Green assembly line oil filter question?

L-72 1851 658

it's also early to mid 70's but it's well known the pt # was applied to numerous filters

ok so late 50s to early/mid 70s then?

yes, same part number, but the part changed throughout the years

part changed how? appearance? color? raised M vs. the raised triangle with recessed center?

any break down for the years when those different ones would have been? I seem to recall the red, white, and blue one being 1972 and after.

Anyone have some good close-up photos they can post of the green filter? Need all around photos.

Thanks, Dan

Green 1851658 green rough texture filters started use in 1966 as seen on the box on the right 10-26-6.
The later boxes had no date and these filters were used up until and including 1971.
I believe they were painted in batches over the years which accounts for some shade variation.

Easy to remember...red, white and blue for 72....( and later, as seen with this 73 dated filter ).

Has anyone figured out what the "texture" is? Doesn't appear to be sand, but maybe I'm wrong. How were they painted - sprayed or dipped? Looks as if the "texture" is in the paint, not applied after being painted.

Thanks, Dan

Also looks like the tooling was showing a bit of wear in it's later years based on the M on the left hand example

Front

Back

thanks

So did the same long style filter come on all engines or did a shorter filter get installed on some?

Mopar even made red/white/blue filters for brand X cars but used their Mopar logo

Here's a few more oddball ones for brand X cars, a black one and a blue one...neat for display only

Then there is this one that has me stumped...number shows up nowhere but it is identical to the 1851658...embossed M, rough texture, script, etc, but with the number 2806201

... and then there's this oddball one with a fratzog on top (truck? other?)

... plus this style which probably pre-dates the red-white-blue version I'd guess.

Generally, I think the part numbers followed this format:
1 = 1950 decade (2 = 1960s, 3 = 1970s and so on)
8 = the year of that decade the part was first used (18 = 1958)
5 = parts group?
Now that whole 34***** for the a/e/b body parts from 1970 who knows...

Another picture.

Another.

One more.

Some buy gold, I buy filters lol

I bought this masterpack of filters at a dealership many years ago. Box is dated..No they are not for sale-sorry!

#3-I think there were several different tools. The filter at the far left was made much later than the green ones but has sharp edges.

#4

#5

Date code? Different stamping for sure..

Another date code? Notice this is one of the white filters but still has texture!

Hi all;
Can I add a little history to this discussion, based on my 25+ years working for Mopar Parts Division?
A few items;
- Spin on filters were introduced with the 58 "B" engine series, and were painted black with a yellow-orange "Forward Look" Mopar logo. existing engines carried over the old canister type filter, but most of these were changed to spin on for the 1963 model year.
These filters had a canister with a quarter sized dimple in the center of the can end.
-Sometime in the mid 1960's Mopar changed over to the "OMEGA M" logo, after Corporate dumped the Forward Look logo for the Pentastar. I don't yet have a date for this change. That change spread to oil filters installed on the assembly line. The higher volume filters also got the Omega M stamped on the end of the filter canister.
-Mopar parts were sold via two distribution systems, dealers (sold all parts) and independent parts distributors, who sold a selected line of fast moving maintenance and repair parts; this independent distribution chain lasted until about 1980.
- Independents demanded a simple and logical part numbering system, unlike Chrysler's random number system. This generated oil filter numbers like "L72"(oil filter part 72), (this is the main Chrysler vehicle application) This was similar to Ford Autolite/ Motorcraft and GM AC/Delco systems.
-Dealers resented the added competition for the same part sold by the independents, so Mopar added a "Chrysler Parts" brand line in the mid 1960's; same part and number, but with the blue and while logo. The green parts with the Omega M went to the aftermarket, and to those Chrysler dealers who preferred to buy from distributors (less stock investment, sometimes cheaper prices).
-In about 1971, Mopar consolidated both logo styles into the red/white/blue Mopar parts logo parts. This is also about the time the "shorty" filter was introduced (1972), to address a change in the engine belts in "C" bodies.
- Mopar Performance reintroduced some of the older logo filters in the 1990's when I was Manager. We tried to get the logos as correct as we could but the engineering documents were not very clear. We wanted to add the Omega M to the canister, but we were told this was a weak spot in the stamping and could cause a lot of failures or scrap.
- Chrysler part numbers are almost completely random. Central Engineering issues a "block" of 50 or so part numbers to the individual Engineering departments to use for each new part released. The only thing you can tell form the number is the general year they were first used (excepting trim, accessories, etc., of course).
The five digit number found on many parts (eg. 42358)is the supplier code, each supplier was issued one when approved by Purchasing.
I hope this helps. Questions welcome, as best as I can answer.
Mark