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Tall valve cover that fit Jesel Shaft mount...Mine doesnt (Proform)...

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Tall valve cover that fit Jesel Shaft mount...Mine doesnt (Proform)...

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Old 06-16-2018, 04:03 PM
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always faster
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Default Tall valve cover that fit Jesel Shaft mount...Mine doesnt (Proform)...

Got a darton sleeved ls2 427 ci with some ETP Ls7 heads.
Using Jesel mohawk shaft mount.

I tried to make my Proform tall valve cover fit but they wont.The cover sit on the top of the rockers...
The bolt holes dont line up by something like 1/4 " ...
Even if i would like to make some grinding\clearance i would end up grinding the gasket groove...

What are you running to clear those ???
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Old 06-16-2018, 07:53 PM
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My proform fit with my trickflow 245. I have Proform 141-262 Valve Cover with jesel shaft mount.
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Old 06-16-2018, 07:59 PM
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Old 06-17-2018, 07:42 PM
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Strangely....

Up until my TFS head blew apart, I was using Proform which fitted just fine.

I've recently just refitted some old Edelbrock heads I had as it was cheapest option to get going again and the fixing holes did not align with their hex stud adapters under the cover. In my case the hole was maybe 4mm or so off alignment with the hole being too high.
Whilst a little crude I simply loosened the hex adapter inside to allow a little movement on it and I was able to get the bolts in like this. Not a perfect fix, but I didnt fancy drilling the covers which would probably see more chance of oil leaks around that area.

So the problem isnt so much the covers...as the heads in my case.

Probably if you were to revert to a long bolt with a spacer sleeve inside the cover it might allow a little more movement to line up. The actual base where the hex adapters bolt to on the head must be at a slightly incorrect angle
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Old 06-18-2018, 10:28 AM
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Originally Posted by douniasg View Post
My proform fit with my trickflow 245. I have Proform 141-262 Valve Cover with jesel shaft mount.
My Proform did clear my other Jesel shaft mount setup on my 799 heads but they aren't on my ETP...
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Old 06-18-2018, 10:28 AM
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Originally Posted by stevieturbo View Post
Strangely....

Up until my TFS head blew apart, I was using Proform which fitted just fine.

I've recently just refitted some old Edelbrock heads I had as it was cheapest option to get going again and the fixing holes did not align with their hex stud adapters under the cover. In my case the hole was maybe 4mm or so off alignment with the hole being too high.
Whilst a little crude I simply loosened the hex adapter inside to allow a little movement on it and I was able to get the bolts in like this. Not a perfect fix, but I didnt fancy drilling the covers which would probably see more chance of oil leaks around that area.

So the problem isnt so much the covers...as the heads in my case.

Probably if you were to revert to a long bolt with a spacer sleeve inside the cover it might allow a little more movement to line up. The actual base where the hex adapters bolt to on the head must be at a slightly incorrect angle
Well my english is not perfect but I'll try to be clear.

Even if I could play with the mounting it wouldn't fit since the cover are sitting on the rocker...
Not on the adjuster but on the back side of the rocker , the cover can't even slide down.
A lot of time you grind a small area in the head to clear the rocker rotation and that's fine .
I was thinking about making the same kind of grinding inside the cover to also clear the rocker .
But I would need to take way too much material.

Will try to take some pics tomorrow

​​​​​​​Looking at some Katech since they clear everything .

Last edited by always faster; 06-18-2018 at 10:30 AM.
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Old 06-18-2018, 10:50 AM
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Ahh, so your cover actually fouls the rockers ?

On both the heads I used they clear the rockers ok ( both cathedrals ), just that with the Edelbrocks the cover bolt holes would not align correctly.
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Old 06-19-2018, 10:26 AM
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Here are the pics, you can see that they dont fit.
You can also see that the gasket groove design could have been made more outward , it would have reduce the inside thickness and fit.

You can also see that the gasket groove is not even on the head surface.1/2 of it is but the other half not.

