These PML valve covers are standard flange mount covers for V8 small block Chevy engines (265, 283, 327, 350, 400). The valve covers mount on to the cylinder heads with four bolts on the perimeter, directly across from each other. These valve covers can fit the small block engines originally produced in 1959 to 1986 and many new crate motors.
We fit each cover on a stock GM cylinder head with stock rocker arms.
See SPECIFICATIONS for information to determine if these valve covers will for your engine configuration. Always check before ordering as PML has a restocking fee.
Dimensions: Click here for dimensions. A separate window will open and load the file.
Finishes: Read about finishes and construction of PML parts.
PML designed these valve covers with classic CORVETTE script and fins for a traditional look. This is a GM licensed product.
Benefits:
- Classic design
- Heavy duty sand cast aluminum construction
- Thick flange will not flex when bolts are tightened
- Mid height design to work with many roller rocker systems
- Standard perimeter 4 bolt mounting to cylinder head found on 1959 to 1986 Chevy small block engines
- Mounting bolts provided
- Made in USA
The script is cast into the cover and raised. On powder coated parts, the powder coat is shaved off the top of the script. On polished finish parts, the band is not polished to provide contrast to the script.
Engine configurations vary! Before ordering go to our CHECKLIST.
Will These Valve Covers Fit On Your Engine?
Engine configurations vary! Before ordering use our CHECKLIST.
We have a Loaner Program if you need a cover to test fit.
Gaskets
Gaskets are not included with these valve covers. PML designed these Chevy Small Block Perimeter Mount Valve Covers to work with cork composite gaskets.
Optional PCV, Breather, and Oil Fill Holes
PCV/breather/oil fill holes are optional. PML makes these valve covers without holes and can machine holes when needed for an engine configuration.
PML valve covers with optional PCV/breather holes.
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Our approach to PCV and breather holes is unique so we made a PDF file with pictures and details: PML Specifications on Oil Fill, Breather and PCV (click to view) (a new window or tab will open with a PDF file).
If these PML valve covers are ordered with PCV, oil fill and breather holes, PML will machine one hole in each cover on the intake manifold side and include a PCV grommet, a push-in breather, and an oil fill tube.
Call if your engine configuration requires one hole or to discuss your requirements.
PML machines the valve covers to order in our shop. We use four or five different tools, shown in picture, on a CNC machine to create neat, leak-free holes. Spot facing provides a smooth sealing surface for grommets.
Videos of PML machining holes: PML machining a PCV hole and PML machining breather hole.
Compared to Die Casting
These images show this PML valve cover compared to a typical die casting, GM part 3726086. Many original valve covers were die castings or stamped steel. Both have a smooth surface.
PML valve covers are sand cast aluminum, so they have thicker walls and have a rougher texture. The polish finish smooths the sand-like texture but the result does not look like a die cast or stamped steel cover.
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PML Valve Covers Compared to Stock
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