Installed new temp sender/ gauge

[DavidI]

I just received a temp sender and gauge (from PP) for my 83SC and installed them in less than an hour. I used Wayne's 101 book and it was amost too easy. Outstanding step by step process. Good job Wayne!

David

[curlesw]

Great...I remember doing this, it was my first real project. I also remember how hard it was (for me) and how I had to deform my hand to screw the sensor in...wow

The temp #s are MUCH better than the bars.

v/r
Wayne C.
83 SC

[UTKarmann_Ghia]

Bah! Not if you have the 'ol legand

[DavidI]

I thought my car was running hot and was ready to install some kind of external cooler. I found that the engine in my 83 SC was actually an 81SC 3.0. In reading Wayne's 101 book, I read the upgrade tech article and it mentioned that the oil temp sending unit and the gauge must match. If they did not, the reading would be inaccurate. I decided to do the upgrade with the numbers instead of the hash marks.

Today I drove the car hard and found the temp at about the 200 degree range. The car was not running hot as I initially thought, the gauges did not match each other. Good news for me and my P-car, David

[douglas robbins]

While we're on the subject I have a few questions about temp guages and senders.

So I just had a mildly unpleansant experience with Palo Alto Speedometer here in Palo Alto. They were supposed to make me a custom temperature/fuel guage combo for my 914-6 with proper connection to my 3.2 liter Carrera engine's oil temperature sending unit. They screwed up the order in a lot of different ways. But I got my combo gauge back today. Unfortunately I dropped it off with them March 21, 2003. That's right, it took them almost one year to finish this job. To their credit, they deeply discounted the work, but you know, it still doesn't quite make up for the poor service.

As for my question:

Oil Sending Unit on 3.2 Liter: PAS failed to set up the temperature guage to properl connect to the oil temperature sender on my 3.2 liter engine. Instead they provided a new sender to install in the block. The problem is, I'm not sure now where the sender goes.

The Bentley Service Manual seems to be saying (on page 102-2, and on page 130-4 [part # 16 in the diagram]) that the temp sender is right next to the pressure sender on the back of the engine, to the right of the v-belt pulley. This seems to be coroborated by the engine lubrication diagram on page 170-2 that has the oil temp and pressure senders together.

But then the Bentley manual contradicts itself. On page 102-6 Bentley calls what I thought was the temp sender, the "oil pressure warning light switch." And then on page 170-6 Bentley, again, calls the little unit next to the pressure sender the "oil pressure warning switch." So I'm not sure if its a temp sender or a oil pressure light switch.

To make matters even more confusing, Bentley sometimes (see page 102-6) calls the little sensor at the front of the engine, near the flywheel and right next to the oil temp thermostat, the "oil temperature sender."

Any help please?

New Temp Sender. As a second issue, the sender that PAS gave me is different from all these senders. The sender is a VDO sender with the number 5.02, on one side and the sender number, 801/1/26, on another side. Will this sender fit in the temp sender location on my 3.2 liter block?

Thanks in advance,

Douglas

[aj88cab]

Douglas, you are correct about the Bentley manual.

The oil pressure warning light sender is at the pully end next to the oil pressure (guage) sender. The oil temperature (guage) sender is on top of the block at the flywheel end next to the oil breather. The lubrication diagram on 170-2 is very diagamatic and very misleading. The diagrams on page 102-2 and page 130-4 should have items #1 and #16 reversed. Page 102-6 are the photos if I recall and they are correct. The device locator table at the back of the manual is also reversed about these two sensors.

The reason I discovered this is last weekend I found a little oil on top of my block and I though it might be the oil breather gasket. What I found was a loose connector and what looks like a broken-off (slow leaking) sender. It must have just happened because the temp guage worked the day before. As I leafed through my Bentley manual to find out what it was I got more and more confused. I actually dug up my (previously useless) Haynes manual to sort it out. To make matters worse I think the Bentley manual refers to the flywheel end as "rear" and the pully end as "front"...or maybe that's the Haynes manaul. And just to be clear I think the Bentley manual is great, every new 911 owner should get one.

Now If I'm wrong about all this after running on about it, I'm going to feel real stupid.

Anyway, if anybody else has found errors in the manuals why not post them here for the rest of us. Especially for us (4 month newbies to 911s) who are learning about these great but sometimes frustrating automobiles.

I hope this doesn't rate as hijacking a thread:-)

Andrew

[sammyg2]

According to PET, the oil temperature sensor is on the rear of the engine right next to the oil pressure transmitter and the pulley.
The oil pressure switch is on top of the engine next to the crankcase breather.

[aj88cab]

I'm so confused

But, That's not hard to do these days!

I think I will just go outside and pull some connectors to see what stops working

[douglas robbins]

Thanks Andrew and Sammy. Good information. AJ's suggestion of just pulling the connectors and whatching what happens is also a good idea.

Douglas

[J Smith]

Originally posted by sammyg2
According to PET, the oil temperature sensor is on the rear of the engine right next to the oil pressure transmitter and the pulley.
The oil pressure switch is on top of the engine next to the crankcase breather.

I replaced both today and sammy seems to have it right. Temp sensor, rear of engine next to pulley. O.P. switch, top of engine near breather cover.

Josh

[aj88cab]

You know its not the first time I've been wrong and it probably will not be the last time. I must have spent a hour or more looking thru the manuals checking on the web trying to figure out which is which, and the entire time the answer was sitting 15 feet away in my carport. If I had bothered to get off my butt and look closely, the temp sensor is even is marked with a temperature rating. Now excuse me while I remove this foot from my mouth.

thanks all!