Early GTO oil filler caps

[60sStuff]

Things changed in 1966 in regard to the use of the K24/614 PCV.

If a ‘66 GTO was sold “New” in the state of California it would now have the A.I.R (Smog with air pump) on all models EXCEPT “Automatic with Tri-Power”.

1966 Engine codes with A.I.R. code #616 shown below.

WV - 4 Spd. / Tri-Power.
WW - 4 Spd. / 4BBL.
XE - Automatic / 4BBL.

The YR code Automatic / Tri-Power did Not require A.I.R. but instead was the last model to only have the #614 if sold New in California.

The ‘66 YR #614 utilized a molded rubber hose from the center carburetor over to a nipple on the chrome twist “sealed” oil fill cap.
The opposite RH valve cover was now solid (no holes or plugs).

The 1966 GTO with engine code YR had a build of 1759 total.
There is no record showing the total of the California YR with the #614 option, but it should be substantially less.

The ‘66 Car Billing History Card, as well as the Window Sticker shows #614 for this sold New in California YR GTO.

Chart showing Engine/Transmission with codes and total builds for 1966.

[60sStuff]

1966 was the first year of the “Smog” unit on a car sold New in the state of California.

Option #616 (A.I.R.) is the #614 and #612 combined.
There were three model GTO’s built with the #616 option.
WV, WW, XE.

614 = Special PCV with sealed oil cap and hoses going to the base of the air cleaner.

612 = Air Injection Exhaust Control.

The two color photos show a complete working unit (WV = Tri-Power / 4 Spd.) of which 1550 were produced.
This rare GTO once belonged to my friend Grant Baber.

The black and white photo is a magazine test car “WV” with 3x2’s and #616 option.

The last photo shows another ‘66 GTO test car with a 4BBL. and #616 option.

A few ‘66 Car Billing History cards show the #616 box pertaining to the “WV” engine code.

[60sStuff]

In ‘67 the #616 option became more efficient.

For the #614 portion some changes were made from the previous years.

1) A larger air cleaner base with a different style snorkel and a redesigned chrome lid.

2) The flat sealed AC twist oil cap that was first used in ‘65 on the RH VC is now being used again on the ‘67 on the opposite (LH) valve cover.

3) Likewise the metal pipe from air cleaner to the valve cover is opposite from ‘65.

The #612 portion was also redesigned with different check valves and piping to cylinder head brackets.

Photos, courtesy of Grant Baber of his 1967 GTO Survivor.

The Billing History Card of Grant’s car shows the Fremont build “Z” code.
Engine WW (2006 built).
The #616 option.

[60sStuff]

Follow-up on post #9 with the ‘66 Tri-Power with A.I.R.
Engine code WV (1550) produced.

This is a spare unit showing some up close views of this “one year only” complicated system.

The “Special air cleaner” for the air injection pump is unique.

The large plastic cap on the back unscrews to access the filter inside the snorkeled air cleaner.
This filter has a flat piece of perforated metal sandwiched between oiled foam.

Looking inside the air cleaner shows the accumulated dirt on the intake side of where the foam filter would be.

I have another separate air cleaner with the metal plate that has different wording on the cap.

NOS A224C oiled filter in plastic bag.

I purchased this ‘66 3x2’s smog unit about 40 years ago from an older gentleman at a swap meet. He said it had been sitting on the garage shelf for years.