Technical Q&A

Welcome to PCA's source of expert advice, where our PCA National Technical Committee experts answer your questions about all things technical.

Is there away to have the backup camera run when you are going forward on my 2016 base Cayman? I track my car and it would be a benefit to have this work..

Wednesday 01/25/2023 | 2016 | Cayman | Accessories | 66 views



Just purchased a 2003 996 with has the PCCM Plus radio upgrade. Does anyone know if a backup camera can be added.. so far I’m having no luck. Thanks

Tuesday 01/24/2023 | 2003 | 911 Carrera | Electronics | 96 views



Grease for Door Check Straps

Monday 01/23/2023 | 1986 | 944 | Body | 96 views

My passenger door was very difficult to swing closed on the hinges, so I removed the check strap to clean it out and grease it. I cleaned it, but what kind of grease should I use that will last for years?

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PSM failure /seat heaters stopped functioning/911 cranked but will not start

Monday 01/23/2023 | 2006 | 911 Carrera S Cabriolet | Electrical | 78 views



PCCM+ Odometer bug

Monday 01/23/2023 | 2004 | 911 40th Anniversary | Electronics | 96 views

Hello - I've recently installed the PCCM+ unit in my 996 40AE car and have been really enjoying it. The unit has been great in use, however, there is one bug within the software that has been getting more attention. Specifically, at random, PCCM+ will cause the trip odometer, avg. consumption, speed to reset. This happens completely at random and I haven't figured out if there is anything I do to trigger it. I've spoken with one dealer about it but they didn't seem to know anything and could ...

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Newly installed PCCM on 2004 911 AE, that shuts down after 30 minutes. I can turn it back on, but it takes a minute or so. What can I do to prevent this?

Monday 01/23/2023 | 2004 | 911 40th Anniversary | Accessories | 66 views

The PCCM works great and I especially like Apple CarPlay. However it is aggravating to reboot every 30 minutes.

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PSM indicates failure seat heaters not working

Monday 01/23/2023 | 2006 | 911 Carrera S Cabriolet | Electrical | 102 views

PSM indicates failure seat heaters not working. Vin#WPOCB299X6S76931

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996 (3/98 build) ABS + Battery Light / electrical issues

Sunday 01/22/2023 | 1999 | 911 Carrera | Electrical | 63 views

Dreaded ABS + Battery lights came on recently on my early '99 996 C2 (3/98 build so super early). After about a 4 mile drive assuming battery would charge back up since it had been sitting for a while, wouldn't start and battery was completely dead.-Charged/tested battery; battery is goodREAD ANSWER

Fuel Octane rating

Sunday 01/22/2023 | 1997 | Boxster | Fuel System | 162 views

I just shipped my 1997 Porsche Boxster to Puerto Rico from Europe. The car runs on 98 Octane fuel however I cannot find a gas station in Puerto Rico that sells 98 Octane or higher? Are there any other alternatives?

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If I get new immobilizer, do I need to have all keys reprogrammed as well?

Saturday 01/21/2023 | 2002 | Boxster S | Electrical | 84 views

We got caught in a rain storm and lo and behold did not know that the drain plugs on the car were plugged. We bought the car about 6 months ago and discovered that mice hd chewed a few items, including the convertible top and foam boot. The form went down the drain holes clogging them. In the rain storm the rain could not exit the car and water came into the cabin and puddled under the drivers seat. Car had some erratic electrical issues and then ultimately would not start. I have done a ...

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How to handle bad oil and gas after an extended stay at a body shop?

Saturday 01/21/2023 | 2011 | Boxster Spyder | Engine | 108 views

My Boxster Spyder was in an accident in August 2022 and has not been driven up to temperature since. My situation is worse than a well-prepped winter storage scenario because the car has been moved around short distances in the time ever since (around the body shop and storage facilities). With parts supply chain delays, I anticipate getting the car back in summer 2023 so it will probably be a year out of commission. The fuel is at a half tank and I added fuel stabilizer about three months ...

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Looking for a shop to replace my cracked plastic rear window on my 2001 Boxster, I live in Massachusetts. Thanks

Friday 01/20/2023 | 2001 | Boxster | Other | 48 views



Water leaking into the passenger side seat well. I have cleared the drains , replaced the weather striping to the soft top and still no luck. Should my next move be to replace the weather stripping on the rear window. The water appears to be accumulating at the the lowest point of the rear seat.

Friday 01/20/2023 | 2004 | 911 Carrera Cabriolet | Other | 36 views



Will there be a retrofit infotainment option for the 997.2?

