1973 Oil pressure line L82

[Charles P.]

What would be the correct/preferred Oil pressure line for a 1973 L-82 (ie copper coated steel or plastic)?

I have seen both in use.

Also any tricks to routing these through the firewall that would make it easier? Do they need thread tape?

[Joe L.]

Re: 1973 Oil pressure line L82

What would be the correct/preferred Oil pressure line for a 1973 L-82 (ie copper coated steel or plastic)?

I have seen both in use.

Also any tricks to routing these through the firewall that would make it easier? Do they need thread tape?

Charles------


The original oil pressure line was NYLON (plastic).

I have found this line to be rather easily routed through the firewall grommet. However, the hole in the grommet may have to be enlarged if the line you use has a "non-removable" tubing nut. If you enlarge the hole, you can get the line through with the tubing nut. Then,if you wish, use RTV to seal the enlarged hole. This is much easier than trying to remove and replace the grommet and, done carefully, no one will ever know the difference.

No teflon tape is necessary on these threads. If it leaks without teflon tape, it will leak with teflon tape.

[Charles P.]

Re: 1973 Oil pressure line L82

Joe ---thanks. My AIM showed part number 3909521 which some resources have as copper plated steel and some aftermarket suppliers show as nylon. I will go with the nylon --it is much more friendly to bends anyway. I have a copper line in place now and may just tape it to that and pull it through. Do you think that will work??

[Joe L.]

Re: 1973 Oil pressure line L82

Joe ---thanks. My AIM showed part number 3909521 which some resources have as copper plated steel and some aftermarket suppliers show as nylon. I will go with the nylon --it is much more friendly to bends anyway. I have a copper line in place now and may just tape it to that and pull it through. Do you think that will work??

Charles------


I don't know if you'll be able to pull it through, or not. If you can pull just the line through with no fittings or tubing nut installed on it, I think it will work. If the tubing nut/fitting has been pre-installed on the line, I don't think there will be enough room to pull it through the grommet.

My 1969 small block originally used a nylon oil pressure gauge line. As far as I know, the nylon line was used through 1973, the last year that a mechanical type oil pressure gauge was used on a Corvette.

[Harmon C.]

Re: 1973 Oil pressure line L82

The original lines I have seen on 73's were black nylon. Many vendors sell a white or clear line.

[Steve L.]

Re: 1973 Oil pressure line L82

My 73 20142 is black nylon