Replacing an Oil Pressure Switch on a 74-89 Porsche 911
A common problem on the Porsche 911's between 1974 and 1989 was the failure of the oil pressure switch. This results in oil leaking in the engine bay. This kind of oil leak is often hard to track down as the oil finds its way down the sides of the engine and onto the heat exchangers. This can often send you hunting for leaks in the wrong place and even conclude an incorrect origin for the oil leak. When ever you get an oil leak, it's always worth have a peak inside the engine bay to see if there's traces of oil. If there is, it could very well be the oil pressure switch. You'll only know for sure once you get your hands on the culprit.
Suprisingly, you only need a few pieces of of kit from your toolbag:
▶ Socket wrench
▶ 24mm long reach socket
▶ Socket Extension
▶ Torque Wrench
▶ OEM Oil Pressure Switch
A Step by Step Guide
This is a very straight forward process and should take more than a few minutes. With the OEM air Box in the way, once removed this should have a total time of 30 mins. If your lucky enough to be running ITB's then the whole process is shortend to about 10 minutes.
Make sure you purchase an original Oil Pressure Switch from Porsche. There are after market ones available more cheaply, but I have seen these fail to such an extent that the oil loss is huge increasing the likelyhood of damage to your valuable Porshe 911 engine. The Part Number is '911 606 230 00' which is the same for all 911's between 1974 to 1989.
If you have the OEM airbox installed, remove the whole assembly to give yourself more room to work in the engine compartment.
Locate the oil pressure switch. You'll find it at the back of the engine as you look at it, close to the rear chassis cross member.
Remove the oil pressure switch using the 24mm socket. You'll be able to confirm that the oil pressure switch is faulty at this stage as you'll see oil seeping through the switch where the plastic meets the metal shroud.
Screw in the replacement pressure switch by hand and then tighten to 15-21nm with a torque wrench. This troque setting is fine. Don't be tempted to over tighten or you damage the seat.
The final step is to re-assemble the airbox and anything else you removed to gain access.
And that's it really. A very simple straight forward job that would otherwise cost you a small fortune if carried out at a Porsche dealership.
Oil Pressure Switch Change Video Guide
We've put together a short video guide to take you through the oild pressure switch process. This video was taken during a pressure switch change on a 1974 911. You'll notice there is no airbox as this engine is fitted with Individual Throttle Bodies.
Get Involved in the dicussion
We think it's better to talk and would love to hear your thoughts on this article topic. Simply scroll down to read what other Channel P101tv members are saying about this article. Why not add your say. Your comments belong here! You can scroll to the end of the page or Click here
to add your comments now.
Page Views 3,103 |
Comments 1 |
Add your say to this topic. Your comments belong here!
There's Plenty of Articles & Guides
Our Porsche Articles and Guides archives are constantly growing. Take a look through the archives from the Articles menu or click on a preview from the carousel below.
Feel Free to Join in!
If you would like to join in, we would welcome your ideas for an artcle. If there's subject that you'd like to write about then get in touch and let us know. If the topic fits the reader's corner then we'd be pleased to publish it. You will of course receive full credit for the article as well as a link back your Channel P101tv Profile.
Share this page
Have we missed something or feel something should be added?
If there's something missing that you feel needs to be included or if something doesn't seem quite right, then please let us know. If you'd like to write an article for inclusion here then please get in touch. Just click on "Contact us" at the bottom of the page.
We hope you enjoy the Reader's Corner of the Porsche Folio!