Oil Filter Canister Nut

[Joe C.]

Is this nut painted semigloss black like the canister.
If not, then what is its finish.
Thanks in advance.

[Joe R.]

Re: Oil Filter Canister Nut

Joe,

I believe the BOLT was installed after the canister was painted. It's a natural finish and usually an AP bolt. There is a company in Back-Order Michigan that cad plates that bolt incorrectly.

JR

[Larry M.]

Re: Oil Filter Canister Nut

Joe and Joe Ray:

Besides AP, I also believe that M was a typical headmark. Agree that bolt head is not painted.

Ken Hansen at OrinDales does excellent restoration and silkscreening. Better than new. Believe Paragon also restores and silkscreens.

Some folks use the decal, and then topcoat with a satin clear to seal.

Larry

[Joe R.]

Re: Oil Filter Canister Nut

Joe and Joe Ray:

Besides AP, I also believe that M was a typical headmark. Agree that bolt head is not painted.

Ken Hansen at OrinDales does excellent restoration and silkscreening. Better than new. Believe Paragon also restores and silkscreens.

Some folks use the decal, and then topcoat with a satin clear to seal.

Larry

Larry,

I didn't mean AP was the only headstamp. It was just a typical headstamp. Like you said, I have seen plenty of M's.

Thanks for the update and yes, Ken Hansen does an excellent job and doesn't plate the bolt.

JR

[Joe L.]

Re: Oil Filter Canister Nut

I think that the reason that GM chose not to plate or phosphate this bolt is that they figured there would be enough oil leakage to keep it forever rust free even though natural steel. In an era when their engines leaked oil from EVERYWHERE, this would have been a reasonable line of thinking.

[Philip C.]

Re: Oil Filter Canister Nut

AP and M bolts I remember one was used on big block motors and the other was used on small block motors, cant remember where I read that, may be Joe or Wayne may know. Phil 8063

[Joe R.]

Re: Oil Filter Canister Nut

I think that the reason that GM chose not to plate or phosphate this bolt is that they figured there would be enough oil leakage to keep it forever rust free even though natural steel. In an era when their engines leaked oil from EVERYWHERE, this would have been a reasonable line of thinking.

Joe,

I guess that would be the days before "silly-cone".

JR

[Joe R.]

Re: Oil Filter Canister Nut

AP and M bolts I remember one was used on big block motors and the other was used on small block motors, cant remember where I read that, may be Joe or Wayne may know. Phil 8063

Philip,

That doesn't seem reasonable to me since the canisters were all made by one company and shipped to either Flint or Tonawanda. Don't think they would seperate the canister's by bolt manufacturer do you?

Matter of fact, that sounds too anal for even a nit-picker judge!

JR

[Alan D.]

Re: Oil Filter Canister Nut

Have an Oil Canister Bolt without any head marking just an 1/8 recess dimple.
And do believe it's original to car.

[Don G.]

Re: Oil Filter Canister Nut

In 1960, I was a production supervisor assigned to the oil filter canister manufacturing process. The sequence was as follows:

• The canister was blanked and drawn in a 600 ton transfer press
• The sealing edge was machined on an automatic lathe
• The reinforcing ring was then welded to the canister
• The canister went through a washer and dryer.
• The canister was then placed on a monorail hanger that carried it through an electrostatic paint booth where it was painted black
• The canister was then transferred to a semi-automatic turn table where the bolt, spring and washer were assembled and staked.
• The assembly then passed through a machine that silk-screened the information on the canister with white ink.
• The assembly was then inspected and the oil filter element installed
• The assembly was then packed in cartons, placed on a wooden pallet, banded and shipped.

[Joe L.]

Re: Oil Filter Canister Nut

In 1960, I was a production supervisor assigned to the oil filter canister manufacturing process. The sequence was as follows:

• The canister was blanked and drawn in a 600 ton transfer press
• The sealing edge was machined on an automatic lathe
• The reinforcing ring was then welded to the canister
• The canister went through a washer and dryer.
• The canister was then placed on a monorail hanger that carried it through an electrostatic paint booth where it was painted black
• The canister was then transferred to a semi-automatic turn table where the bolt, spring and washer were assembled and staked.
• The assembly then passed through a machine that silk-screened the information on the canister with white ink.
• The assembly was then inspected and the oil filter element installed
• The assembly was then packed in cartons, placed on a wooden pallet, banded and shipped.

Don------


Great information! I'll bet they were making a LOT of these canisters in 1960 (and, right through to 1967).

Was there more than one manufacturing location?

[Don G.]

Re: Oil Filter Canister Nut

Joe

The canister assembly was only produced at the Harriet St. plant (Plant#3) of AC Spark Plug Division. Production volumes began to decrease in the mid-60's as GM began to introduce the spin on type( PF-12. 29, 25,etc). The plant was torn down in the mid-70's. As a side note, retirees from this plant still have an annual reunion with about 75 or more people attending! As you know,the Corvette application changed to the spin-on design in 1968 with the PF29 followed by the PF-25 during the 1969 model year.

Don

[Wayne M.]

Re: Oil Filter Canister Nut

.... the canisters were all made by one company and shipped to either Flint or Tonawanda. ....

Joe -- when the AIM ('65 for instance, UPC 6, Sheet B2, base engine) shows the oil filter assembly given a part # and a bolt torque, doesn't this mean they were installed at St. Louis ? The L78 section UPC 6 cover sheet doesn't mention anything about the filter on Sheet A2 [components listed below are * assembled as indicated], so inconclusive for the Tonawanda engines.

[Joe R.]

Re: Oil Filter Canister Nut

If they were installed at St. Louis, do you think the installer would be checking the head bolt stamp on the canisters before installing them on the engine?

Don't forget the engines were started on natural gas at Flint and Tonawanda after they were assembled. That means they had to have oil and something in place for the oil canister.

Really doesn't matter where they (the canisters) were installed. They would not be (the canisters) selected by head bolt stamp to go on a certain engine, big or small block.

JR

[Joe C.]

Re: Oil Filter Canister Nut

You know what.
You guys are not as sharp as you used to be.
I'm surprised that nobody didn't correct me, because it ain't a goddam nut................it's a friggin' bolt.