Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**KyleSeal** · 02-28-2017, 12:33 AM

Does this work? I have Comp Cam 1.5 roller rocker arms, going to use a stock alternator bracket and the tall valve covers dont work with it. Will short style aluminum finned covers work with my rocker arms?

weim55 · 02-28-2017, 12:48 AM

Depending on the height of the rocker nut these will usually fit with special double thick gaskets from Summit for just this purpose.

Steve weim55 Colorado

**KyleSeal** · 02-28-2017, 12:52 AM

Quote:

Originally Posted by weim55

Depending on the height of the rocker nut these will usually fit with special double thick gaskets from Summit for just this purpose.

Steve weim55 Colorado

Rocker nut sits low inside the arm.

weim55 · 02-28-2017, 01:24 AM

Depending on the lift of the cam and design of the rocker arm the outer edges of the rocker might hit the curve at the top of valve cover. That thick gasket will usually cure that problem too.

Steve weim55 Colorado

James the III · 02-28-2017, 03:11 AM

Quote:

Originally Posted by KyleSeal

Rocker nut sits low inside the arm.

So, roller "tipped" rockers not roller rockers..

If these are the comp stamped steel ones.. (sounds like they are)you should have no issue..

Comp and others make narrow body alum full roller rockers just for installs like this,, or top bolt valve covers..
full roller rockers with fulcrum rollers use poly locks that are taller than the rocker body..

Cman60 · 02-28-2017, 03:33 AM

I just joined this forum because I bought a 1968 K20 yesterday. This is my first post.

I had a similar issue when using poly-locks with the LT-1 valve covers on my 1970 Z-28.

The roller tipped rockers did not pose a clearance problem, but the poly locks interfered with the cast oil drippers on the valve covers even with the double-thick gaskets.

I used Crower poly locks which solved my problem. They have a smaller nut.

You can see part numbers, measurements, and photos here:

http://www.nastyz28.com/forum/thread.../#post-3405256

Hope this helps.

**special-K** · 02-28-2017, 07:56 AM

^^^ Welcome to the board! And thanks for that good info in your first post. I have those valve covers on my 327 with stamped 1.5:1 roller tips, but haven't run the engine yet. I may need to know this.

Enjoy that K/20!

Mike C · 02-28-2017, 09:38 AM

I've run the cast Comp Magnum roller tip rockers on my Jimmy with LT-1 cast valve covers with integral droppers since '89. Anything with the compression "lock nut" shouldn't have any issues, only poly locks. And you can get lower profile poly locks and I think Crower is the source as mentioned above.

fatbass · 02-28-2017, 12:53 PM

As a "sanity check", pull the coil wire off then push and hold a valve cover in place on the head (unbolted) while a buddy bumps the engine over. You'll find out for sure if there is clearance or not.

B. W. · 02-28-2017, 12:58 PM

Don't know if this helps, on late model heads (center bolt) Comp Cams Magnum Rollers fit under the stock valve covers with .500" lift cam.

02-28-2017, 12:33 AM	#1
KyleSeal Senior Member Join Date: Mar 2014 Location: Toano, VA Posts: 893	Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... Does this work? I have Comp Cam 1.5 roller rocker arms, going to use a stock alternator bracket and the tall valve covers dont work with it. Will short style aluminum finned covers work with my rocker arms? __________________ "Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809

02-28-2017, 12:48 AM	#2
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 916	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... Depending on the height of the rocker nut these will usually fit with special double thick gaskets from Summit for just this purpose. Steve weim55 Colorado

02-28-2017, 01:24 AM	#4
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 916	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... Depending on the lift of the cam and design of the rocker arm the outer edges of the rocker might hit the curve at the top of valve cover. That thick gasket will usually cure that problem too. Steve weim55 Colorado

02-28-2017, 03:33 AM	#6
Cman60 Registered User Join Date: Feb 2017 Location: New York, Hawaii & elsewhere Posts: 19	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... I just joined this forum because I bought a 1968 K20 yesterday. This is my first post. I had a similar issue when using poly-locks with the LT-1 valve covers on my 1970 Z-28. The roller tipped rockers did not pose a clearance problem, but the poly locks interfered with the cast oil drippers on the valve covers even with the double-thick gaskets. I used Crower poly locks which solved my problem. They have a smaller nut. You can see part numbers, measurements, and photos here: http://www.nastyz28.com/forum/thread.../#post-3405256 Hope this helps.

02-28-2017, 07:56 AM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... ^^^ Welcome to the board! And thanks for that good info in your first post. I have those valve covers on my 327 with stamped 1.5:1 roller tips, but haven't run the engine yet. I may need to know this. Enjoy that K/20! __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-28-2017, 09:38 AM	#8
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... I've run the cast Comp Magnum roller tip rockers on my Jimmy with LT-1 cast valve covers with integral droppers since '89. Anything with the compression "lock nut" shouldn't have any issues, only poly locks. And you can get lower profile poly locks and I think Crower is the source as mentioned above. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

02-28-2017, 12:53 PM	#9
fatbass Registered User Join Date: May 2012 Location: South Ogden, Utah Posts: 172	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... As a "sanity check", pull the coil wire off then push and hold a valve cover in place on the head (unbolted) while a buddy bumps the engine over. You'll find out for sure if there is clearance or not.

02-28-2017, 12:58 PM	#10
B. W. Registered User Join Date: Nov 2014 Location: Bigfork, Montana Posts: 1,137	Re: Short-Style Aluminum Finned Valve Covers with Roller Rocker Arms.... Don't know if this helps, on late model heads (center bolt) Comp Cams Magnum Rollers fit under the stock valve covers with .500" lift cam.



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