PML Valve Covers for Cadillac 331, 365, 390, 429 Engines
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CADILLAC® 331, 365, 390, 429
Valve Covers

P/N 11073

PML Cadillac Valve Covers, Fins and Script, As-CastPML GM Licensing Stamp
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PML Cadillac Valve Covers, Fins and Script, Black Powder CoatedPML GM Licensing Stamp
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PML Cadillac Valve Covers, Fins and Script, PolishedPML GM Licensing Stamp
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As-cast finish
$310.00 (set of 2)
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Black powder coating
$425.00 (set of 2)
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Polished finish
$485.00 (set of 2)
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Dimensions: Click here for dimensions of PML Cadillac 331, 365, 390, 429 valve covers. There is 2.48" from the gasket surface to the top inside surface. On the outside, check for clearance with air conditioner, bracket, heating, cruise control and other parts.

Finishes: Read about finishes and construction of PML parts.

Benefits and Design

These PML Cadillac valve covers are designed for 1949 to 1967 Cadillacs with 331, 365, 390, and 429 V8 engines with four bolt valve covers.

PML valve covers are heavy duty and feature classic styling. Much thicker and stiffer than stock, these valve covers have a machined gasket surface for a secure seal.

The classic CADILLAC script and fins are cast into the cover and raised (not engraved). The script replicates the 1949 GM CADILLAC logo. These PML valve covers are licensed GM products. To highlight the CADILLAC script, powder coat is shaved off the top of the script and fins on the black powder coat finish, and on polished parts, we do not polish between the fins and the script.

We have two sets of these valve covers on SPECIAL: #187 and #195.

PML Cadillac Valve Covers, Fins and Script, Inside

Inside of PML CADILLAC Valve Covers

Picture shows the inside of the covers. Click on picture to view larger in a separate window or tab.

PML Cadillac valve covers have an open interior and pockets to clear most roller rockers. The picture also shows the thick, precision-machined gasket flange and the four mounting holes on the perimeter.

Engine Considerations

These valve covers are perimeter mount, with four bolts per cover, included. Some early engines require center bolt mounting and PML does not have valve covers for these engines.

For 1963 to 1967 390 and 429 engines, these valve covers will bolt onto the heads although the shape is different. You will need to use the earlier 1954 specified gasket to get the valve covers to seal on a 429 engine. The 429 gaskets will not work with these valve covers.

These valve covers are taller than stock with pockets to work with many roller rocker systems. Be sure to check clearance on the inside and outside for your particular engine configuration.

Stock engines may have air conditioners, heaters, cruise control units or other items close to the stock cover so these larger PML covers may not fit without modification. Click here for dimensions of PML Cadillac 331, 365, 390, 429 valve covers. On some stock engines,the compressor bracket hits our cover.

Most applications breath through the valley plate so these valve covers do not incorporate a provision for breathers or PCV.

Gaskets

We recommend using the 1949 to 1955 4-bolt gaskets. For example, our customers have reported that FelPro part number 5392 gaskets work well with these valve covers. PML designed these Cadillac valve covers to work with stock gaskets, available at many auto parts retailers.

Note that there are five different gaskets available. Later year gaskets (after 1955) may not work with these covers. Gaskets are not included with the covers.

PML Valve Covers Compared to Stock

PML Valve Covers Part Number 11073 height compared to stock  PML Valve Covers Part Number 11073, compared to stock
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These images show a PML valve cover compared to the stock cover. The outside dimensions are shown. The distance to the gasket surface maybe different. See the link below the "Buy Now" button for more information on dimensions.

Installations

We have see our Cadillac valve covers at shows installed on some beautiful restorations.

PML Cadillac Valve Covers on a 1960 Cadillac

The pictures below are of a 1960 Cadillac 2 door hard top with a 390 engine in Finland. The PML valve covers are in the natural cast finish. The owner decided to polish the top of the fins and script to give a little shine to the engine.

1960 Cadillac with PML valve covers   1960 Cadillac, PML valve covers, driver's side   1960 Cadillac, PML valve covers, passenger's side  
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PML Cadillac Valve Covers on a 1961 Cadillac

The pictures below are of Brent and Dana's 1961 Caddy at the SEMA show in November 2010.
1961 Cadillac with PML valve covers, whole car   1961 Cadillac with PML valve covers, driver's side   1961 Cadillac with PML valve covers, passenger's side  

PML Cadillac Valve Covers on a Roadster

Roadster with PML valve Covers   PML valve Covers on a Roadster, drivers's side   Click on images to view larger

PML Cadillac Valve Covers on a 1952 Allard

We took these pictures of a 1952 Allard J2X at the Grand National Roadster Show in January 2012. Lime Works Speed Shop did the restoration and the owner is Allan Beall. A 1953 Cadillac 331 cu. in. engine was installed and modified.
1952 Allard with PML valve covers    Additional pictures in our Facebook album.

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PML Cadillac Valve Covers on the Impaler

We saw this 1934 Ford with a 331 Cadillac V8 at the Grand National Roadster Show in January 2013. The PML valve covers, in the polish finish, look great on the engine.

1961 Cadillac with PML valve covers, whole car   1961 Cadillac with PML valve covers, driver's side   1961 Cadillac with PML valve covers, passenger's side   1961 Cadillac with PML valve covers, passenger's side
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For a larger picture, please click one of the above images. A separate window will open showing a bigger picture. (The larger pictures take a minute to display.)

PML Valve Cover Features:

  • Strong sand-cast aluminum construction
  • Thick side walls and gasket flanges that will not bend when bolts are tightened
  • Mounting hardware included

Learn more about finishes and construction of PML parts.

General Motors Trademarks are used under license to PML, Inc.