oil pool
Thread Starter
Instructor
Joined: Apr 2013
Posts: 159
Likes: 0
From: Austin, TX
oil pool
I plan to do an intake refresh as a winter project, but while doing the TB/WP i noticed a pool of oil (pics). I'm pretty sure no coolant came out when i removed the upper rad hose, so i think it's all or mostly oil. Where is it coming from and is the fix pretty straight forward?
1st Gear
Joined: Oct 2011
Posts: 1
Likes: 0
You have the plastic oil fill neck which is notorious for leaking at its base. Being plastic it can become distorted and fail to seal effectively. They are made from three separate pieces so It could also be leaking from the join seams on the neck itself. Its a disappointing design and not consistent with Porsche quality. The S3 has a nice alloy neck which would be a worthwhile swap if you can get your hands on one.
Rennlist Member
Joined: May 2002
Posts: 9,298
Likes: 1,332
From: Roswell, GA
You have the plastic oil fill neck which is notorious for leaking at its base. Being plastic it can become distorted and fail to seal effectively. They are made from three separate pieces so It could also be leaking from the join seams on the neck itself. Its a disappointing design and not consistent with Porsche quality. The S3 has a nice alloy neck which would be a worthwhile swap if you can get your hands on one.
Thread Starter
Instructor
Joined: Apr 2013
Posts: 159
Likes: 0
From: Austin, TX
You have the plastic oil fill neck which is notorious for leaking at its base. Being plastic it can become distorted and fail to seal effectively. They are made from three separate pieces so It could also be leaking from the join seams on the neck itself. Its a disappointing design and not consistent with Porsche quality. The S3 has a nice alloy neck which would be a worthwhile swap if you can get your hands on one.
Rennlist Member
Joined: Jul 2006
Posts: 5,424
Likes: 630
From: Bloomfield, MI
As long as the plastic one is not cracked, when replacing it use a bead of silicone sealant one that is good for oil and heat.
The filler neck is only held on by two long 10mm bolts that can not be torqued down too much else you will break something, hence the need for the sealant.
Yes the S3 part will fit, that is why it was suggested, but they will leak too if not sealed the same way.
Dave
The filler neck is only held on by two long 10mm bolts that can not be torqued down too much else you will break something, hence the need for the sealant.
Yes the S3 part will fit, that is why it was suggested, but they will leak too if not sealed the same way.
Dave
Rennlist Member
Joined: May 2002
Posts: 9,298
Likes: 1,332
From: Roswell, GA
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Stunning Porsche 356A Super GT Speedster Auction Fails to Meet Reserve
Verdad Gallardo
Every Era of 911 Owner Explained in One Sentence
Verdad Gallardo
Thinking of Buying a Porsche? Do These 10 Things First
Joe Kucinski
Pixar Pals Turned Into 1-of-1 Porsches!
Michael S. Palmer
Theon Goes Full Carbon Fiber With Stunning New Build
Verdad Gallardo
Genius Porsche-Themed Gifts That'll Make Any Dad or Grad Smile
Joe Kucinski
10 Used Porsches Are Selling for Way Too Cheap
Joe Kucinski
Tuner Is Converting Porsche 911s Into Shooting Brakes
Verdad Gallardo
This Coachbuilt Creation Is A Modern Take on the Legendary Porsche 917
Verdad Gallardo
Rennlist Member
Joined: Oct 2006
Posts: 1,592
Likes: 48
From: Porterville, Ca.
My '86.5 had the same problem kaelix. For some unknown reason a previous owner had changed the original fill neck for one from an '87 (or newer). This pos had split along the seam and continually filled the area just behind. Also if not done recently expect to change some of the hoses as they will be hard.
Three Wheelin'
Joined: Apr 2007
Posts: 1,306
Likes: 2
From: Bellevue, WA
I took the opportunity to also install an oil baffle from 928 Intl during my intake R&R. Tom can source the right gaskets as well. I used Yamabond sealant, pre S4 gasket, baffle, S4 o-ring gasket with silicone lube. No leaks going on a year. Well documented...search is your friend.
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Jul 2007
Posts: 4,539
Likes: 4
From: Germany
Also a good opportunity to change the large o-ring on the coolant bridge, that recess in your picture probably also holds leaked out coolant. Then of course also change out all other coolant bridge seals.
Team Owner
Joined: May 2004
Posts: 31,337
Likes: 4,290
From: Philly PA
for the sealant to use on the oil fill tube,
I suggest Hondabond 4 ,
this is found at your local Honda bike dealer.
NOTE 928 INTL sells a oil fill tube block off plate,
this will reduce the amount of oil that is thrown at the oil fill tube
I suggest Hondabond 4 ,
this is found at your local Honda bike dealer.
NOTE 928 INTL sells a oil fill tube block off plate,
this will reduce the amount of oil that is thrown at the oil fill tube
Rennlist Member
Joined: Jul 2002
Posts: 3,269
Likes: 5
From: Deep in the Heart of Texas!
All good info ... the metal S3 may also have a different breather hose configuration and so you may need to make some modifications to either close off or add another connection point.
I put a new plastic one on my car a few years back and wish now I had found (and modified) a metal one instead
I put a new plastic one on my car a few years back and wish now I had found (and modified) a metal one instead
Archive Gatekeeper
Rennlist Member
Rennlist Member
Joined: Sep 2002
Posts: 18,872
Likes: 4,091
From: Irvine, CA