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Old 04-12-2017, 04:53 PM   #1
terry b
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Oil pressure line

Is the OEM oil line from the block to the oil pressure gage in the dash steel? 1972 402.
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Old 04-12-2017, 05:12 PM   #2
BILT4ME
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Re: Oil pressure line

Usually 1/8" OD soft copper.
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Old 04-12-2017, 05:13 PM   #3
hayhauler71
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Re: Oil pressure line

Mine was 1/8 inch steel on my 350. Replaced with copper.
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Old 04-12-2017, 05:26 PM   #4
GASoline71
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Re: Oil pressure line

My OEM was steel that had a rubber sleeve over it. It rusted out and ruptured, so I replaced it with copper line.

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Old 04-12-2017, 05:26 PM   #5
El Dorado Jim
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Re: Oil pressure line

steel from the factory....
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Old 04-12-2017, 06:15 PM   #6
davepl
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Re: Oil pressure line

For what it's worth, I think copper is probably safe, but it does work harden. If you have it in a an area where it'll get repeatedly bent or flexed, it'll fail eventually. Imagine if you had a oil pressure gauge on your hood, for example, and every time you opened the hood it'd flex it.

Mild steel is much more resistant to work hardening than copper, which is maybe why the factory went that way.
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