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Paul_WNC #1166915 Wed May 25 2016 01:47 PM
Joined: Jan 2016
Posts: 640
Just finished a GMC 228 oil line redo.
The stock 3 way fitting out of the front block in my case made for an interesting project. This three way goes to the head oiling , oil filter and pressure gauge.

The thread mix, fitting mix and transions in sizing in the stock pipe and then the vibration isolation rubber lines makes it challenging.

There are inverted flare fittings and transition fitting to rubber lines in the stock setup that are no longer available. I used a cobination of brake line, a rubber line and flare to get the job done. The filter threaded fitting themselves were different on the GMC from the Chev.

Found a same transition problem on the oil pressure gauge line at the fire wall. Stock is 3/16" pipe to an inverted flare to rubber line to 1/8" line to the gauge. Replaced with vibration loop with compression fittings and a coupling with 3/16" to 1/8".

[URL=]pic of filter oil line[/url]

Last edited by showkey; Wed May 25 2016 01:59 PM.
Paul_WNC #1167128 Fri May 27 2016 01:08 AM
Joined: Jul 2015
Posts: 134
Can copper tubing be used instead of brake line?

JackieC #1167135 Fri May 27 2016 02:02 AM
Joined: Sep 2001
Posts: 31,811
Bubba - Curmudgeon
Originally Posted by JackieC
Can copper tubing be used instead of brake line?

Yes - it might be preferred.
Copper-Nickel tubing would also work nicely.

Tim []
1954 3106 Carryall Suburban [] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. []
Paul_WNC #1167146 Fri May 27 2016 03:13 AM
Joined: Feb 2004
Posts: 26,957
Kettle Custodian (pot stirrer)
Soft copper has a nasty habit of cracking at flare fittings if it's not double-flared. The cupro-nickel tubing would be a better choice, since it's suitable for medium-pressure applications like hydraulic brakes.

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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Paul_WNC #1190625 Sat Nov 12 2016 02:24 PM
Joined: Nov 2011
Posts: 2,720
While looking through some images, I noticed one of a topic I began a while back... Here is my solution of a hard line set up for the oil filter.


Thought a follow-up would be nice as most ask questions but rarely post solutions.

Last edited by Paul_WNC; Sat Nov 12 2016 02:27 PM.
Paul_WNC #1190670 Sat Nov 12 2016 09:45 PM
Joined: Jan 2015
Posts: 1,046
Nice work. Jeffrey

Paul_WNC #1190674 Sat Nov 12 2016 10:35 PM
Joined: May 2013
Posts: 6
New Guy
An older thread, but Folks I know have used the "grease gun lines", having ends made up at NAPA.

For me, I use hard lines, with a loop.

Regarding dealer installed oil filters vs factory installed oil filters, BOTH were done.
If the oil filter was factory installed, under RPO 237, the canister was black, the top had white lettering on it.
The dealer installed oil filters had a blue canister with an orange top.
BY 1962, the 6 Cyl had a factory installed filter, as standard equipment. It was black.

Paul_WNC #1190892 Mon Nov 14 2016 07:49 PM
Joined: Jan 2014
Posts: 3,137

I suppose you could call that "military grade" or "mil-spec" for marketing purposes. Nice work!

Did you flare your own or buy the kind that have the fittings already installed? I'm curious what size the fittings are. My rubber lines from Jim Carter are almost a bit too short.

I might do what you did but I lack the flaring tool and might just but the pre-fab line.

Paul_WNC #1191963 Tue Nov 22 2016 05:27 PM
Joined: Sep 2008
Posts: 882
Shop Shark
Very common to loop hardline. Only need on loop, although the multi loop thing looks kinda cool.

From my 1940s Cevy manual:

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