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Dimensions:
Click here for dimensions.
Number of Bolts: 7 per cover, on the perimeter
Finishes: Read about finishes and construction of PML parts.
These heavy duty valve covers from PML for big block Chevy engines feature raised CHEVROLET script and fins and top quality construction. The classic CHEVROLET script is licensed from General Motors.
Benefits:
- Traditional design and sand cast aluminum construction for an old-school look and feel
- PCV and oil fill/breather holes
- Holes have internal baffles cast to reduce oil blow-by
- Thick walls and gasket flanges for strength and a secure seal to the cylinder head
- GM licensed product
Chevrolet big block engines include: 396, 427, 454, and the 502
PML also makes a tall height version of this design.
We have some of these valve covers on SPECIAL:
Licensed GM product. All related Emblems and vehicle body designs are tradmarks of General Motors LLC, used under license to PML, Inc.
PML designed these valve covers using original GM cast iron heads. Chevrolet Big block engines include: 396, 427, 454, and the 502.
These valve covers are standard height on the inside but taller than stock on the outside because of the thick walls and script and fins on top.
Engine configurations so check clearances.
Loaner Program
We want to make sure you get valve covers that will work on your engine and you love looking at. With that in mind we have a program for borrowing a PML valve cover to test fit on an engine. Learn more about the PML Loaner Program.
Our thanks to those who have emailed us pictures.
- 1971 El Camino
- 1967 Chevelle
- 1962 Bel Air
- 1958 Nomand
- 1955 Chevy Wagon with 555 Engine
1971 El Camino, LS Engine
The Roadster Shop in Mundelein, Illinois, used a custom adapter to fit these PML Big Block Chevy valve covers on an LS engine during a restoration of a 1971 El Camino.
1971 El Camino
LS Engine
PML valve cover, driver side of LS Engine
PML Big Block valve covers on 1971 El Camino with LS Engine
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1967 Chevelle
Joe from Washington emailed us pictures of his 1967 SS396 Chevelle with a cast iron ZZ454 crate engine.
1967 Chevelle SS396
Right side of ZZ454 engine, PML valve cover, chrome breather, 1967 Chevelle
Cast iron ZZ454 crate engine, PML valve covers, chrome breathers, 1967 Chevelle
Installing PML valve covers on ZZ454 in a 1967 Chevelle
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1962 Bel-Air
Robbie Robinson provided us with pictures of his 1962 Bel-Air. He purchased these valve covers in the as-cast finish then polished the top of the fins and script.
Click on image to view a larger picture in a separate window.
1958 Nomad
The images below show PML Chevrolet big block engine valve covers installed on a 1958 Nomad with a 502 engine. Tommy from Atlanta shared these pictures of his beautifully restored Chevy.
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1955 Chevy Wagon with 555 Engine
Richard's 1955 Chevy Wagon made the cover of Cruisin Style magazine. He used polish finish PML valve covers to dress up the Chevy Big Block 555 engine.
1955 Chevy Wagon on the cover of Cruisin Style
555 engine with PML valve covers
Driver Side
close up of breather
Passenger Side
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Gaskets
Gaskets are not included with these valve covers. PML designed these Chevy Big Block valve covers to work with cork composite gaskets.
Breather and PCV Holes
PML Chevy big block valve covers have PCV and oil fill/breather holes and baffles cast into the covers. The internal baffles help prevent oil blow-by out the PCV and breather holes.
These holes work with standard 1 1/4 inch grommets.
If desired, a breather cap with a 1 inch outer diameter tube can be used with the breather grommet.
Close up view showing that the PML Big Block Chevy valve cover has a
good fit with grommet and chrome push-in breather cap installed
PML Big Block Chevy valve cover, breather grommet, and chrome breather cap
PML Big Block Chevy valve cover, breather grommet and chrome
breather cap installed, top view
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Checking Clearance
Click for dimension. A separate window or tab will open.
Engine configurations vary so please check for clearance for larger valve covers. The walls and gasket flange are thicker than stock and the fins and script add height to the top.
Look for clearance on the inside also, especially if you have roller rockers. A simple check can be made if you have the stock valve cover. Set the stock cover on the head and measure the distance, if any, between the gasket flange surface and the head.
The PML tall version of these valve covers is approximately 3/8 inch taller.
Included With Valve Covers
These valve covers ship with new mounting bolts and standard PCV and breather grommets installed in the valve covers.
Image shows polish finish valve covers. The same items are included for all finishes. Click on image to view larger in new tab or window.
Oil Drippers and Flange
:
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First image shows the inside of the valve covers with the cast in oil drippers. Second image shows the flange thickness.
Flyer
Click to view or print PML Big Block Valve Covers PDF Flyer. A separate window will open and load the pdf file.
PML Valve Covers Compared to Stock
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