Will Bronco Script Valve Covers Clear Roller Rockers?

[Ol'Blue]

Ive got these covers on my non roller rocker 302 and want to use them on the roller 351w I have in the works.

Will they clear the roller rockers? Will the hit the baffles?

Trying to avoid pulling them off to check.

Thanks,

 

[lars]

Maybe.

I don't have those exact covers but I have some almost-the-same ones from Ford, for an EFI application. The baffle under the oil filler tube didn't clear, but I realized that if the threaded bosses for the baffle were a bit shorter then all would be well. A die grinder with a small abrasive cutoff wheel (a Dremel with the same would work equally well) let me remove 1/8" from the posts and all was well. As extra insurance, pick up some thick gaskets, like the metal core silicone gaskets that Fel-Pro, Moroso, etc sell. They are almost 1/4" thick and can make the difference.

 

[ford man]

You can also buy spacers to raise the valve covers up

 

[dmoses42]

Maybe.

I don't have those exact covers but I have some almost-the-same ones from Ford, for an EFI application. The baffle under the oil filler tube didn't clear, but I realized that if the threaded bosses for the baffle were a bit shorter then all would be well. A die grinder with a small abrasive cutoff wheel (a Dremel with the same would work equally well) let me remove 1/8" from the posts and all was well. As extra insurance, pick up some thick gaskets, like the metal core silicone gaskets that Fel-Pro, Moroso, etc sell. They are almost 1/4" thick and can make the difference.

Lars,

Are yours the "Power By Ford" ones from the mid 80s Mustang? I came across a set at the junkyard a while back and picked them up hoping I could use them on the Explorer swap I'm going to do.

Don

 

[Rebuilder]

I tried them on my 351 with roller rockers and they did not fit. They might fit with some rockers but not the ones I have.

 

[Eoth]

I swapped from my 1969 302 to my 2000 5.0 without issue.

 

[blade]

Those look similar to the covers on my 85 mustang gt. I had to remove the baffles to run roller rockers.

 

[lars]

Mine are these: https://performanceparts.ford.com/part/M-6000-J302R

My steel core Fel-Pro gaskets are 1/4" thick, and that was needed. The baffle under the oil fill tube hit the adjacent rocker, so I removed the baffle, cut down the cast-in bosses on the inside of the passenger side cover with a Dremel & cutoff wheel by about 1/4". That took care of clearance issues.

This was on a Blueprint 408 with the roller rockers they supply.

 

[Ol'Blue]

Thanks for all the feedback gents.

Will removing the baffles cause issues like oil leakage out of the breather or clogging the PCV?

 

[blade]

Thanks for all the feedback gents.

Will removing the baffles cause issues like oil leakage out of the breather or clogging the PCV?

I do get some oil in the breather. My motor had some miles on it when I put the rockers on so it has a bit of blow by. Not sure how it would be on a new build.

 

[DirtDonk]

I’m going to say yes it does.
Baffles are there for a very important reason, and most of them are under designed even in their full glory.
Removing or modifying them (unless you’re modifying them to improve their performance) will usually result in more oil vapor condensing up in the breather and PCV areas.

 

[DirtDonk]

So modify them carefully.
Remove them at your peril!

 

[lars]

I’m going to say yes it does.
Baffles are there for a very important reason, and most of them are under designed even in their full glory.
Removing or modifying them (unless you’re modifying them to improve their performance) will usually result in more oil vapor condensing up in the breather and PCV areas.

I can vouch for that. I had roller rockers on my 5.0, with OEM aluminum 88-93 Mustang 5.0 covers. Same clearance problem as with my current covers, eventually resolved the same way. But before that I tried the "no baffle" option. Bad idea. Lots of oil in intake.

 

[RuggedOverland]

We had these script covers on our 89 roller and the driver side baffle broke from the cover after a few thousand miles. Ended up going to a tall Ford Racing cover, had a little nicer baffle and no issues after a few thousand more miles.

 

[dmoses42]

Anybody know how deep in the valve cover the baffle needs to be to clear roller rockers, like laying a straight edge across the bottom and measuring to the baffle?

 

[DirtDonk]

You'll have to specify the exact roller rocker I think. They are most definitely not all created equal.
Big differences in width, height, arch, overall shape (and sometimes even reach) depending on aluminum, steel, stainless, stamped, cast, forged, roller tipped only or full roller.
Too many variables until you specify a brand and model and ratio and maybe even cylinder head model.

 

[fordguy]

mine did not fit and it got into using spacers, i abandoned the rollers.

 

[BroncoJimbo]

Mine fit over roller tip rockers but I had to fit the tallest gaskets I could find.

 

[Ol'Blue]

Hey all, I pulled the passenger side cover off and test fitted on the 351 and it clears, barely so I'm sure the drivers side baffle will have to come out. I've decided to order some tall covers to be sure. Looking at the Ford Racing -

FORD Ford Performance Parts 302-135 Ford Performance Parts Aluminum Valve Covers | Summit Racing

Free Shipping - Ford Performance Parts Aluminum Valve Covers with qualifying orders of $99. Shop Valve Covers at Summit Racing.

www.summitracing.com

and these Holley Sniper covers since the are beveled on both sides. Should help make room for brake booster

FORD Holley Sniper 890011B Holley Sniper Fabricated Aluminum Valve Covers | Summit Racing

Free Shipping - Holley Sniper Fabricated Aluminum Valve Covers with qualifying orders of $99. Shop Valve Covers at Summit Racing.

www.summitracing.com

Thanks for all the help!

 

[sprdv1]

Hey all, I pulled the passenger side cover off and test fitted on the 351 and it clears, barely so I'm sure the drivers side baffle will have to come out. I've decided to order some tall covers to be sure. Looking at the Ford Racing -

http://[URL]https://www.summitracing.com/parts/fms-302-135/make/ford

[/URL]

and these Holley Sniper covers since the are beveled on both sides. Should help make room for brake booster

http://[URL]https://www.summitracing.com/parts/sne-890011b/make/ford

[/URL]

Thanks for all the help!

Nice.. Good choice