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Oil Tank Line Leak
Just put a brand new oil line that goes from the oil tank to the thermostat. It is now leaking when the car is running. I tightened it a bit more and still leaking. It's as tight as it's going to be. The brand of the line is German. Any experience with these lines and how to fix the leak? Frustrating that a brand new line doesn't work.
 
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2007 GT3 RS Orange/Black 1986 911 Carrera White (dedicated race car #23) |
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05-19-2018, 12:49 PM
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Under the radar
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
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If there is some dirt or a nick on either of the mating surfaces in the fitting, you will get a leak.
You might try using a little Curl-T.
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Gordon ___________________________________ '71 911 Coupe 3,0L outlawed #56 PCA Redwood Region, GGR, NASA, Speed SF Trackrash's Garage :: My Garage |
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05-19-2018, 06:49 PM
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When you installed it did you insure it was properly seated and torqued to spec?
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05-19-2018, 07:45 PM
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yes it was cleaned thoroughly and tried to keep it pressed properly while tightening. As far as torque, tightened it by hand (no extension to the open ended wrench), tight first, it was leaking, then tighter, still leaking. Tightened it some more till i couldn't anymore.Couldn't use a torque wrench nor do i know the proper torque for it.
Curil-T - would there be any concern of the sealant getting in the oil? i get it's only a little just cautious using foreign materials where they don't belong.
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2007 GT3 RS Orange/Black 1986 911 Carrera White (dedicated race car #23) Last edited by speeds5; 05-20-2018 at 04:56 AM.. |
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05-20-2018, 04:51 AM
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I had a leak on one of those lines, it turned out what was going on was the line was not free to fully mate while the nut was threaded and tightened and it would bind seemed tight but it was not fully sealed.
I fixed it by loosening the nut and then taking all of the mounts for the line to the body free so the line would not be under any stress. Re- tightened the nut - it went a whole turn or more farther than before and no leak. That said yours looks fully seated. The worst thing is all the oil has to come back out...arrgh. I would pull that fitting back apart and look at the mating surfaces as mentioned above. If its leaking it can ONLY be two or three things. - There is a nick in the sealing surface - its not tight so oil can get by the seating surface - the two seating surfaces have different angles so they wont mate and seal (wrong part) Looking at it again. Is it possible there is a crack in the 50 year old oil tank or the weld right there? maybe go crazy and pull the tank out and clean the heck out of it and have a look.
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erik.lombard@gmail.com 1994 Lotus Esprit S4 - interesting! 84 lime green back date (LWB 911R) SOLD  RSR look hot rod, based on 75' SOLD 73 911t 3.0SC Hot rod Gulf Blue - Sold. |
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05-20-2018, 05:42 AM
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I was thinking of replacing that same line. Did you have much problem taking it off at the thermostat? I've seen that some need to cut and chisel the connector off...
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05-20-2018, 06:32 AM
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No didn’t have any issues taking the old off. The more I think about it, the more I think these new aftermarket parts don’t have the same exact mating surface. Will take it off one more time and see how it goes
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2007 GT3 RS Orange/Black 1986 911 Carrera White (dedicated race car #23) |
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05-20-2018, 08:15 AM
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speeds5..yes you hit the nail on the head..the fitting do not match...
Ivan
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05-20-2018, 08:20 AM
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Quote:
OP, when you remove it, take a close look at the mating surfaces.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-20-2018, 08:25 AM
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It’s really a shame that thy sell these as OEM replacement and the quality is sub par. Just looked at the reviews on the Pelican product page and it looks like two other people had the same issue. I was comparing the old original line to the new one and the nut is different. I wouldn’t be surprised if the flare is different as well although I can’t confirm it without tearing both apart.
Quote:
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2007 GT3 RS Orange/Black 1986 911 Carrera White (dedicated race car #23) |
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05-20-2018, 08:54 AM
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That’s the plan. Second time I took it off didn’t notice anything and it looked clean. I’m going to take it off a third time tonight and inspect it in more detail. If it doesn’t work after that maybe go for the Porsche brand line
Quote:
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05-20-2018, 08:57 AM
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Put a Porsche OEM line in today. Leak is 99% gone. Seems like a very very very slow seepage. Just basically getting the part between the nut and the tank wet after a drive, not even going down the nut/tank. No drops which is a huge improvement. Maybe need to tighten it a bit more but didn’t want to put too much torque on it. I’m happy with the result
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2007 GT3 RS Orange/Black 1986 911 Carrera White (dedicated race car #23) |
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05-26-2018, 06:41 AM
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