Oil Pressure Line
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Oil Pressure Line
I would like to upgrade my oil pressure line with AN fittings for my 73 small block. I found one to fit the block, but not the back of the original guage. Has anyone done this? PS had fun cleaning up a nice puddle of oil on my new carpet. 
Race Director
Joined: May 2006
Posts: 18,737
Likes: 2,583
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Oil pressure line
how about this kit
http://www.mamotorworks.com/Corvette...e-kit-614370-1
http://www.mamotorworks.com/Corvette...e-kit-614370-1
Le Mans Master
Joined: May 2003
Posts: 8,877
Likes: 3,556
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
I converted mine to AN-4. The guys at NAPA just let me go back and look through all their fitting draws. Then used a 1/8 NPT coupler between the AN fittiing and the gauge fitting. I'm running a Dry Sump and external oil filter housing and wanted the look of stock gauges...
$17 cheapo oil pressure gauge to check
DSCN3025 by richardhayes454, on Flickr
$17 cheapo oil pressure gauge to check
DSCN3025 by richardhayes454, on Flickr
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
The fitting in the back of the gauge is a compression fitting- but it's NOT a hardware store compression fitting. If you look carefully at the picture MelWff posted you can see the ferrule is not a round "ball" but it's a tapered cone with a ring. the two are not interchangeable unless you like leaks.
For the record, I'm not a real big fan of using copper for the oil pressure line. Vibration work hardens the copper and it can crack. Been there. It may be that Autometer uses a different alloy copper and it lasts longer.
For the record, I'm not a real big fan of using copper for the oil pressure line. Vibration work hardens the copper and it can crack. Been there. It may be that Autometer uses a different alloy copper and it lasts longer.
Team Owner
Joined: Sep 2006
Posts: 31,280
Likes: 4,372
From: Westminster Maryland
Hi Tim,
The reason you mention about the possible problem with copper line is, I believe, why at least some original sb cars had black nylon lines.
On cars where there copper line was used wasn't there a 'loop' left in the line to alter the vibration that hardens and then cracks the line?
Regards,
Alan
The reason you mention about the possible problem with copper line is, I believe, why at least some original sb cars had black nylon lines.
On cars where there copper line was used wasn't there a 'loop' left in the line to alter the vibration that hardens and then cracks the line?
Regards,
Alan
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
copper will fatigue and crack from vibration, I highly suggest using 1/8" stainless line.
it will last forever, don't forget to put a loop in the line to minimize vibration.
good luck.
it will last forever, don't forget to put a loop in the line to minimize vibration.
good luck.
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