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Discussion Starter #1
Another "Fox Valve Covers" Thread - Year Differences

I had my passenger-side VC off to replace the gasket, and have a rocker kissing the cover again. I've been able to massage things in the past to get them to clear, but am getting tired of the precision fitment needed every time a cover gets pulled off, so I'm considering going with a set of Fox covers.

I've read several threads both here and elsewhere proclaiming everything from "They fit without modification" to "They fit but you have to grind them here, and grind them there, and replace the baffle, and re-weld the filler neck..."

I *think* the difference comes from people using 87-92 covers vs. those from a '93.

What I've pieced together:

1) In the '93 Fox covers, it looks like Ford removed the vertical "ribs" along the sides inside the covers which people have indicated need to be ground down on others. These seem to have an "F2" or "F2A"stamp inside, as well(?).

2) It appears that the oil filler neck on some covers ('93 again?) is closer to the front of the valve cover than others. This might explain why some clear the TB and others don't?

These two factors might be determinant in proper fitment on the 94/95, although different heads will likely change the formula, as well. (I'm running GT40-P's.)

I'd like to verify this if anyone has definitive info.

Thanks,

Andy
 

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valve covers

Not sure if it would help in your case, but an old school trick is to double up the valve cover gaskets, getting just enough clearance to fit and clear the rockers.
 

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Discussion Starter #3
Actually, it probably would, except I'm already using a gasket that's 5/16" thick now, and not sure going thicker would be wise. Maybe if I added the thinnest one(s) I could find. I have to be careful with clearance of the EGR mounting point on the intake, though. I can currently slip 2-3 sheets of paper between it and the VC. Nothing a hit with the grinder couldn't remedy, I guess, for a small relief.

The good news is I was able to loosen the VC this evening, and "persuade" it to move a few more thousandths, and the offending rocker is no longer tapping on it. I'm thinking of still getting the fox covers and trying to make them work though, so I don't have to deal with this "micro-clearance" in the future.

The oil filler position will be critical, as there's a lot of stuff running past the current one, as well as the TB interference concern.

Andy
 

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Discussion Starter #4
An update: I have seen side-by-side pics of covers from a '93 and from a previous year, and can confirm that the '93 covers do not have the vertical ribs inside. The '93 covers also do appear to position the filler neck further forward than the earlier units. Whether or not it's enough to make a difference on fitment remains to be determined. I'm hoping to get better pics of this, and also to verify the year of the older covers.

Andy
 

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i got a set from a lincoln mark 7 i unbolted the baffle and they fit flush without doing anything else and the bolt on the alternator ddnt interfere either
 

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Discussion Starter #9
Hi Andy,
I have a few 94/95 customers that use the TFS covers with Ultra Comp Pro-Magnum XD rocker arms with no issues.

http://www.summitracing.com/parts/tfs-51411801/overview/make/ford

http://www.summitracing.com/parts/cca-1833-16/overview/make/ford
Thanks, Michael. The TFS covers should work even with my rockers, but I don't really want the logo'd covers (although I guess it already says "Trickflow" on the intake) and prefer the clean look of the Fox covers. I'm also trying to avoid spending $130. ;)

I've gotten mine to quit tapping again, but am still interested in seeing if I can make the Fox ones work. This investigation has two purposes: 1) To help me :), and 2) to help others (hopefully) down the line.

Andy
 

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Thanks, Michael. The TFS covers should work even with my rockers, but I don't really want the logo'd covers (although I guess it already says "Trickflow" on the intake) and prefer the clean look of the Fox covers. I'm also trying to avoid spending $130. ;)

I've gotten mine to quit tapping again, but am still interested in seeing if I can make the Fox ones work. This investigation has two purposes: 1) To help me :), and 2) to help others (hopefully) down the line.

Andy
Not a problem, good luck.
 

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Discussion Starter #11
Thanks, Michael. The TFS covers should work even with my rockers, but I don't really want the logo'd covers (although I guess it already says "Trickflow" on the intake) and prefer the clean look of the Fox covers. I'm also trying to avoid spending $130.


I've gotten mine to quit tapping again, but am still interested in seeing if I can make the Fox ones work. This investigation has two purposes: 1) To help me
, and 2) to help others (hopefully) down the line.

Andy
Not a problem, good luck.
Thanks, Michael. Your input is much appreciated.

Andy
 

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Discussion Starter #12
I received the '93 Fox VC's last week, and took a look at things this past weekend.

First, some pics:

'89 Fox Valve Covers


'93 Fox Valve Covers


Inside - '93 VC's (Left) and '89 VC's (Right)

Confirmed:

1) The '93 covers do *not* have the vertical ribs inside.
2) There is an "F2" designation stamped iinside the '93 covers I received.
3) The oil fill on the '93 VC's is placed forward of those on the '89 covers.

From eyeballing things this weekend. it appears that the oil fill on the '93 covers will not interfere with the IAC, TB, etc. For now, my stock covers are remaining in place, but the next time the intake comes off, I plan to work on fitting these.

Hope this info helps someone in the interim.

Andy
 

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all i had to to fit the passenger side cover was unbolt the baffle. i think if i trim it it will fit with a partial baffle installed. i dropped the other cover on the passenger side and it fell right in place. it didnt touch the alternator bolt at all some paople say touches with fox covers
 

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Discussion Starter #15
You also need to remember that fox covers won't clear an alternator if you're using it in the OEM location.
That's a point of debate. I've read where people have had trouble, and there are those who have them clear the alt like mentioned just above. Maybe this can be attributed to production tolerances.

Andy
 

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Just saying :shrug: that's a bit more than a slight production tolerances
I've swapped fox covers on my old 95 GT and my 94 Cobra. The GT required me to grind some of the valve cover to clear the alternator bolt. My Cobra did not require any modifications, the alternator bolt just barely kissed the valve cover when everything was bolted up. And of course with an S Trim it's nowhere near hitting lol.
 

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as mentioned, it's not hard either way. put them on my old 95 GT and 94. both needed the inside clearanced with a grinder for the roller rockers. and both needed clearanced for the alternator. don't paint/polish/powder coat until you've made sure they fit.

best valve covers IMO. cheap and look good when cleaned up. also seal great.

mike
 

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Discussion Starter #19
Just saying :shrug: that's a bit more than a slight production tolerances
I've swapped fox covers on my old 95 GT and my 94 Cobra. The GT required me to grind some of the valve cover to clear the alternator bolt. My Cobra did not require any modifications, the alternator bolt just barely kissed the valve cover when everything was bolted up. And of course with an S Trim it's nowhere near hitting lol.
Do you know what year(s) the Fox VC's were? I'm convinced this is a factor with the internal clearance, and now am wondering if it plays a part in the alt clearance, too

Andy
 

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Discussion Starter #20
as mentioned, it's not hard either way. put them on my old 95 GT and 94. both needed the inside clearanced with a grinder for the roller rockers. and both needed clearanced for the alternator. don't paint/polish/powder coat until you've made sure they fit.
...
Same question, Mike. I am betting both sets were pre-1993?

Andy
 
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