Holley valve covers, grommets?

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bradr440

bradr440

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I have a set of Holley valve covers similar to the ones in the picture. Anyone else run these? Where did you get grommets and what breathers are you running?
I have a oil filler cap in one hole, so that leaves me with two holes 1 1/2 in diameter.
Thanks!

holley valve covers.jpg
 
I used twist on breathers, twist on stock type oil fill and a grommet like the one in the picture for PCV.
 
I have these on my 408 but when i bought them there were no holes in them yet, so I machined the covers to fit whatever grommets AutoZone had on hand
 
Im in the same boat here,for my edlbrock covers. If i find a block of rubber, im going to try machining what i need.
 
Check with Autozone, as they have a fair selection on the help wall.
 
bradr440 said:
I have a set of Holley valve covers similar to the ones in the picture. Anyone else run these? Where did you get grommets and what breathers are you running?
I have a oil filler cap in one hole, so that leaves me with two holes 1 1/2 in diameter.
Thanks!

View attachment 1715127418
Click to expand...
They are the same as the M/T valve covers but not the same as the Mopar Performance covers.

IIRC the 1.5" holes are for the push in breather and the PCV valve. The other knockouts accept a 1/4 turn cap (or breather). In fact, looking at your picture those two open holes may be the 1/4 turns.
Mattax said:
Holley p/n 241-214 has two grommets with a 3/4" PCV hole for the M/T valve covers.
Click to expand...

Long version & pictures here:
PCV grommet | Moparts Question and Answer | Moparts Forums
 
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I went on to edelbrock site to find grommets, nothin. The make tge cover,no grommet.im not giving up that easy.
 
Yes, dorman has a wide selection, but the measurement is actual o.d. So to find grommets will be a chore unless you can find an application that is a match to what you need.
 
Tooljunkie said:
Yes, dorman has a wide selection, but the measurement is actual o.d. So to find grommets will be a chore unless you can find an application that is a match to what you need.
Click to expand...

Yep, and thickness of the material the grommets go in vary also, adding another dimension to find.
(Like cast covers vs steel with a rolled edge to the grommet holes.)
 
Just went through the same thing with a set of old M/T valve covers I bought. Holley quit making the 1.5" grommet that bushes down to the pcv size. I found a 1.5" with a bigger hole and then a pack of 5 misc sizes at OReillys. So ended up with a grommet inside a grommet, but it works great.
 
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