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Engine oil line for 930s?

I'm in the process of addressing leaks and my oil lines are suspect. Now may be a good time to migrate to the earlier engine oil line I've heard about but don't know more than that about.
My engine has a hard line (#18) that goes from the bottom of the case up, up near the turbo flange, and then over to (#9) a combination rubber/hard-pipe line that runs up to a thermostat in front of the passenger wheel. This line came VERY close to my headers, as in within paper-width.
The other line (#10) that goes from the oil reservoir to the same thermostat in the passenger wheel well also looks like it's time has come as well.

What is the earlier turbo oil line(s) that I should get that are routed differently and might buy me some header clearance?


Porsche oil lines 1 by Ken Brown, on Flickr
Porsche oil lines 2 by Ken Brown, on Flickr
Porsche oil lines 3 by Ken Brown, on Flickr

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Ken
1986 930, 1969 Mach1, 2003 540 Sport, 2016 R1200RS

Last edited by gsxrken; 04-04-2020 at 10:18 AM..
Old 04-04-2020, 10:12 AM
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This is what I ordered to install Headers on my 86, I know you need "739", not 100% sure about the other two, I just replaced all of them including the rubber hose from cooler to tank just to freshen up the lines and reduce leaks....

930-107-336-03-M127
911-107-739-10-M127
911-107-729-10-M127
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Tim
1986 930
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Last edited by timc; 04-04-2020 at 05:38 PM..
Old 04-04-2020, 05:21 PM
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Thanks Tim! Any pictures of your new lines so I can visualize the new routing?
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Ken
1986 930, 1969 Mach1, 2003 540 Sport, 2016 R1200RS
Old 04-05-2020, 06:45 PM
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Just came across this and would like to see these early Oil Lines if anyone has photos.

Always looking for new items to make or Re-Hose, as if I don't have enough to do with 911 Fuel Lines.

Happy to help keep these wonderful cars on the road for generations to come.

Have a great "Porsche Day" you all.

Len

Old 09-10-2020, 08:34 AM
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Note: the steel crossunder line is "OEM" and frequently they don't fit well, if at all. They hit the lower forward edge of the crankcase close to the bellhousing.







If someone isn't stuck on using OEM lines, we use a 1-piece stainless/Teflon hose assembly from the case to the thermostat.
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Old 09-10-2020, 05:50 PM
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Thank you Chris.

This looks like the one that sometimes "Kinks" if it's not the correct Hose Length...



Can you show us the Stainless/Teflon hose assy you are using as a substitute?

Len

Old 09-11-2020, 07:37 AM
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Len,
That hose can kink, yes, for 2 reasons:
1) there's 2 different lengths depending if it is a 911- or 930- part number hose assembly
2) they're "OEM" assemblies -- and these days, that hardly guarantees they're made correctly or to the original spec. Sucks, but that's the reality. Quality isn't what it used to be.

Here's the SS/PTFE hose in use:

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Old 09-11-2020, 10:06 AM
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Still amazed how much info on these cars you have in your head ��. If I go to a hydroshop locally how long do you find is good for that under the box routing. Mine is custom over the box and its leaking and has too many fittings.
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Old 09-11-2020, 10:17 PM
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wow Len / Chris - you guys rule as usual!

Ken, didn't know was possible to run the original line when moving to headers. Huh.

Yes, my OEM under-line has the (slight) 'kink' issue by the right wheel... dumb. Chris, mebbe have a look there, doubt led to my starvation issue but worth a peeksee?
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Old 09-14-2020, 06:44 AM
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Wondering if the offset of these Lines is the reason that one of them interferes with the lower crankcase next to the bell housing.



Thought this had to do with the Smog Pump Spider Lines to the heads.

Hope someone can explain.

Learning every day about these wonderful cars.

Len

Old 09-19-2020, 07:24 AM
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Quote:
Originally Posted by BoxsterGT View Post
Wondering if the offset of these Lines is the reason that one of them interferes with the lower crankcase next to the bell housing.
Look at the distance between the two 90deg bends that make up the "U" off the case. Those two pipes aren't identical; one is wider than the other.
We've also seen the 2nd bend be <90deg so the crossunder section isn't parallel with the engine.
Manufacturing tolerances are inconsistent.

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Old 09-20-2020, 02:00 PM
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