Junk in the Frunk - My 993 has some serious junk in the frunk. Some items are for emergency replacement, some came with the car, and some are tools added for ease of field servicing belts or are specific to the car: Also not shown are the jack and a bag of accumulated small hardware bits. Below are listed a few important items.
The Original Equipment Emergency Jack.- The Original Equipment Emergency Jack, the jack that comes with the 993 Carrera is compact, lightweight, and extremely unsafe to use at the side of the road.
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| Original Carrera 993 Emergency Jack |
An inexpensive scissors jack from Walmart, Amazon, or really most auto parts stores is an option. In this case, one will need to modify the jack by adding a short bolt with washers and a nut forming a stud that interlocks with the hole on the lift point of a 964/993. This modification is very important as it protects the car from slipping off the jack during an emergency jacking event.
The Original Equipment Tire Inflator.- The compressor that comes with the 993and 964 is slow and unreliable and at this point, it is over 25 years old and may not work at all. Replacing it with a 12 Volt aftermarket compressor is easily purchased at Harbor Freight, Walmart, or really any number of retailers.
An Emergency Lithium Ion Jump Battery: Although not required, just a good idea. With modern cars, there is the potential to damage the electronics in the car used to jump-start of your 993. For this reason, I can no longer recommend jumper cables to start your Porsche with a weak or dead battery. As an alternative to jumper cables, I purchased a NOCO Boost Portable Lithium Jump Starter on Amazon. It cost about $100, fits in one's hand, and can be charged with a USB phone charger. Using it to start your car or for that matter, any car can be done without the risk of damaging another vehicle in the process. As a bonus once charged it can be stored in your car for long periods where its internal battery will not dissipate to any great extent.
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| Porsche Turbo Stytle Scissors Emergency Jack |
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| Generic Scissors Jack with nut, bolt & washers stud added |
The Original Equipment Tire Inflator.- The compressor that comes with the 993and 964 is slow and unreliable and at this point, it is over 25 years old and may not work at all. Replacing it with a 12 Volt aftermarket compressor is easily purchased at Harbor Freight, Walmart, or really any number of retailers.Be aware the emergency spare tire in a 993 or 964 is also over 25 years old. For this reason, I would use it for a very limited drive to wherever you plan to have your failed tire serviced or replaced. I would not drive in excess of 25 mph on this tire or use it as an interim solution to continue to drive your car for any other purpose. A new emergency spare can be purchased but it is very expensive.
Because of the recently developed unpredictable lead times when ordering tires consider keeping one front & back used tire in your garage at home. This is so one can be temporarily mounted to your car to safely drive your car while waiting for the new tire on order vs using the somewhat unsafe temporary tire in your frunk.
If you primarily drive your car locally in town another economical option is to consider buying a used full-size rim-with-tire used on eBay and storing it in your garage. In this way, you can either have someone bring it to you where you are stranded or drive straight home on the temporary tire and swap it out with the full-size rim & tire until you can arrange for a new replacement tire to be mounted.
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| 993.615.227.00 |
DME Relay failure - 993/964s like all cars have known failure items that usually show up in the most inopportune moments. For this reason, I keep a spare DME relay sometimes called a fuel injection pump relay part number 993.615.227.00, which fits both the 993 & 964, in my car. This relay has internal solder joints that fail from heat cycling & vibration without notice. If your car’s starter turns the engine over but it won’t start, starts intermittently or dies while on the road 99% of the time it is this relay located in the relay box in the frunk of your car. If you have access to a soldering iron this relay is easy to pop open and reheat the solder joints for a quick fix. Once fixed it makes a great spare to keep in your car.
An extra key, fob, and fob battery are always good things to have an extra complete 993 fob with a fresh battery on hand and stored in the frunk so one doesn't get stranded with a failing one. Any Porsche dealer can cut you a fresh key stalk from your VIN number if you would like to make a complete key set.
The electronic fob/key switchblade or its parts can be purchased new at the dealer or a used one can sometimes be found on eBay at an attractive price.
Also, a fob with updated electronics and its controller can be found at www.ecudoctors.com. The ECU items are individually or as a complete replacement system backward compatible with existing cars. Be sure to get the fob specific to the 993 referencing the same FCC compliance number printed on it as the one you use with your car.
For emergencies consider storing the extra key stalk in your wallet and the extra fob and fresh fob battery with the junk in your frunk. Many owners rehouse the fob electronics in a 944-style fob housing and use it in conjunction with the really nice classic Porsche flashlight keycap. Both of these can be purchased online as well. In fact, the housing can be had from eBay in color. My electronic key fob is Yellow; take a guess what color my car is? Mating the key fob to your car so the wireless lock works is quite easy. See Appendix “G”: to follow step by step: “updated-programming-key-fob-switchblade-key”
Extra Window Switch – An extra widow switch is always good to have on hand and can be swapped out in moments so as to not be left with a window stuck in the down position in the rain. The window switches in a 993/964 if manufactured in Germany or Eastern Europe are similar in design to the original factory-supplied part. The same part purchased under the URO brand and sourced out of China, although it looks identical, is an entirely different design internally and suffers functional problems that become apparent when attached in series to a second switch as is done for the passenger side window with switches on each door.
Belts Shredding – It is advisable to keep a set of fresh replacement belts as they also fail without notice and you will probably find that an on-the-road garage does not have these specific belts on hand. I also augment my factory tool kit with the few additional tools below:
- Three new pulley capscrews (900.976.004.01), and;
- A couple of extra AC compressor mounting square nuts (964.126.311.00) and;
- Two outer alternator pulley shims (964.106.268.31) #16 on the drawing to the right above, to make belt tension adjustments.
