plastic line can be used ,for both o/p and f/p fuel does not affect the line in my opinion however steel or copper line is will not melt if it is contacted on hot surface ,therefor in my opinion hardline steel/copper is the better meterial to use for the gauges .
Oh, I see what you did there - the way you had that one post worded I for some reason understood it as "only use copper. steel, or steel-braded plastic line, is junk for pressure" which didn't make much sense to me. Whereas what you meant was "only use copper, steel, or steel-braded. plastic line is junk for pressure". So punctuation aside, we all agree that running the bare plastic line most gauges come w/ is a bad idea, and that either a hard line or stainless steel jacketed soft line, or some combination of both, are the way to go.
gatorman21218 said:
You have to be careful with copper though. the vibration can cause fatigue cracks. My oil pressure line went out shortly after the rebuild. luckily i found it when I did cuz i lost lost about 2 qts in 30 seconds
Aye, I'll use 3/16" brake line and sections of 100psi hose well before I run copper on a diesel-powered vehicle...
