roller rockers vs valve cover clearance - Vintage Mustang Forums
 
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post #1 of 14 (permalink) Old 10-17-2001, 02:02 PM
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I have heard that roller rockers do not fit under the cobra aluminum valve covers. Is it a design issue or a brand issue? IE, is it only certain brands of roller rockers that don't fit? Also, I have seen some stuff about the baffles in the aluminum valve covers being removed and replaced with a custom bent piece of sheet metal. Is this possible, ie, does the valve cover itself clear the rollers and the baffle doesn't?

BTW, I'm talking small block, 289/302 here.

Any info would be appreciated, thanks
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post #2 of 14 (permalink) Old 10-17-2001, 02:04 PM
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I can't speak to the aluminum covers, but the stock height steel ones worked with my Comp Cams rollers after taking a hole-saw to the baffles to clear the adjuster.

Cobranda has tall Cobra covers for rollers for a nominal fee.
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post #3 of 14 (permalink) Old 10-17-2001, 02:08 PM
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There is VERY LITTLE clearance, but I have a set of Crane 1.7 Rollers and they do clear the cobra valve covers. I thought I was going to have a problem, but didn't. I didn't bend the metal splash plate with a hammer to get a little extra clearance - I don't know if this was needed or not.
Some people do have problems, but you can get thicker valve cover gaskets (felpro's) that are about double the thickness of standard gaskets to get you some extra space.

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post #4 of 14 (permalink) Old 10-17-2001, 02:16 PM
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I had heard the taller covers were available but heard they looked cheesy. I'd rather go with drilling or bending the baffle if the original type will clear.
post #5 of 14 (permalink) Old 10-17-2001, 02:16 PM
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BTW, thanks for the info.
post #6 of 14 (permalink) Old 10-17-2001, 02:37 PM
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IIRC Branda also sells an aluminum spacer that fits between the VC and head to allow additional room for clearance of rollers. Good luck. Dickson

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post #7 of 14 (permalink) Old 10-17-2001, 02:44 PM
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I bought the tall COBRA covers from Branda and I think they look pretty good, you can see them on my web page (I painted mine and sanded the fins). The baffles are close but I didn't have to modify them. I think if I had gone with a different roller rocker (I went with the billet TFS rockers) I could've used stock sized covers. The Comp Cams Pro Magnums look like they'd fit without the tall covers.
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post #8 of 14 (permalink) Old 10-17-2001, 02:48 PM
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Branda also sells the tall cobra valve covers but they are around $180. I have the regular cobra covers with the baffel cut out but it sucks the oil out. Check the location of the hole in relation to the rocker arm and you'll see what I mean.
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post #9 of 14 (permalink) Old 10-17-2001, 03:16 PM
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Here is a link that probably addresses the issue you.

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post #10 of 14 (permalink) Old 10-17-2001, 03:47 PM
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Here's an article concerning the rocker/valve cover clearance issues. It also discusses the baffle openings.
post #11 of 14 (permalink) Old 10-17-2001, 03:47 PM
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Here's an article concerning the rocker/valve cover clearance issues. It also discusses the baffle openings.
http://www.mustangworks.com/articles...StandTall.html
post #12 of 14 (permalink) Old 10-17-2001, 05:13 PM
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I have roller rockers and open letter cobra cast aluminum
(old) they fit fine with cork gaskets and some baffle adjustment.
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post #13 of 14 (permalink) Old 10-17-2001, 06:20 PM
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I have a 302 & a 351W with roller rockers. The 302 has Ford Motorsport low profile rockers and the 351W has CompCams roller tip rockers. Both easily clear the chrome Motorsport valve covers with no bending or other modifications.

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post #14 of 14 (permalink) Old 10-17-2001, 06:21 PM
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The experience I've had with roller rockers, it's not the rockers, but the tall poly-locks (adjusting nuts) that hit.
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