1970 targa alive after 4 years parked !!!

[Telephunken]

An update to all of you who help me out with all the tips on getting my newly aquired 911 back on the road after sitting 4 years in a garage. I dont have a large knowledge of 911's but Ive worked on 356's and have owned many American classic cars. I didnt have a Porsche mechanic handy but my Friend who is a 50 year mechanic and as worked on thousands of american classic offered to help. (I told him to just think German)=) So after an initial washing and de-spider webbing the underside, her is what we did:
1. Replaced both batteries with new ones (got the Interstate brand ones recommended by forum members, thanks!)
2. Drained the fuel tank and flushed as best as possible;
3. Check fuel filter abd visually inspected the fuel lines, carbs, etc.
4 once batteries were in and we had power, we put about 2 gallons of new gas in the tank; we turned it one enough to get the fue pump working but had the rear fuel line off and draining in to a container to inspect the look of the fuel; this worked well until we got fuel spewing under the car in the front. It appears I missed a couple splits in the fuel lines! (I guess the tip I got on the forum about changing ALL the rubber fuel lines first was a good idea)
4. Changed out ALL the rubber fuel lines since it was fairly easy.
5. Second try.... this time we got good fuel flow, no leaks, etc.;
6. Fuel looked pretty good, so we reattached the fuel line and went for the real deal. At this point I feel like Dr. Frankenstein, the anticipation was awesome!
7. We let the pump get fuel in to the carbs, then we inspected very closely around the carbs for leakage. My friend who was helping me recommended "letting the carbs soak up the fuel for a few minutes";
8. Now we wet for it for REAL, she sputtered a little and then started up, after a couple initial small "pops" and spitting, she started running smooth. after about a minute she idled on he own at about 1,000-1.5 RPM's.
9. We turned her off and inspected agian for any leaks in the engine compartment and under the car. Everything looked good. Generator light flickered a little while running and Oil light stayed on green.
10. After second start and run about 10 minutes, we still were getting the green oil light on, and the temp guage wasnt moving. We looked around and found what we believed to be the temp sender wire not connected, we touched it to ground and needle jumped up so we knew it was the rigt wire and the guage worked. We reattached it.
11. Checked the brakes, etc., all felt good, lights al working (after cleaning a few connections in the bulb holders, etc.) All systems about 90%.
Maiden voyage time!!!! Tok it slowly down the street and then around the block. She ran very smoothly. She felt like she wanted to just run but I didnt get carried away. (I felt like taking a horse out of a barn for the first time and not letting her run!)
Back in the garage for further maintenence now. We plan to drain/ change the oil next and figure out a mystery wire we found disconnected...
So after a short trip down the road, and a few wasp nests dropping out from underneath, I think she is happy she is running again and someone cares about her.
Any input anyone has on things so far and moving forward would be much appreciated. My questions at this moment are:

1. The green oil light indicates "low oil" or low pressure? Should it go off after starting?
2. We have a disconnedted wire in the engine area that needs a home; it appears grey with red stripe and leads back to behind the fan shroud, comes off the same part of the harness as the oil sender wire, but cant see where it should go?? (I can post a pic if need be)
3. Last question for now: there is a round thing which looks like a thermostat right in frnt of the oil sender that looks as though it may have had something connected on top of it? What is this and is there suppose to be something connected?

[Telephunken]

[OttoB]

Congrats, man! Like most of us here, our cars are works in progress and kudos to ya in awakening the Targa from its long hibernation!!! Good luck with the rest of the to do's.

[JJ 911SC]

Great.

For your # 3 question sound like its the Oil Pressure Sender and a cap would connect to it.

The cap could be gone so there would be a wire loose not to far, probably the one referred to in your # 2 question. If you ground it the Oil Pressure gauge should go to 0 and peg out (5) when not connected. It usually run along the Oil Temperature wire.

A pics is worth a 1000's word, as soon as you'll post one you'll get an answer

[Paulporsche]

Congratulations! Keep up the good work.

[RSTarga]

if you haven't changed your oil and filter, do it now.

[Telephunken]

Thanks guys. Anf RSTarga, the oil change is the next thing on the list! JJ, Here is a pic of the object in the engine compartment and unknown wire that I was referring to...

[Hugh R]

Can't help but nice. Its like breathing life into metal.

[JJ 911SC]

OK, not the Oil Pressure Sender.

Its the Oil Thermostat, part # 901 107 751; Pelican Parts - Product Information: 901-107-751-00-OEM

From here, the cap at the end of the mystery wire should fit on top of it.

