Series 3 V12 E-Type Judges Guide

Engine Compartment

Engine Judge

Engine numbers are 1001 through 17000. The engine number is stamped on the left side rear of the engine on the horizontal surface of the mating flange for the transmission. All engines were 5.3L with the 1971 and 1972 engines using a 9:1 compression ratio and many common ancillaries. The 1973 and 1974 engines used an 8:1 compression ratio and shared almost all ancillaries.

The V12 E-type has no polished parts. Many of the aluminum parts were die cast and have a very shinny almost pit free finish.

There are three metal finishes employed on the Series 3 E-Type cars: ? Silver cadmium also referred to as cadmium, clear cadmium or bright cadmium ? Yellow dichromate also referred to as golden cadmium or yellow cadmium which is an etch applied to a silver cadmium part. ? Black zinc used on toothed washers, some specialized parts such as the Allen head door striker guide bolts.

Yellow dichromate is found on the following: ? Horizontal fuel rail ? Horizontal balance tube ? Emissions return lines to carburetors and the engine breather tub ? Bolts securing the inlet manifolds, water jackets to the head, nuts securing the "oval "feet" and the nuts securing them used on the air injection rails ? Bolts securing the rain shields ? Cylindrical "cup" on the gulp valve, check valve to the air injection rails ? Adjusting rods for alternator, power steering pump, A/C compressor and air injection pump ? Most of the large, coarse bolts securing items to the block (engine mounts, alternator/air injection pump mount bracket, power steering pump mount bracket) ? A/C hose couplings ? Ubiquitous cerated washers ? Electrical retaining clamps (metal loops attached to nearby bolts) ? Bolts securing air rails to inlet manifolds

The brilliance of the yellow dichromate is determined by the smoothness of the base metal, the copper underlay (when used) and the quality and thickness of the cadmium plate as well as the quality of the yellow dichromate solution and application. Just as in chrome plating there is a difference in the brilliance determined by the subsurfaces and the quality of the plating.

All parts supplied by Lucas are bright cad plated as well as the cam cover screws.

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Engine Judge Dichromate is found on the following:

? Most of the bolts on the engine are dichromate along with the cerated washers. ? The check valve and the cap on the gukp valve are yellow dichromate.

Silver cadmium is found on the following: ? All electrical relay covers ? Most brackets that aren't painted (brake fluid reservoir brackets, windscreen washer fluid bracket, regulator mounting bracket ? Cam cover screws. ? Wiper motor mounting plate and cover plate ? A/C dryer bottle canister cover ? Hydraulic lines (brake and steering rack) ? Brake caliper housings ? Suspension and attaching hardware ? All banjo bolts ? Bonnet locking plates and hooks on firewall ? A/C block at rear of compressor ? Steering rack mounting hardware ? Miscellaneous hardware

This partially assembled engine shows the mixture of yellow dichromate and silver cadmium

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JCNA Series 3 V-12 E-Type Judge's Guide

Engine Judge

Silver cadmium linkage and mount, yellow dichromate bolt and cerated washer, black zinc latches on linkage (early style)

Yellow dichromate tube, braided fuel return line and original style rubber hose connection (brown stripe)

? The plastic parts are diecast and hence a smooth and brilliant finish. ? Due to excessive heating, Jaguar did make a modification to the amplifier and moved it

from mounting directly over the valley cover to mounting it forward of the upper cross member just under the header tank. ? Extra cooling fans, carburetors, headers, horns, or other non-factory available items, for the model, are non-authentic. ? Hoses and hose clamps must match original equipment. ? The front or rear suspension, shock absorber or brake caliper components are not judged. ? Surfaces may not be replated other than as original e.g., cadmium cannot be replaced with chrome. ? Silver cadmium may not be replaced with zinc or yellow dichromate.

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Engine Judge

Bright Metal (Cam Covers, Carb Domes, Etc.)

Bright metal includes the following items: ? Rain Shields ? Cam Covers ? Throttle Linkage ? Bolts, Screws, & Fasteners ? Water Manifolds ? Heat Shields, Misc. ? Plated Small Parts

Rain shields are aluminum and may be highly polished

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JCNA Series 3 V-12 E-Type Judge's Guide

Engine Judge

Cam Covers

? Semi-gloss powder coated black and the ribs were broach cut exposing the aluminum. ? 1971 model has cast "JAGUAR" on the front portion of the cam covers. ? 1972-74 models have the "JAGUAR" decal on the front portion of the cam covers.

1971 Cast "JAGUAR"

1972-74 decal "JAGUAR"

? Cam cover screws are silver cad ?" hex head.

? The front of the cam cover uses four chrome plated dome nuts with copper washers.

Oil Filler Cap

The oil filler cap is located on the forward portion of the left cam cover. ? The first few 1971 models used an oil filler cap that is polished aluminum with the word

Jaguar engraved in the surface and filled with paint. The outside diameter is knurled and a fiber washer seals the cap. ? The mid 1971 and later model oil filler caps were powder coated black with little thumb wings and used a fiber-sealing washer.

Early Models Natural Aluminum

Oil Filler Cap

Most Models Black

Oil Filler Cap

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