I cant move the cover down since it sitting on the rocker...

Will order some Katech and sell those
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Last edited by always faster; 06-19-2018 at 10:30 AM.
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Old 06-19-2018, 01:39 PM
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Now that I think about it, I might have had to clearance the covers a little for mine. Cant recall exactly. And your rockers are a lot chunkier than the Jesels.

And looking at photos, it looks like the gasket flange on your head is thinner than on my TFS225 and Edelbrock, the Edelbrocks have a pretty wide flange.
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Old 06-19-2018, 08:02 PM
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Maybe the offset rocker is causing a problem. I would sell the proform before modifying them.
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Old 06-20-2018, 11:18 AM
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Originally Posted by douniasg View Post
Maybe the offset rocker is causing a problem. I would sell the proform before modifying them.
And I think that you're right.Not all the rocker seems to touch the cover...

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Old 06-21-2018, 11:42 AM
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Katech Slotted with 2 blank insert have been ordered.
Will do my own engraving with my Mazak CNC .
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Old 06-23-2018, 04:22 PM
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Well i rceived the Katech and add some additionnal clearance on the notch that was already pre machined on the cover.
Now it seems to fit but ...

The gasket doesnt fully sit on the top head surface ...Maybe 50%.
You can see from the pics that it fit good on the 3 dip but not on the head ...

The only thing i could think by looking at my heads its that if you look carefully enough you can see that the the botton of the head isnt fully straight.You can see that there is 3 bump and 2 of them are exactly where the two valve cover support tab sit inside the head...It make the cover fit higher.
To solve that is to grind the two lower tab on the valve cover a bit but im worried that it will create some rocker rubbing and i dont have anymore space to grind...

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Last edited by always faster; 06-23-2018 at 04:24 PM.
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Old 06-23-2018, 05:07 PM
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Although mine are cathedrals...

Compared to the TFS, the flange around your head does look a little thinner.

Compared to my Edelbrocks...the flange on both TFS is a lot thinner

Have any covers you had fitted around that gasket area correctly ? If you remove the rockers, will a stock cover even fit ?
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Old 06-23-2018, 06:16 PM
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Well i tried to shave 1/16 of valve cover the supportig tab, gasket seems a bit better ,not perfect but better but now i lost clearance and the rocker are rubbing...
Notch the cover even more and still rub not a lot but,...it even think that it rub the valve cover gasket...

Now im stuck and dont know what to do...

Last edited by always faster; 06-23-2018 at 06:19 PM.
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Old 06-23-2018, 06:18 PM
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Originally Posted by stevieturbo View Post
Although mine are cathedrals...

Compared to the TFS, the flange around your head does look a little thinner.

Compared to my Edelbrocks...the flange on both TFS is a lot thinner

Have any covers you had fitted around that gasket area correctly ? If you remove the rockers, will a stock cover even fit ?
Dont know, Proform doesnt and now Katech doesnt...
Even without the rubbing issue, the cover seems way to far upward...

Last edited by always faster; 06-23-2018 at 06:35 PM.
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Old 06-23-2018, 09:34 PM
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IMO remove the rockers and try some stock covers.

Just in case something is fucked up with the heads themselves. In which case you'll just have to adapt some covers as a head swap is hardly likely. Or maybe some stock covers with spacers ?
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Old 06-26-2018, 10:32 AM
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Did some testing and the stock VC seems to have the same issue.
I ll take other pics and will make some other testing...
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Old 06-26-2018, 02:37 PM
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That's a very bad sign...and points in one direction !!

Manufacturer defect with the heads.

Last edited by stevieturbo; 06-26-2018 at 02:37 PM.
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Old 07-04-2018, 08:30 AM
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Well when you cant modify the VC to work ...just mod the heads.
Ill take my tig and weld some bead to create a thicker flange with some support underneath it and then will put the head in the cnc to have it perfectly straight.
Quick idea in red.

Done deal



Last edited by always faster; 07-04-2018 at 08:41 AM.
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