Oil Fill Cap

[Rob M.]

All,
I believe I have an original '66 327/300 oil fill cap that is bare of paint. The JG calls out a semi-gloss black with a "dark greenish-black" finish. Does anyone have a paint that would correct for this finish? Would the Krylon 1613 be close?
Thanks in advance

[Edward J.]

Re: Oil Fill Cap

Rob, its really a plating, not paint. I do not know if any one makes anything close.

[Rob M.]

Re: Oil Fill Cap

Thank you for the response. I am assuming then in your opinion the JG is incorrect in this regard?

[Russ S.]

Re: Oil Fill Cap

I agree. It is a finish not paint.

Thank you for the response. I am assuming then in your opinion the JG is incorrect in this regard?

[Leif A.]

Re: Oil Fill Cap

Looks like this one...

https://www.parts123.com/parts123/yb.dll?parta~dyndetail~Z5Z5Z50000370a~Z5Z5Z5AACRZ~P33.00~~~~S5900UXON610720612150e~Z5Z5Z5~Z5Z5Z50000370a

[Rob M.]

Re: Oil Fill Cap

Well, I have what I believe to be the original off my car. The stampings and configuration of the underside tabs is correct. However, the finish is gone and a prior owner had painted it engine color. So, I've stripped the paint and was hoping to be able to return it to the correct finish. The JG calls out that is, "is either painted semi-gloss with dark greenish-black finish or chromate." So, anyone with an idea as to what paint might work?
Thanks

[Ralph H.]

Re: Oil Fill Cap

Rob, I just happened to see this. Mine is also original I believe, but had been polished until it was way too light in color. I think I got some blueing (firearms) for the finish. I will try & check to be sure. It now passes judging fine. Ralph Haun (I don't usually check here, so email me if necessary).

[Donald H.]

Re: Oil Fill Cap

The one in Leif's link is for a big block and those definitely had some sort of plated finish. I haven't seen a original 300 HP one, but I recently purchased an original chromed 350 HP cap (very rare). Here's a couple of pictures on the difference in an original, a reproduction, and what I believe is a old service replacement one.

The one on the left is a recent reproduction, the middle is what I believe is old service replacement, and right is original. The characteristics of the 300 HP cap is the same, just black instead of chrome.

Note the deep dimple in the original rivet on the inside. And how flat the bottom of the tang that holds the cap on is on the original. Both the reproduction and service replacement have a curve in the tang.

[Joe L.]

Re: Oil Fill Cap

Rob------


I agree with those that have said it's a plated finish, not a paint. As I recall, I have several NOS examples of this cap. I can't post a photo of one right now since I'm 7,000 miles away.

The finish seen on the LIC big block cap is not quite the same as that on the cap in question which has a much "smoother" finish.

[Rob M.]

Re: Oil Fill Cap

Thanks Don,
I agree with you and mine shares the same characteristics as your original. It has very little to no plating on it anymore as after cleaning the engine orange paint off of it applied by a prior owner. I might try gun blueing on it to see it that might get the finish close.
Thanks all

[Joe L.]

Re: Oil Fill Cap

Thanks Don,
I agree with you and mine shares the same characteristics as your original. It has very little to no plating on it anymore as after cleaning the engine orange paint off of it applied by a prior owner. I might try gun blueing on it to see it that might get the finish close.
Thanks all

Rob------

If you look in Noland Adams' 63-67 Restoration Guide book, there MIGHT be a blueprint of this cap with a specification as to finish. I seem to vaguely recall there might be such a print. Of course, it has to be a blueprint of a cap of the same part number originally used for the 300 HP application. I can't check my book because I'm 7,000 miles away from it.

[Daniel S.]

Re: Oil Fill Cap

Hi Rob, great meeting you at the National Convention. Congrats on a super '66 Convertible with a National Top Flight award!

Dan

[Rob M.]

Re: Oil Fill Cap

Thank you Daniel! It was an honor to meet you and your family ... including that beautiful Bowtie '67!! I look forward to seeing you again soon. Anytime you're out in the San Diego area, let me know and drinks on me.

[Tony S.]

Re: Oil Fill Cap

Joe Perri described the plating as black zinc. I purchased one of his restored BB caps at BG last month. It looks really nice.