Keeping a small roll of emery cloth in the kit is also helpful in cleaning any rubber deposits that may have accumulated on the pulley halves and a Gates Krikit II Belt Tension Tester is an
inexpensive accessory that is always handy to have on hand for belt changes. Here is the factory document on how to properly tension the belts using the Gates Krikit II Belt Tension Tester.
With these items, if I am stuck out in the middle of nowhere I can replace the belts DIY.
Here are the belt part numbers listed in the catalog for the various models of 993:
"Pos"13 is the inner fan belt , "Pos" 14 is the outer alternator belt
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| The above table is from the 993 parts catalog. |
- For some reason, the catalog page above does not list the outer alternator belt number for the Carrera model the belt is a 999.192.343.50 9.5x760
- The M64.60 noted above is the Turbo model, Be aware that if your vehicle is a Turbo and has the factory pulley update, the outer alternator pulley is gold in color, is cast versus the stamped original, and takes a 999,192.373.50, 757mm belt
- The M64.06/07/08 & M64.22/23/24 are the Tiptronic models.
Additional tools to add to your factory tool kit:
- 24mm combination box wrench to fit the outer pulley hold down nut and a;
- 5mm Allen wrench socket tooltip and a 1/4" ratchet handle for it to secure the three inner pulley's hold-down socket head cap screws and a;
- 13mm combination box wrench & a 13mm 3/8" drive Socket and a 3/8" ratchet handle to free up the AC belt;
- A roll of electrical tape to help hold the compressor nuts during assembly so they do not fall down into the engine tin.
A special M10 12-point spline wrench (999.571.052.02) or 3/8" drive socket tooltip that fits on the fan/alternator center shaft is used to loosen and retighten the pulley nut. Verify that the tooltip/ratchet handle has a clearance between the alternator shaft and the engine mount cross-member otherwise, you may find you can't use it to service the belts.
999.571.052.02 - A Gates Krikit belt tensioning gauge and the factory page on how to tension the belts found here.
Here is a Rennlist discussion thread that describes what is found in the factory kit. It seems to vary by model year:
https://rennlist.com/forums/993-forum/1208039-authentic-993-tool-kits.html
https://rennlist.com/forums/993-forum/1208039-authentic-993-tool-kits.html
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Many times the spline wrench, supplied with the tool kit, goes missing. Check your kit and make sure you have it or a similar star-tipped socket tool
in case you or a technician needs to replace your belts when you are on the road. Recently I have read that some replacement aftermarket alternators use a slightly different from OE style star-tipped socket on the end of the fan/alternator shaft. For this reason, verify that the tool you have fits onto the end of your vehicle's fan/alternator/ pulley shaft. If not add the substitute tool to your kit.
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| M10-12pt. Socket tool |
Use care to make sure you have removed all the belt shrapnel from the failed belt(s) including debris that may have gotten into the fan when replacing the belts. If you ever replace the belts yourself on the road use care to reassemble the pulley components, including the shims, in exactly the order they were on originally as to not inadvertently lock the alternator pulley to the fan pulley. When you put it all back together verify that the two pulleys spin independently before tightening the belts down.
Run the engine for a few short trips to seat the new belts the go back and measure the belt tension with a Gates krikit® tension gauge and adjust the pulley shims as needed. This will in large part eliminate the premature failure of the belts that have contributed to the general belief that the OE belt set-up has a short service life. Here is the factory document on how to properly tension the belts.
As a little side note if you drop a shim or fastener while changing the belt so it fell under the lower main engine pulley and it cleared the pulley edge and slid under the engine, not to worry as over time it will vibrate further forward and fall out under the engine. Over the years I have lost stuff down there, nuts, washers, even an ignition wrench, never to be seen again. Losing stuff down there is only an issue if the item is too big to slide out of view where it can remain and wedge against the lower pulley. If something too large like a socket tool tip falls down there a long-handle forceps or even using a little machine wire as a fish tape with a hook bend on the end can bring it back up. Then again if one had stuffed a rag down there before starting work the problem would have never presented. Also, if available, using a little compressed air can eject onto the floor anything that made it past the pulley and under the engine and hasn't fallen to the ground yet.
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| Original Pulley |
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| Updated Pulley |
In addition to the above one can consider the pulley update listed in Porsche Service Bulletin 1378, “In case of alternator belt failure or belt noises in conjunction with pulley”
Parts include:
Parts include:
- The same belt to be used on Carrera (1 ea.) 999 192 343 50 (760 mm long)
- Updated belt to be used on Turbo (1 ea.) 999 192 372 50 (757 mm long)
- Pulley halves (2 ea.) 993 106 268 01 ( Cast, Yellow, chromate color)
993 106 268 01
- Shim (0.5 mm) 964 106 268 31 (as required)
- Shim (0.7 mm) 964 106 268 32 (as required)
You will know if this update has been applied to your vehicle as the upgraded pulley halves are cast metal and gold in color whereas the original pulley halves are silver stamped sheet metal. One of the upsides of this update is that the new arrangement does not allow for the storage of the extra shims on the hub of the installed pulley eliminating a potential cause of confusion in its reassembly during belt changes.
PS: The shim with the three fastener holes in it for the inner pulley is part number 964.106.517.01, #11 on the drawing further up on this page.
Here is the tool page from the dealer parts catalog:
If you found this page informative return to the main page and bookmark it for future 993-related servicing, repair, and upgrading guidance & information. If it saved you some aggravation, time or even some coin consider a donation through the button on the top left margin of this page.
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