Thursday 01/19/2023 | 2010 | 911 Turbo | Other | 57 views

I'm interested in the porsche classic retrofit for my 2010 997.2 Twin Turbo Cabriolet?

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Advice on installing new Coilover suspension

Thursday 01/19/2023 | 2009 | Cayman | Suspension | 186 views

Hi, I am thinking of replacing the suspension on my Cayman as it has some miles and feels a bit rough. I do not race the car and usually only take it out 2 or 3 times a month on nice days for sporty but casual drives. I did some research and many people seem to recommend the Bilstein B16 PSS9 Coilover System. looking to get advice on if this would be overkill for my situation or any recommendations on other product's. Also what do you think is a reasonable range for installation cost (produ ...

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does Porsche allow OEM winshields to be installed as replacement equipment for a 1999 boxster

Thursday 01/19/2023 | 1999 | Boxster | Other | 132 views



When replacing a battery instead of using the more risky method of using alligator clips and a 12 volt source on the battery clamps, are the OBD connectors with a 12 volts that backdoor power to the ECU a safer & reliable method? These devices are often called an OBD Memory Saver Adapter Cable.

Tuesday 01/17/2023 | 2011 | 911 Carrera | Electrical | 51 views

Example of adaptor. https://www.amazon.com/dp/B009PHKPI6?psc=1&ref=ppx_yo2ov_dt_b_product_details

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Code P1117

Monday 01/16/2023 | 2001 | 911 Carrera | Engine

Code P1117 can this be caused by faulty 02 sensor or engine coolant temperature?

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Where is the emergency trunk release cable located for a 99 boxster?

Sunday 01/15/2023 | 1999 | Boxster | Cables and Controls | 144 views



CV Axle replacement

Sunday 01/15/2023 | 2005 | Boxster | Other | 147 views

Have a leaking inner CV joint and will be replacing axle. Original part number (987 332 024 05) has been superseded by 987 332 024 09. Is it recommended that axles be replaced in pairs when the part number is superseded? Could I potentially have axles with different specs? I’m I overthinking this?

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Hello. I have a Porsche 944 Turbo. I had the 100,000 miles service done (full engine reseal and changed anything that didn't look right once the engine was opened up). The car drove perfectly for a couple of months, but now when I start it, it won't rev above 1800rpms. If I force it, after a few tries and lot of shaking, it will go above that regime, and sound/feel just fine, but as soon as it gets below 2000rpms, the same thing happens. Basically, it won't operate between 2000 and 3000rpm

Sunday 01/15/2023 | 1986 | 944 Turbo | Engine | 189 views



Over rev report

Sunday 01/15/2023 | 2006 | 911 Carrera S | Engine | 69 views

When considering a purchase would an over rev report be a concern when showing:number of ignition range 3 306/994.6hnumber of ignition range 4. 177/190.3hnumber of ignition range 5. 2/172.6 hnumber of ignition range 6 0/0hoperating hours 1396.8

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Information on building a 911 2.0 engine to be a good street engine II

Saturday 01/14/2023 | 1968 | 911 | Engine | 63 views

First I wanted to thank you for responding back so quickly in regards to my first questions on rebuilding my 2 ltr engine. I love info I can trust. Of course it prompts other questions. If I go with 2.2 ltr heads, what would be required to install 2.2 cylinders on it. Can my 2 ltr cylinder be bored to accommodate the larger diameter pistons from J&E ? Or do I need to get 2.2 cylinders as well. And if I do need to get 2.2 cylinders, I assume I would need to machine the cases to accept the ...

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Besides the motor - what are the differences between 2011 987.2 Boxster base and S models?

Thursday 01/12/2023 | 2011 | Boxster | Other | 207 views

From what I understand the brakes are the same, minus red caliper paint (true?). I've read the manual transmission gear ratios differ between the two. What about suspension spring rates, etc? Is there a link or somewhere that details the exact differences? 

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Part #'s for Option [411] - Light Alloy Carrera 18" Wheels

Thursday 01/12/2023 | 2004 | Boxster S | Wheels and Tires | 54 views

I am trying to return the stock wheels to my 2004 Boxster S, when it was sold as new. A copy of the window sticker indicates that one of the options was for a [411] Light Alloy Carrera 18" Wheels. I have tried, though several sources, to obtain the part numbers for this option/wheel set, but cannot obtain the part numbers for these wheels (F/R). Can you help? If it helps, the car's VIN is WP0CB29844S660516 ...

