need some guidance getting a previously running 930 back on the road

[nitewing117]

Hi all,

This is actually my first time ever being on the forum, and, outside of doing oil changes for my dad's 930 and some work on his 944, this will be my first time working on a Porsche. Long story short, my dad has a 930 slantnose that was involved in a cosmetic accident, and has sat since (10+ years). It was running fine before the accident, but due to lack of time and circumstances, he was never able to find time to work on it. I'm hoping to get it back on the road for him by this June.

Is there a 930 specific checklist of things I should expect to change or inspect? I have a good amount of experience maintaining, building, and racing my own vehicles (94 RX7, miata, basically imports), but I'm not sure if there are Porsche specific things I should expect. At minimum, I'm assuming I should check/replace any rubber hoses or couplers and drain all fluids. Any special tools I should start looking for?

Thanks in advance. Definitely looking forward to this project.

[Ken911]

the fuel system will be completely gunked up. the fuel head will need cleaned along with injectors, etc.

[flightlead404]

I would also put in a new, freshly charged battery. If there was any fuel in the tank it will need to be cleaned out before you add fresh. Do an oil change. And have a good read of the "why my car won't start" sticky thread.

[infraredcalvin]

+1 on the comments above, especially the “car won’t start” thread. Also, post your location, lots of good people here willing to lend a hand...

[TurboKraft]

+1 on refreshing the entire fuel system *before* you try to start it! If there's one thing CIS systems do not tolerate, it is contamination.

* Drain the tank, remove and have flushed (eliminate scale and/or rust), replace the strainer and seal and seal (foam) to chassis
* Replace the 12mm (1/2") ID rubber hose from the tank to the front pump
* Flush out the chassis lines, blow out with compressed air
* Replace the fuel filter
* Test the fuel pumps, replace as necessary
* Remove the fuel distributor, warm-up regulator, and injectors for professional cleaning and testing -- TurboKraft offers this service, as does CIS Flow Tech

When reinstalling the system, bypass the CIS by connecting the FD's fuel supply hose directly to the fuel return line. Add fresh gasoline, energize the pumps, and flush the system again for 15-30 min.

The rest is like resuscitating most any other older car. Change the oil & filter, check the plugs and replace as needed, etc.

Be prepared for oil leaks from dried out seals.

[flightlead404]

Originally Posted by TurboKraft

+1 on refreshing the entire fuel system *before* you try to start it! If there's one thing CIS systems do not tolerate, it is contamination.

* Drain the tank, remove and have flushed (eliminate scale and/or rust), replace the strainer and seal and seal (foam) to chassis
* Replace the 12mm (1/2") ID rubber hose from the tank to the front pump
* Flush out the chassis lines, blow out with compressed air
* Replace the fuel filter
* Test the fuel pumps, replace as necessary
* Remove the fuel distributor, warm-up regulator, and injectors for professional cleaning and testing -- TurboKraft offers this service, as does CIS Flow Tech

When reinstalling the system, bypass the CIS by connecting the FD's fuel supply hose directly to the fuel return line. Add fresh gasoline, energize the pumps, and flush the system again for 15-30 min.

The rest is like resuscitating most any other older car. Change the oil & filter, check the plugs and replace as needed, etc.

Be prepared for oil leaks from dried out seals.

Chris makes an excellent point, as usual. I went through this a few years ago, although my car had not sat for as long. You might as well go ahead and buy a set of all the major seals and gaskets that are easy to get to, because its probably gonna start leaking like a Harley 20 mins into your first drive.

Here's a list to get you started lol p/n's for '86 Cali car
911 602 102 01 Dizzy o ring
911 602 801 00 Coil cap
901 602 502 00 Coil
901 211 194 00 Heater duct RHS
901 211 196 00 heater duct LHS

930 110 122 00 Airbox to intake
999 701 469 40 inter cooler inlet
930 110 379 00 inter cooler inlet
930 110 230 00 pressure pipe to turbo
999 701 473 40 pressure pipe to turbo
999 701 477 40 ic outlet
999 701 468 40 bov housing inlet to throttle housing
930 110 197 10 (2) bov housing to flange

930 110 401 01 thermo valve
930 606 117 03 temp sw
900 123 007 30 (2) sealing ring for above
930 107 791 01 breather cover gasket
911 606 230 00 oil pressure switch
999 707 314 40 thermostat o ring

999 192 176 50 alternator belt

999 704 172 50 oil cooler top
999 704 017 50 (2) oil cooler bottom

911 107 176 03 oil tank plug
900 123 011 20 sealing ring

[infraredcalvin]

Another thing, since you’re not familiar with working on Porsches, make sure you understand how to put oil in the engine. The 930 takes a ton of oil, but the last few qts should be with the engine warmed up and thermostat open. Lots of stories of overfilling and dropping the dipstick into the tank...

[nitewing117]

Thanks for the tips so far!

Originally Posted by infraredcalvin

Another thing, since you’re not familiar with working on Porsches, make sure you understand how to put oil in the engine. The 930 takes a ton of oil, but the last few qts should be with the engine warmed up and thermostat open. Lots of stories of overfilling and dropping the dipstick into the tank...

Thanks for reminding me about this. I used to help him with oil changes when I was in grade school and remembered it took cases of oil, but I forgot about the bit about the last few quarts.

[flightlead404]

Originally Posted by nitewing117

Thanks for the tips so far!



Thanks for reminding me about this. I used to help him with oil changes when I was in grade school and remembered it took cases of oil, but I forgot about the bit about the last few quarts.

Engine up to temp, on level ground, and running.

[Ken911]

very good!!!