72 L48 oil filter reproduction

[Joe L.]

Re: 72 L48 oil filter reproduction

Technically magnets are forbidden also, but some judges sneak them in anyway. They are far less obvious than rulers or other measuring devices.

I am not so sure the difference between 1 1/2 and 1 5/8 inch can be discerned on the bottom of an installed oil filter, but I will leave that to individuals who are more agile than I. If one were looking for the difference between 7/8 and 1 1/2 I could agree. However, we routinely discern the difference between antenna balls. The smaller later size is 0.200 and the original size is 0.250. A look down the line of cars easily discerns this difference, but then one is making this assessment standing with the ball at eye level. That is far different circumstances than what is required to see the bottom of the oil filer.

Terry------


I think the "1-1/2" and "1-5/8" are the same----just a difference in the way folks measure them. That's probably why the JG says about "1-1/2".

[Jerome P.]

Re: 72 L48 oil filter reproduction

(I am not so sure the difference between 1 1/2 and 1 5/8 inch can be discerned on the bottom of an installed oil filter, but I will leave that to individuals who are more agile than I. If one were looking for the difference between 7/8 and 1 1/2 I could agree. However, we routinely discern the difference between antenna balls. The smaller later size is 0.200 and the original size is 0.250. A look down the line of cars easily discerns this difference, but then one is making this assessment standing with the ball at eye level. That is far different circumstances than what is required to see the bottom of the oil filer.)

Again just curious, but what is the correct dimension? — 1-1/2” per the guide or 7/8” per our historian, Joe.

joe and Terry I really do appreciate your comments.

[Tom R.]

Re: 72 L48 oil filter reproduction

Jerome
In all fairness to your AZ regional judges, and TM points to this, its a challenge judging some items on chassis to include the oil filter. I mean how much time does one want to be under there and study an oil filter whether the bottom is 1 1/2 o 1 5/8...and why its an assessment. Then to use the five elements of originality why an item is typical or typical of a factory installed item. I judge later years when oil filters are blue with a label. But if the can't see the label...then what? Benefit of the doubt goes to the owner. In your case, you were the beneficiary of what the judges could not discern.

[Jerome P.]

Re: 72 L48 oil filter reproduction

Tom, I understand what you are saying, totally. My questions and/or comments were just to get a better understanding of what is a correct filter.

I see you are also a late nighter!!!

[Tom R.]

Re: 72 L48 oil filter reproduction

I consider it an early morninger.

[Terry M.]

Re: 72 L48 oil filter reproduction

(I am not so sure the difference between 1 1/2 and 1 5/8 inch can be discerned on the bottom of an installed oil filter, but I will leave that to individuals who are more agile than I. If one were looking for the difference between 7/8 and 1 1/2 I could agree. However, we routinely discern the difference between antenna balls. The smaller later size is 0.200 and the original size is 0.250. A look down the line of cars easily discerns this difference, but then one is making this assessment standing with the ball at eye level. That is far different circumstances than what is required to see the bottom of the oil filer.)

Again just curious, but what is the correct dimension? — 1-1/2” per the guide or 7/8” per our historian, Joe.

joe and Terry I really do appreciate your comments.

Jerome

There is considerable discussion, with no clear answer, as to what constitutes an original early C3 oil filter. In the TIM&JG for both 1968-69 and 1970-72 there is a photo of original oil filters found on Camaro and Nova of the period. They bare no resemblance to what we have been describing. We all agree that it is likely that Chevrolet used a distinctive (in small or large ways) oil filter for guarantee purposes, and since the engines in those other vehicles were produced on the same assembly line as Corvette motors one might expect all original oil filters to be of the same appearance. The problem we have is that it appears all Corvette owners were good owners and changed the oil and filter at some point early in their ownership. We have yet to find a Corvette with what anyone believes is the factory installed oil filter. And we have found Corvettes with as little as 478 miles.

