SS oil pump line

[survyor2]

My apologies for starting a new thread about this but I wanted to ask some questions about my particular setup and keep it separate from the other stainless steel braid oil pump line discussions.

I got the original idea from this thread:

http://www.supramania.com/forums/showthread.php?t=31378

It sounded like a great idea so I did this as you can see from the below pictures. When I posted my results on SF I got a whole bunch of crap about how the rubber line would become gummy. I'm just not buying this. I want a second opinion. How can oil deteriorate rubber rated to carry fuel and oil. And oil is the less corrosive of the two. Lots of lines out there have oil in them 100% of the time like hydraulic lines. And just because oil is on the outside and inside shouldn't make a difference either.

And just to be 100% sure of this I have a plan. I have a 2 inch piece of the hose left over. I'm just going to put it in a cup of oil for however long the SS line is in my engine. I'll check the condition of the 2 inch sample every few months. I would think they would react the same although the sample will never be under pressure or heat. But the issue we are talking about here is chemical.

Yes, I realize there is a hard line being made but I'm not convinced there is anything wrong with my setup.

 

[lagged]

while replacing that hardline and banjo bolts with something that flows better is a good idea, using that braided SS line in my opinion is not a good idea.

braided ss line needs to be inspected every so often and eventually replaced. you dont want to put an item like that INSIDE your engine.

 

[starscream5000]

Especially if for some reason an unknown object starts touching the line and rubbing/chafing it, causing the metal to flake/fall off into the oil pan... Ouch.

 

[supra90turbo]

Fuck I want a Starion/Conquest.... they're always so clean. That blue is my favorite color.... sorry for the OT, lol..

More info on this hardline please?

 

[bowsercake]

http://www.supramania.com/forums/showpost.php?p=535487&postcount=112

 

[Enraged]

OT: I love your engine. its pretty.

 

[survyor2]

Especially if for some reason an unknown object starts touching the line and rubbing/chafing it, causing the metal to flake/fall off into the oil pan... Ouch.

I just don't see how that could happen. Its inside the motor so there are only 2 things close to it...the bottom of the oil pan and the pickup tube. There isn't any way possible the bottom of the pan could come into contact with it. And the pickup tube would have to blend way too much to contact it. If anything else is rubbing up against it, then you have bigger problems. Even if something did rub against it, something could rub against a hard line and just as well flake metal off of the hard line.

 

[lagged]

I just don't see how that could happen. Its inside the motor so there are only 2 things close to it...the bottom of the oil pan and the pickup tube. There isn't any way possible the bottom of the pan could come into contact with it. And the pickup tube would have to blend way too much to contact it. If anything else is rubbing up against it, then you have bigger problems. Even if something did rub against it, something could rub against a hard line and just as well flake metal off of the hard line.

agreed, there is no chance of anything chaffing against the line however my original argument against the stainless steel braid still stands.

its an item that needs to be inspected periodically and when its inside the motor you simply cant do that. its not a good idea.

 

[starscream5000]

Care to pull you entire motor or drop you subframe while having the engine jacked up just to make sure the ss line is ok?

 

[williamb82]

why would it need inspected? the braid cant unravel, its locked in the hose ends, the rubber wont deteriorate as it isnt rubber. usually a chemically resistant synthetic. and nothing is touching the ss braiding to cause it to chafe or otherwise fray. people just worry too much. i have spoken with the local hydralic hose shop, those guys have used this stuff for years and are experts imho. they didnt even hesitate to tell me it will work fine. the hose is good to 1250 psi and 300deg. if your oil is getting over 300deg or your oil pressure is over 1250psi, you have some other serious issues. think about your ss braided brake lines. how often have you seen one of those fail unless it was rubbing on something? ive never seen one fail or heard of one failing, even when rubbing on something, and brake fluid is far more corrosive and gets far hotter then the oil.

 

[lagged]

eh aeroquip even recommends inspecting the lines every so often. its not that the hose that might burst or leak, its where the hose meets the fitting that is the weak point.

personally id rather not take the chance.

 

[Mr.PFloyd]

idealsupra ran this for 2+ years no problems didn't he?

 

[3p141592654]

Take a look at the condition of your rubber hoses that come in contact with the crankcase vapors, these are the PCV hoses and the vent tube behind the alternator from the crankcase to the head. Chances are they are rock hard and starting to split unless you replaced them in the last year.

These hoses deteriorate very fast. The reason is that the combination of high temperatures and exposure to reactive blowby vapors is brutal on rubber. The only material that will withstand that sort of environment for any length of time is Viton, and the cost of a Viton hose of that size and pressure rating will be way higher than buying Arz's metal oil tube kit.

http://www.supramania.com/forums/showthread.php?t=31378

 

[Idealsupra]

idealsupra ran this for 2+ years no problems didn't he?

yes and am STILL running it.

the pics in that thread of of MY block....i was one of the first if not THE first to do this... (at least documented). and i am STILL running it.

EVERYONE who hasnt run this type of line in their car sit down..... ok now that EVERYONE who has said something negative about this line is SITTING... the FACT is there is NOTHING wrong with putting this line in the block. it doesnt hit anything...it doesnt move...it doesnt expand or contract, it doesnt put ss shards in your block and oil and bearings (all this assuming you put the line together properly obviously).

the mod is PERFECTLY fine. and there are ZERO ill affects and great benefits in flow.

THE END.

 

[bowsercake]

By the way IdealSupra takes Turn 9 of Willow Springs I'd believe anything that he says about SS lines in the oil pan.

 

[lagged]

ehhhh....... the point is that stainless steel braided lines require periodic inspection...before i sold my supra i had ss braided fuel lines and i didnt worry much about them, but they were easy to inspect and pressure test just to be sure nothing was wrong. the point is, in this application it is impossible to check on the line to make sure there are no problems.

 

[3p141592654]

Do what you want, but its a ticking time bomb. Name any production motor with rubber hoses inside the crankcase?

 

[lagged]

Do what you want, but its a ticking time bomb. Name any production motor with rubber hoses inside the crankcase?

agreed!

just because some people have done something that works for a while dosnt mean its a good idea.

another thing that hasnt been mentioned, there really is NO problem with the 7m oiling system EXCEPT for the oil cooler/filter bracket.

remove that and youve solved all the 7m oiling issues.

 

[jdub]

I saw this mod when I was building my motor...decided against it for the reasons above. If this line fails (for any reason), the party is over pretty quick. If I were to do it over, I would use the hardline ARZ has come up with for a bit more volume. It would work well with a shimmed relief valve.