911 oil Sender replacement

O.K. So now I know it's the oil sender located at the back of the engine, that's causing the leak.
Is there a way to gain access to replace this unit without pulling the engine?
By the way,
Thanks,for the information about what could be causing the leak and where the sender was located.

Yes, you can do it, but it requires a bit of patience and dexterity. I'm going from memory here, so bear with me.

You'll need to remove the air filter cover & filter to get some visibility. You'll need a strong light to shine behind the injection plumbing and use a mirror to spot the sender. I think the top of the sender is a red/orange color with one wire attached. To reach it, you'll need a socket (27mm, I think), a long extension and a socket wrench. Detach the wire, place the socket over the sender and remove. It's fairly easy to do that part - the trick is finding it in the first place. Refitting the new one isn't too bad, but you'll have to be able to fit your had into a confined space to start threading the sender.

It's a good idea to clean the surrounding area as best you can BEFORE removing the sender so you don't get grease & gunk into the mounting location.

If you search the archives, you should find a detailed procedure, this was discussed in detail before.

Are you sure its the sender that is leaking? My car had a leak that came from that area and dripped oil onto the heat exchanger and caused intermittant smoking at red lights. The problem turned out to be the O ring for the oil thermostat mounted next to the oil pressure sender. We replaced both while we were at it but the easiest and I think the only way to do it on a CIS car was to partially drop the engine. This consisted of supporting the motor with a jack, unbolting the two rear motor mounts and slowly lowering the engine until there was enough room to get to the unit. There is a tech article on this site on how to do "partial engine drop". It wasn't that hard so I encourage you to give it a try.

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Leland Pate

___79 SC Targa

Leland, I agree with you, but replacing the oil pressure sender is a $5 and 20 minute job, so its probably worth seeing if it fixes the problem. If not, then of course you need to move to other possible causes.