Oil Temp sensor location for 3.6 conversion

billjam · billjam's Garage

This is a cross-post from 911 Tech forum in case someone lurking here has some knowledge on this ...

I have been looking for a place to mount the oil temp sensor in a 3.6 engine (going into a 3.2). In another thread I posted a month or so ago, I picked up a couple of suggestions that proposed a remote mount in one of the oil lines, but I figured it was easier to mount it in the top breather cover at red arrow. Blue arrow is where it was originally.

I have since realised that in this location, the sensor is not actually immersed in oil, so the validity of its readings could be a bit sus.
Looking around the engine, I can see that the location of the sensor on a 3.2 engine is just a plain undrilled boss on the 3.6 (red arrow below).
This location in the end of the oil gallery is where the sensor was mounted on all pre-3.6 engines, so it seems to be the most logical place.
Question is ... has anyone else mounted their temp sensor for a 3.6 here (below)?
Can I expect any surprises when I go drilling for oil here?
Drilling and tapping the hole isn't an issue as the engine isn't assembled yet.

304065 · 05:07 AM

How about 993 101 768 01, the 993 part that fits right in the thermostat hole, carrying a pressure and temperature sender? An elegant solution. And only thirty-five bucks from our host here!

http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=OEM-99310176801&catalog_description=Genuine%20Porsche%20Part%3A%20 SENDER%20COVER#

MBruns · 03-23-2011, 05:15 AM

That part will work only if he is not using the engine cooler, the breather cover will not work either, it needs to be in an oil passage that is not a dead end also. Not many good choices short of where it is in the earlier cases.

Mike Bruns JBRacing.com

billjam · billjam's Garage

Mike is correct. I have replaced the original 964 part that held the temp and pressure senders with a 3.2 thermostat.

I am surprised that others with 3.6 conversions haven't had the same problem.
I'd love to hear from anyone who has drilled the oil gallery successfully. I can't see it being a problem, so I'll probably go that way.
There should be enough flow through this part of the gallery to get valid temperature readings because the oil feed to the RHS camshaft housing via oil passages in the chain housing is right in the same location.