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Author Topic: oil pressure line  (Read 6808 times)
Ron C.
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« on: May 11, 2007, 04:21:28 PM »

was the oil pressure line clear plastic or black? I found out that a grommet is on the firewall and not a fitting,so I need to replace the line and add the grommet.
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
1968RSZ28
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« Reply #1 on: May 11, 2007, 05:14:03 PM »

Black
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sd1968z28
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« Reply #2 on: May 11, 2007, 05:41:18 PM »

black cheese plastic, do your self a favor and bend a copper one and paint it black no one will know and it will no go bad.  the after market line is not so good!
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GaryL
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« Reply #3 on: May 11, 2007, 05:55:26 PM »

was the oil pressure line clear plastic or black? I found out that a grommet is on the firewall and not a fitting,so I need to replace the line and add the grommet.

I don't thnink the grommet is available. I had to use a 1" x say 5/16" with a 1/8" hole and glue the small one inside the large one. Could not find a 1" with a 1/8" hole.
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Gary

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zdld17
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« Reply #4 on: May 11, 2007, 06:01:55 PM »

Better yet,  do use the 1/8" copper tubing as mentioned above,  with compression fittings,  use a long enuff piece of tubing and make a one or two double loop  at the fire wall before going into interior to gauge and get enuff black  1/8 or 3/32 rubber vacumn hose to slip over the entire length of tubing to the grommet.     The loop will absorbe vibration that could cause a break in copper and rubber hose will protect and color tubing black.  Make sense?   Works for me and I didn't stay at the Holiday Inn.

As for he rubber grommet issue,  the Trifive chevy applications have such a grommet for wiper motor cable or you can go to Lowes and look thru their rubber or plastic blank plugs and fit as needed.   
« Last Edit: May 11, 2007, 06:04:27 PM by zdld17 » Logged

Don Dabbs
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« Reply #5 on: May 11, 2007, 06:39:14 PM »

My 68 AIM shows the hole to be 1/2" dia. I just went to a hardware store and found a grommet to fit.
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68Z28
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« Reply #6 on: May 11, 2007, 11:09:35 PM »

My 68 AIM shows the hole to be 1/2" dia. I just went to a hardware store and found a grommet to fit.
You are right. The hole is actually 1/2". I could not find a 1/2"x1/8" grommet.
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Gary

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JohnZ
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« Reply #7 on: May 12, 2007, 09:33:44 AM »

Copper tubing isn't a great idea for an oil pressure line - copper work-hardens with movement and vibration and fractures/cracks. Metal oil pressure lines on GM cars after about 1960 were copper-plated steel or plain steel, then changed to nylon.
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'69 Z/28
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« Reply #8 on: May 12, 2007, 10:29:05 AM »

I guess everyone's stores are different, but I went to a True Value and they have the drawers with the parts in there.  Must have had 50 different sizes.  I haven't had much luck with Lowes or Home Depot type places. I could even throw one in an envelope if you like.
« Last Edit: May 12, 2007, 03:57:39 PM by 68Zproject » Logged

68Z28
Ron C.
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« Reply #9 on: May 12, 2007, 05:49:46 PM »

Thanks everyone, I found a black plastic oil line kit and it is in and looks fine. I just didnt know if they used clear or black line. Grin
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zdld17
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dd1872
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« Reply #10 on: May 12, 2007, 06:17:50 PM »

Well, to each his own,, I would rather have a copper line instead of plasic, in event of a small fire in that area. 
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Don Dabbs
Ron C.
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« Reply #11 on: May 12, 2007, 06:31:41 PM »

here is a pic of the oil line i did.
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67Z/28,67RSZ/28,69RSZ28,71SS454CHEVELLE,02Z4C35thSSCAMAROGMMG#11PERF EDITION 500HP
KurtS
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« Reply #12 on: May 15, 2007, 11:17:17 PM »

Let's see.
One of our test vehicles burnt to the ground with a copper line for a fuel pressure guage that work hardened and broke. The fire got hot enough that it melted the wheels off the car....

And I had a test vehicle that I was driving and the oil pressure line work hardened and broke. It poured out a lot of smoke, but I got lucky and it didn't catch fire and I didn't ruin the motor (special cam / lifter test vehicle no less).

A copper line is a bad idea.....
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Kurt S
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« Reply #13 on: May 16, 2007, 12:12:36 AM »

Also to note, the run-of-the-mill compression fitting on the black plastic line wont seal the factory style sending unit and gauge.

Just for reference, this is the firewall grommet, which I don't believe is repo'd yet:







Within the last week, I came across a grommet that "appeared" to be the same on another 69, but with a different use (warning light car).  I really cant think of where it was right now, and I didnt check to see if it is the same dimensions or not.
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68Zproject
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« Reply #14 on: May 16, 2007, 12:39:42 AM »

RAD, does the 2nd picture face out?  Is that what you would see looking at the firewall, or the cone shaped end?
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68Z28
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