have some 5/8" silicone hose laying around wondering if i can use that as an oil return? i have a bunch of this ----!!

 

I would at least use braided rubber high pressure hoses.

 

So would I. I just ran across a guy that had a small kink when his engine rocked using 3/4" silicon hose. It burst.
On a different Toyota v6, there is a rubber crossover for coolant on the block. I knew a guy that used high-temp silicon for that. It burst too.

Leave silicon hose for something like a vacuum line. if there's going to be any chance of it holding pressure... Forget it.

 

I used high press fuel line and it works great

 

oil return doesn't have any pressure, it's gravity fed. i have used the same piece of silicone/neoprene/rubber high temp hydrualic hose for 3 years. it is also high pressure, but you don't need high pressure...just something to handle the extreme temp and corrosiveness of near boiling oil.

i would stay away from flimsy straight silicone type hose. i don't think it can handle that much temperature.

 

wel i looked at it closer, i should post pics! its heater hose, but its blue instead of the plain black..
also has the thread or w/e in it just like fuel line hose does

 

i have a 1in o/d and 5/8 in i/d hi temp silicone hose thats blue on the outside and orange on the inside (if thats what you're talking about) for the oil return....i dont forsee a problem with as there isnt really any pressure as its gravity fed like scttydb411 said, but im a noob.....

 

I prefer high pressure hoses only because they seems to hold up better on the long run.

 

i use 3/4" id black goodyear high pressure rubber efi hose, works really well, as for bursting, just leave a bit of extra length when ye connect it up

 

meh, i just use heater hose