All the above is a long winded way of saying we just don't know what the factory installed oil filter was. All this thread has been about over-the-counter filters using the assUmption that those were the same as factory installed units. There is no reason to believe that assUmption is valid, and every reason to believe it is not.

[Tom R.]

Re: 72 L48 oil filter reproduction

All the above is a long winded way of saying we just don't know what the factory installed oil filter was. All this thread has been about over-the-counter filters using the assUmption that those were the same as factory installed units. There is no reason to believe that assUmption is valid, and every reason to believe it is not.

and factory filters arrive in those cute little boxes but cases with 12-24 in a case. If you have what you believe to be an original oil filter in one of those cute boxes, its as TM states...OTC.

[Ken R.]

Re: 72 L48 oil filter reproduction

We judged a 78 pace car at Bowling Green regional several years ago that the collector person from Indiana had just bought. I don't remember the actual mileage but it was in low double digits. It still had the original oil as well as filter. I remember sayin that I thought it was time to change the oil.

[Terry M.]

Re: 72 L48 oil filter reproduction

We judged a 78 pace car at Bowling Green regional several years ago that the collector person from Indiana had just bought. I don't remember the actual mileage but it was in low double digits. It still had the original oil as well as filter. I remember sayin that I thought it was time to change the oil.

I hope you made notes of the filter configuration, including the label. I also hope you asked the owner to save the filter.

I saved my original filter from the 2008 Z06, but so far that is beyond the scope of our interest. But at this point I think I better dig that out and send pictures to the guys working on the C6 manual.

[Edward J.]

[Harry S.]

Re: 72 L48 oil filter reproduction

I hope you made notes of the filter configuration, including the label. I also hope you asked the owner to save the filter.

I saved my original filter from the 2008 Z06, but so far that is beyond the scope of our interest. But at this point I think I better dig that out and send pictures to the guys working on the C6 manual.

Terry, I have mine from my 2006. It has the red rubber seal making it an original. I can send pictures also when they ask for them.

Cheers

[Terry M.]

Re: 72 L48 oil filter reproduction

Terry, I have mine from my 2006. It has the red rubber seal making it an original. I can send pictures also when they ask for them.

Cheers

My 2008 has a black gasket (IIRC) but the label and a strange colored pen mark are unique. My guess is there is some document that told dealer personel what these differences were, but I have yet to see it. Pete Bergman is doing the C6 manual(s). I'll message him.

[Joe L.]

Re: 72 L48 oil filter reproduction

Terry, I have mine from my 2006. It has the red rubber seal making it an original. I can send pictures also when they ask for them.

Cheers

Harry-------


Can you post a photo of this filter? The only filters I know that have a red gasket (actually, it's a red teflon coating over a black gasket) are the ACDelco UPF series filters. However, I was not aware that these were ever used in PRODUCTION. The original UPF series SERVICE filter for your application was UPF-44 aka GM #25329389.

By the way, the UPF series, synthetic media filters remain available for some applications including yours (now UPF-46R) but they no longer have the red teflon coated gasket.

[Harry S.]

Re: 72 L48 oil filter reproduction

Here ya go..............

I'm the only one that has ever changed the oil on this car. My understanding was, if there was an engine failure, the dealership would pull the filter to see if the oil had been changed. If they found the red rubber, the warranty had a problem.

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IMG_1411.JPG

[Joe L.]

Re: 72 L48 oil filter reproduction

Here ya go..............

I'm the only one that has ever changed the oil on this car. My understanding was, if there was an engine failure, the dealership would pull the filter to see if the oil had been changed. If they found the red rubber, the warranty had a problem.

[ATTACH=CONFIG]100617[/ATTACH]

[ATTACH=CONFIG]100618[/ATTACH]

Harry-----



Well, if a red teflon coated gasket was how the dealerships determined if an engine never had its filter replaced, then it's a good thing that I never needed any engine warranty work. All of my cars have had such filters installed for the last 28+ years. I have used only the UPF series ACDelco filters all during that time. I have a lifetime supply of all of these. The UPF series filters are still available but no longer have the red teflon-coated gasket.


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