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I have a '97 Boxster with a rear trunk "Boxster" name to be replaced.

Thursday 01/12/2023 | 1997 | Boxster | Paint | 222 views

The "Boxster" label on the rear trunk lid has partially disintegrated.I have a new label to replace it. Apart from grinding the old label off, sanding and repainting the lid> is there a solvent that will loosen the old label to remove it w/o damaging an existing good finish?The original finish is "Zeneith Blue"THX!Doug StowellGreenville, SC

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Can the oil pump hex drive be replaced with the engine in? (1998 2.5 liter Boxster manual transmission)

Wednesday 01/11/2023 | 1998 | Boxster | Engine | 159 views

I've read about the hex drive shearing and understand an upgraded heat treated alloy replacement exists. I'm doing some other, engine in, work while the car stored for the winter.Thanks for your time and expertise.

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Anyone know where to obtain engine suspension part #477199301 and 477199303 .

Wednesday 01/11/2023 | 1977 | 924 | Engine | 117 views

Can you replace just the rubber inserts ? I have not removed them yet. But I am rebuilding the central tube. That has bin removed.

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What is the Howling noise front passenger by the gas cap

Tuesday 01/10/2023 | 2003 | 911 Carrera | Fuel System | 237 views

Hello, I have that infamous coke bottle noise coming from the gas cap area. I replaced the Gas Cap, did not cure it. I replaced the vent valve, did not cure it. It seems to start making the noise when in drive at idle, as soon as I take off it stops. 

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Who is a good mechanic in the Washington DC metro area?

Tuesday 01/10/2023 | 2018 | 718 Cayman | Other | 276 views

I just got my first Porsche!! I am so excited. I would like to take it in for a general check up but I am not sure where to go. I live in Calvert County MD so likely I will go to Northern VA or Annapolis MD but I am not a big fan of dealers generally. I would like to establish a relationship with this shop long term. Any ideas? Please pardon me if this question is not appropriate for this forum. I am still learning and driving faster. Love my new baby. ...

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Resetting current date in PCM main menu.

Monday 01/09/2023 | 2008 | 911 Carrera 4S Cabriolet | Electronics | 171 views

Feeling like a true doofus, I want to set the current main menu date to todays date, and can’t seem to do so. Any ideas? John Prater- Smokey Mountain region

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Need a valuation expert for totaled 2006 911 Carrera Cabriolet

Monday 01/09/2023 | 2006 | 911 Carrera Cabriolet | Other | 129 views

I was given this address to contact Nathan Merz for an evaluation of my totaled 911. Canyon please direct this to Nathan Merz?

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Dry and wet boiling points of Porsche factory fill brake fluid

Monday 01/09/2023 | 2020 | 718 Cayman GT4 | Brakes | 183 views

I currently use Motul 600 RBF 3L for my annual brake/clutch fluid flush and noticed that Porsche dealerships sell Porsche DOT4 brake fluid for around $30/qt. What are the dry and wet boiling points of Porsche's factory fill brake fluids compared to Motul or Castrol SRF brake fluids?

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Information on building a 911 2.0 engine to be a good street engine

Monday 01/09/2023 | 1968 | 911 | Engine | 108 views

I am getting ready to rebuild my 2.0 ltr. engine from my 1968 911. I am researching what the best upgrades to my 2.0 Ltr street engine would be. I have Wayne Dempsey's "How to Rebuild and Modify Porsche Engines" book. He suggests 3 configurations. I am looking to build my engine for street use only. I am not looking for big horsepower, I am looking more for torque and ease of driving. The engines Wayne talks about looks like they are built for horse power. The first one says it is a good str ...

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Door collects water during rain storm

Monday 01/09/2023 | 1986 | 944 | Interior/Upholstery | 210 views

My car is parked on the street, it’s at a slight upward angle. We’ve had about 9” of rain in the last week. It was finally a partially sunny today so I thought I attend to the glove box fitting. When I got into the passenger side, no noticeable issues. I went over the driver’s side, when I opened the door about ½ gallon (maybe it was less but that’s what my impression was) of water spilled out onto the road, I’m not sure exactly from where, it was unexpected and I was ...

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Camshaft housing oil leak from the front

Sunday 01/08/2023 | 1985 | 944 | Engine | 153 views

I recently noticed a slight oil leak from the front of the camshaft housing (in back of the timing pulley and distributor). it's a very slight leak and I only noticed it because my son bought me a powerful LED work light for Christmas. Would it be safe/smart to tighten the camshaft housing bolts or at least check that they are correctly tight using a torque wrench? Also, is it correct that the camshaft assembly housing bolts are tightened to only 15ftlb, while the camshaft housing plugs which ...