[JJ 911SC]

Originally Posted by JJ 911SC

... From here, the cap at the end of the mystery wire should fit on top of it.

Maybe not, but seem very coincidental close connection.

Here is a link to the Catalog for your car (1970-1973): http://www.porsche.com/all/media/pdf/originalparts/usa/911_USA_70_73_KATALOG.pdf

On page 001 of Figure 101-05, the Thermostat is item 57 and shows a nut and washer going on it obviously holding something...

On page 001 of Figure 901-00, (901 is the electrical section) I did not see a reference for it. I took a quick look at the rest of Section 901 and did not see anything but you might want to take another look.

Do a separate posting title "What goes on top of this" and while Curiosity killed the Cat, the challenge will bring you the answer

[gamin]

On my 70 there is nothing attached to the thermostat. Never has been. Your gray/red wire may just be the wire to the oil press sender which is in the same area. Silver can. Mine is a green red wire to the oil press sender. Your wire may be faded green/red.

[al lkosmal]

That is your internal oil thermostat and there are no wires connected to it. I believe that the wire should go to the oil pressure sender. i,m not sure if the 70 is exactly like my 71, but I checked on my 71 Wiring Diagram, Grey and Red is the Microswitch. (Green and Red as stated above is oil pressure )

Here is pic of my 71E engine....as you can see the Oil Pressure Sender wire is faded to the point that it does appear to be Grey and Red. This wire is routed through the 14 pin connector (Pin 4?) on the engine harness and then through the 14 pin chassis harness (pin 4?) and then to the oil pressure gauge, so you should be able to do a continuity check, using your multi-meter.

regards,

al

[Telephunken]

Thanks All, gary, and JJ. I have posted another couple pics below so you can see from a better angle. The oil PRESSURE wire is attached as you can see (the previous phot it was out of view); this is a GREEN / RED wire. thia checkes out in the wire diagram i have also posted a pic of. the second of three wires they show should be a GREN / BLACK for the Oil TEMP. This is sender that is located up front to the right of the fan near the engine #. I have this one attached (although it wasnt at first); Im sure this is correct because when I touch the wire to ground the temp gauge jumps up. The THIRD devise they show is the oil LEVEL TRANSMITTER. what this I dont know. but it shows TWO wires attached, like a green/white AND a RED? maybe a ground? I dont have any "orphan" wires that color...
So that leaves us with the the mystery wire still, and wether or not there should be anything attached to that part i posted the pic of before. I agree with All that there may not be anything required there. It doesnt have a "spade" or wire connection on top of it like a wire should connect.
Let me pose this theory: could it be for something I dont have? what I mean is that My guages seem to be the "low end" which only have the temp on top of one, and just the "idiot" lights for OIL and GENERATOR; then on the far laft I just have fuel level. I have seen a "combo" gauge on other cars with more in each of these two instruments that measure other things--?

[Telephunken]

Not to pose another question, but back to what RSTarga had said about changing my oil, made me remember another question I had: After I drain the "resevoir" in the rear fender well and the sump, when I remove the filter is the oil in the filter just going to run into the engine compartment and make a mess when I remove it? seems like they would have come up with a better "drainage" system.--?
And also, Ive gotten much input on oil types and weights; Im leaning towards the VR1 that Gary recommended, but im I making a big mistake using something standard like Castroil GTX or something like I would have used for my 356's in the past? and I live in Sacaramento, CA area, best weight for this climate? (FYI, car has 95K miles on it)

[rwest]

Put a couple paper towels under it, it won't leak out much.

[al lkosmal]

Do you have a microswitch on the throttle linkage? I'm looking at a 69 wiring diagram and a 71 diagram and the red/gray is hooked up to the microswitch.

[Telephunken]

Not sure Al, Ill check, thanks!

[47silver]

If you can get waynes 101 project, a Haynes manual, and Waynes rebuild book as a minimum. The 70 is similar in many respects to all model years at least to 1983. Oil change info, torque values etc are in these books.
Get new gaskets for the sump, use real Porsche recommended filters that pelican sells. Get oil plug crush washers.
You did not mention brakes. Please change the rubber lines and change the brake fluid completely as a minimum

[Telephunken]

Thanks guys, lll check out the filter mentioned and the brake lines. thanks!

[gamin]

Mahle OC-61 filter. Hand tight. Rag under filter for the few drips that might happen. Putting the oil in is the fun part. Get some kind of funnel to avoid a mess. Castrol GTX ain't what it used to be. I used to use it, I now avoid it.