Anyone ever used PBF valve covers with a vacuum pump/dry sump?

[blykins]

I'm wondering how hard it is to seal up the breather holes without welding or damaging the chrome.

[machoneman]

Nope. But Brent I can say I've never seen a OEM tin valve cover used with a vacuum pump or dry sump. I think that any stamped steel cover would be less effective than a cast (pot metal) due to overall rigidity and better sealing at the cover/head side.

That said, spot welding from the inside with a closely fitting plate to totally seal the opening may minimize damage to the chrome but even that is iffy.  Would still have that ugly hole. Suggest finding a rubber/plastic plug (Dorman?) to fill the hole instead.

[Stangman]

The rubber plug is a good idea. Is it a round hole or a twist cap? You can also silicone gasket to cover and then silicone cover and gasket assembly to block. Should seal. Just a little tougher than using the cast covers.

[blykins]

They will be twist caps.  That makes it hard because the hole isn't exactly a hole, it's a keyed hole.....harder to cover and seal. 

This is on my Tunnel Port and I'm trying to keep it looking period correct.

[mike7570]

eBay has some chrome pentroof valve covers with no holes.

[blykins]

Never been a big fan of the pentroofs, but it's an option.  Another option is a pair of M/T covers with no holes, but they're getting harder and harder to find in good condition.

[MeanGene]

Pentroofs are definitely period correct for a Tunnel Port setup

[Stangman]

I have a soft spot for the baldies and they dont have any holes. Not period correct like meangene says but you cant deny the cool look.
just gives it that stock look.

[JacksFordParts]

Never been a big fan of the pentroofs, but it's an option.  Another option is a pair of M/T covers with no holes, but they're getting harder and harder to find in good condition.

I have a few sets of M/T no hole covers Brent if you decide to go that route.

[rockhouse66]

Brent


Why not use a twist on cap with ears, like this one?


https://www.amazon.com/Trans-Dapt-4804-Chrome-Twist-Oil/dp/B000CQ20Y6/ref=pd_lpo_2?pd_rd_w=TyIHb&content-id=amzn1.sym.116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_p=116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_r=R0XZ0ZPCMNBCR23BY21C&pd_rd_wg=BXPV8&pd_rd_r=e13005ca-bb3a-4757-94ff-58125322f586&pd_rd_i=B000CQ20Y6&psc=1

[blykins]

Jim, that's certainly an option, as long as the gasket/seal is tight.  It doesn't take much to compromise the seal, sometimes I have to silicone around intake bolts, etc. 

There are some pictures floating around of a bunch of Tunnel Port crate engines at Holman Moody's shop and all of them have chrome PBF valve covers with the big cookie cutter oil caps.  So, I think I'll try one of the cookie cutter caps or a cap like you specified first and see where that puts me.  If it doesn't work, I'll probably hit Tindle up for some MT covers.

[FERoadster]

Brent: If Jack Tindel does not come up with a set, checked and I've got 3 sets here with the knockouts still intact.
Richard >>> FERoadster

[Falcon67]

I really wish I could buy either Ford Racing or even ProForm cask aluminum covers without the oil holes. I tried to get a seal using a vacuum pump and keyed hole covers and I never felt I got it done.  I was about to try some standoffs that required drilling around the holes when I found some NOS late 60s 351C covers that were undrilled.

I used this for the cover with a more precise drilled round hole: https://www.jegs.com/i/JEGS/555/52230/10002/-1
Similar - https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=SUM-440332

https://www.jegs.com/webapp/wcs/stores/servlet/SearchResultsPageCmd?q=681-MBR0011-10AN&storeId=10001&catalogId=10002&langId=-1

You might could use something similar with a machined washer under & over the cover to provide a basis to seal.  Not really old school.
Another option I considered: https://www.jegs.com/webapp/wcs/stores/servlet/SearchResultsPageCmd?q=497-1131&storeId=10001&catalogId=10002&langId=-1