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which of the many IMS bearing replacements / upgrades is recommended

Saturday 01/07/2023 | 2007 | 911 Carrera | Engine | 210 views



I am looking to add a roll bar, performance seats and harnesses to my 2004 911 that I track several times per year. Any suggestions on which bolt in cage I should consider?

Saturday 01/07/2023 | 2004 | 911 Carrera 4 | Accessories | 75 views



Tiptronic behavior in a 1999 Carerra 2 996.1

Friday 01/06/2023 | 1999 | 911 Carrera | Transmission/Clutch | 150 views

·        I have a 1999 porsche 996.1  (3.4L) carerra 2 with a ZF Tiptronic trans mission·        The transmission has been fully serviced recently·        I notice that when the engine is cold (in auto) I the car will start in 1st gear ·        When the engine is up to temperat ...

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My hvac is not getting hot.

Friday 01/06/2023 | 2009 | 911 Carrera S | Heating and Ventilation | 120 views

My HVAC is not blowing hot air. The car operates at 180 degrees and does not overheat. The AC works as it should and blows cold during the summer. I've replaced the vacuum control valve located in the engine compartment, but no changes. Next on my list is replacing the water pump and thermostat.Any suggestions?

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The TPS shows various low readings. at the front wheels, meaning it keep changing -2 left -6 right today actual pressures are consistent?

Friday 01/06/2023 | 2014 | Boxster S | Wheels and Tires | 141 views



986 IMS failure rate per manufacturing build facility.

Wednesday 01/04/2023 | 2004 | Boxster S | Engine | 315 views

Has there ever been a correlation between the 986 IMS failure rate and where the car was built (Germany vs Finland)? I am wondering only because my understanding is that the Finnish plant was "contract" to produce the vehicles. Maybe the engine assembly was only done in Germany, I don't know, therefore my question.

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Is there a video guide or printed guide for replacing the rear the rear window regulator?

Wednesday 01/04/2023 | 2006 | 911 Carrera 4S Cabriolet | Cables and Controls | 132 views

I know the regulators can be rebuilt. I am just not sure how to remove the interior panels to access it . I have been advised its a moderately easy job.

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Can a back up camera be added to a 981 Spyder?

Wednesday 01/04/2023 | 2016 | Boxster Spyder | Accessories | 267 views

A factory option that can be added later or an aftermarket solution bluetoothing from camera to my smart phone??

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Is there any shops in Frederick Md you would recommend to service Porsche's

Tuesday 01/03/2023 | 2006 | 911 Carrera 4S Cabriolet | Engine | 63 views



Has anybody replaced the plastic rear window in 987.2 Boxster Spyder with a plexiglass one? Seems like an upholstery shop could do job using the original rear section.

Monday 01/02/2023 | 2011 | Boxster Spyder | Interior/Upholstery | 150 views



How to eliminate steering wheel

Sunday 01/01/2023 | 2001 | 911 Carrera | Wheels and Tires | 375 views

I had the dealer balance the front wheels twice to no avail, the tires are Michelin Pilot PS2, it’s such a great driver but the highway rides are annoying.

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On a '85 944, what is the function of the "breather tube" going from one end of the steering rack to the other? If one end was found popped open (they look like plastic fittings?), could this be the cause of a power steering failure? Lastly, can this car be driven safely without the power steering working correctly?

Sunday 01/01/2023 | 1985 | 944 | Other | 213 views

After the loss of my power steering after changing the fluid (after the car sat for 30 yers), I have done the following:rebuilt the pump and replaced the reservoir along with the hose from the reservoir to the pump.then: replaced the pumpthen: replaced the high pressure hose from the pump to the rackthen: while preparing to replace the hose from the rack to the fluid cooler, found the loose "breather tube". Am I heading towards needing a new rack if I want power st ...

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What is the 12 volt socket good for?

Thursday 12/29/2022 | 2009 | 911 Carrera 4S | Electrical | 369 views

The manual says no air compressor so the cig. lighter socket works fine. Got a new hand held vacuum and its manual says to use the 12 volt socket but the 7.5 fuse blows. Are all fuses made the same? I used a China made one and it blew. Do I need a "Porsche" fuse or should I just forget about the socket all together. I like to keep everything working. Thanks!

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