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Rich Baratta
Cocoa Beach, Fla
Team Chevelle #380
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  #2  
Old Sep 24th, 09, 1:24 AM
highdesert56 highdesert56 is offline
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Paul
 
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Default Re: 496 build but tall valve covers wont fit

I ended up running a 5/16" tall fel pro valve cover gasket with the stock gasket (glued together) with stock stamped steel covers to clear the aluminum roller rockers on my 496. The main clearance issue was with the exhaust adjuster hitting the v/c. If I had machined them down along with the rocker stud the 5/16" gasket by itself may have been enough. But as it is i have about 200 miles on it and no leaks or interference. This is in a '56 bel air with no air (lol) but might help you some.
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  #3  
Old Sep 24th, 09, 2:16 AM
kirkwoodken kirkwoodken is offline
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Ken
 
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Default Re: 496 build but tall valve covers wont fit

This can be a problem on SB's too.
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  #4  
Old Sep 24th, 09, 5:18 AM
wilmaya wilmaya is online now
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Wilson
 
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Default Re: 496 build but tall valve covers wont fit

Crower has .250 shorter locks available, I have them with their roller rockers and use a stock V/C.
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1970 SS396 Build Sheet Documented
496 10.5 UD Harold 243/249 650 Net SR, AFR/290's, Victor Jr. PS/1000HP, Pump Fuel
3000 Stall TH400 3.55 MT DR's 3980 w/Driver
Best ET 1.54 7.04/96.21 11.17/118.51 @ Musclepalooza Etown 2010
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Old Sep 24th, 09, 7:56 AM
Schurkey Schurkey is offline
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Default Re: 496 build but tall valve covers wont fit

454 in my boat has Pro Magnum rockers hiding under stock OEM stamped sheetmetal valve covers. I needed two valve cover gaskets on each side for clearance with the tall rocker nuts.

Tall covers are for clearance with stud girdles, not roller rockers.
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  #6  
Old Sep 24th, 09, 10:04 AM
Georgia69 Georgia69 is offline
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Mike
 
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Default Re: 496 build but tall valve covers wont fit

I don't have AC, but I did not find the brake booster to be a problem at all. These are stock covers with a 1.15" aluminum spacer from Stef's...still plenty of room between cover and booster...

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  #7  
Old Sep 24th, 09, 11:00 AM
ShouldntBeHere ShouldntBeHere is offline
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Alan
 
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Default Re: 496 build but tall valve covers wont fit

Comps Pro Magnums will fit I believe and Roller Tips will definetly fit as I have a set under stock BBC valve covers....ofcourse those are not full rollers though.
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  #8  
Old Sep 24th, 09, 11:05 AM
wilmaya wilmaya is online now
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Wilson
 
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Default Re: 496 build but tall valve covers wont fit

Rich, I built my Eng. using the shorter Sure-Locks with the A/C bracket in mind. But found a donner car to eliminate the A/C all together. Here's a picture of the eng. and it has Crower stainless roller's with their shorter locks. I'm using 1 std. gasket per cover.
__________________
NAPA PARTS GUY
1970 SS396 Build Sheet Documented
496 10.5 UD Harold 243/249 650 Net SR, AFR/290's, Victor Jr. PS/1000HP, Pump Fuel
3000 Stall TH400 3.55 MT DR's 3980 w/Driver
Best ET 1.54 7.04/96.21 11.17/118.51 @ Musclepalooza Etown 2010

Last edited by wilmaya; Oct 6th, 09 at 8:45 AM.
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