S Hose secret

[silverc4s]

My long time mechanic, was changing my oil the other day as I was nosing around. He loosens both clamps on the S hose and drains it last, after the engine & the tank are dry. He says it's good for a half to 3/4 of a quart of old oil.

Anybody else do this???

[brads911sc]

ummm... no.

[tobluforu]

What's the S hose, on my 72 after I drain the sump and the oil tank I remove the hose from the oil cooler (stock) and drain that as well?

[Wil Ferch]

Seeing that the "system" holds 13 quarts ( those systems with front oil cooler)...and that 3 quarts "stays behind" for the changeout....I'd have to ask what is the benefit of being able to drain out an additional 1/2 to 3/4 quart by doing this .. ??????

[E Sully]

Can't hurt to get rid of a little more old oil.

[James Brown]

yes that's true but you increase the chance of something bad happening if you don't properly put the hose back on or damage it. I don't think it's worth the trouble.

[Neel]

Originally Posted by James Brown

yes that's true but you increase the chance of something bad happening if you don't properly put the hose back on or damage it. I don't think it's worth the trouble.

+1 Seems to me you're asking for trouble..

[Wil Ferch]

Ok..... so 2 1/2 quarts "stays behind"....vs 3 qts staying behind, if you do this?......... agree not worth the trouble

[group911@aol.co]

Originally Posted by James Brown

yes that's true but you increase the chance of something bad happening if you don't properly put the hose back on or damage it. I don't think it's worth the trouble.

Guess you could use the same logic with the drain plugs. If it gets damaged from removal, it needed replacement anyway.
If the goal is to put as much fresh oil in the car as possible, why not. You actually only have to remove one end to do it.

[Wil Ferch]

Is this an "opportunity" question?....or is it *truly* to get as much old oil out as possible?. If it's to get as much oil out as as possible, then I'd seriously consider adding drain ports somewhere along various low points in the oil system and maybe at the front cooler, too.

Most cars inventory 4-5 quarts. Ours are like 13 quarts and we *still * ( anal bunch that we are) change out maybe every 3000 miles. What's the point? Has anyone suffered an engine failure of this type of engine in the last 40-50 years....due specfically to a bad lubrication/bad oil problem?

[James Brown]

Ya know, I looked all over the Bentley and the Hanes and the workshop manuals and I can't find that procedure anywhere. The steps for a oil change are pretty simple. I don't think I need to complicate them with non standard steps. What about draining the oil cooler and all the oil in the lines also. makes sense.

[tobluforu]

[QUOTE=James Brown;5902871]Ya know, I looked all over the Bentley and the Hanes and the workshop manuals and I can't find that procedure anywhere.
That's why it's a secret.

[E Sully]

Anal. Asking for trouble? Everyone on this forum owns a Porsche. I think that means we're all a bit anal. Bring up type of oil used. How many pages do those threads run?
His mechanic does his best to make sure he does everything possible to give him the best service. Excessive, yes. Asking for trouble? At least his mechanic knows if the S hose is in good shape. I've read a few threads where the owner didn't know what condition his S hose was in or that he even had one till he lost oil as fast as BP did.
Considering many of the threads on this forum, where every fastener and screw have been sent out and re-plated, running 93 octane in a car designed for 89, which while safe, slows combustion more than is needed and probably lowers horsepower, race suspension on street only cars, etc.
It is not complicated and the only dangerous part is if the hose is already weak, in which case your mechanic sounds like the type to notice and recommend replacing it.
I think you found a good mechanic who cares about the cars he services.

I own a Porsche, I'm a bit anal, and I'm proud.

[silverc4s]

It has been interesting to see the broad range of opinions on this very simple thread. Proves one thing: we all care a lot about our Porsches, and we think about everything we do with them.

[russell meeks]

the coolest setup ive seen is on Elephant Racing's oil lines, they have an air valve port (like on a tire) and you put an air line to it and pressurize the lines and cooler to force all of the old oil out of the oil cooler and lines going to the front. Russ

[Joe Bob]

Thanks for the reminder.

Finned Oil Lines for Porsche 911 / 930 - Elephant Racing

I'll be doing a change soon as I pick up my discounted VR1 oil from Autozone. I keep forgetting that I have that valve there. It's just under the thermostat and with the T-stat closed a blast of compressed air will pull an additional 2 quarts out of the twin coolers up front and the lines.....

Chuck Moreland thinks of everything.....

[al lkosmal]

Originally Posted by russell meeks

the coolest setup ive seen is on Elephant Racing's oil lines, they have an air valve port (like on a tire) and you put an air line to it and pressurize the lines and cooler to force all of the old oil out of the oil cooler and lines going to the front. Russ

Damn,
That is smart....I just bought a 73 with those lines on it and...I didn't know that....I'm going out to the garage and look now.

Al

[Joe Bob]

Called Chuck....he says 100psi is no problem. He also said a guy w/o air used a bicycle pump.....

[billjam]

I'm surprised that no-one has owned up to turning the engine over on the starter to pump oil out of the oil system. It will horrify some, but turning over an engine that is fully doused with oil internally isn't going to cause any damage at starter motor revs.
I have owned a lot of cars and changed a lot of oil and I ALWAYS give the engine at least ten seconds of cranking to get another litre or two out of the system, more if the oil cooler thermostat is hot and open.
On restart after adding new oil, the oil pressure rises almost instantly because the pump has fresh oil all the way up to its inlet and the engine only needs a few turns to fully charge the oil gallery again.

[Wil Ferch]

My point about "us" being anal wasn't derogatory...heck, I'm anal.....but it was meant to showcase that due to our "anality" ( LOL ! )...we change oil every 3000 miles or less even though our systems hold 2-3 TIMES as much oil as other cars.....we can go 3 x as long without oil changes when viewed as a CONTAMINATION issue.....yet we don't,.

So.....with THAT as backdrop....I was submitting the point..."fine. do this and the amount left behind is 2.5 quarts vs 3. What's the point?".

No doubt a caring mechanic.....but do the math.