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.

Coolant replacement on 2005 911 Carrera S

Thursday 01/20/2022 | 2005 | 911 Carrera S | Other | 213 views

Have had this car since new. It currently has 16,248 miles on it. When I bought it, I was under the understanding that the coolant was "permanent" and did not have to be changed. Is this true? That said, I have not changed it. Should I?


Is the IMS bearing problem truly an issue on a 2005 911 Manual Carrera?

Wednesday 01/19/2022 | 2005 | 911 Carrera | Engine | 162 views

TPMS won't learn

Wednesday 01/19/2022 | 2007 | Cayman S | Wheels and Tires | 174 views

Had new sensors put in by a reputable tire company in Silver Spring MD. The tpms sensors indicated battery issues.  This group replaced the tpms sensors 6 years ago. They also used the 433 mz frequency. They have a handheld device which communicates with the car's computer through the OBD port. All wheels are signaling correctly but the system will not 'Learn". Question is, will a PIWIS system or other system read all of the antennas to hopefully point to a pro ...


I am a new owner to a Porsche - I just purchased a 2014 Boxster with 35,000 miles. I live in Iowa, where the winters are very desirable. Thus, I only drive my Boxster when the roads are clear (it is otherwise garage stored): What is recommended winterized care - what is the minimum time that I should drive it in the winter, or is it good just to start it and let the engine run for 10-15 minutes without driving it? Thanks, Ed

Tuesday 01/18/2022 | 2014 | Boxster | Engine | 318 views

2007 Cayman S, I have an intermittent start issue cold or hot

Tuesday 01/18/2022 | 2007 | Cayman S | Electrical | 126 views

2007 CS. On SOME first cold start and SOME, not all follow on warm start attempts I turn key and nothing but a mild click. Dash lights come on as normal. My nx step is to turn key back off and back on. Usually on 2nd or 3rd try the car starts up fine. I have changed my clutch interlock switch and have a new battery. When car starts there is No abnormal starter noise. Car runs great and I have zero fault codes with my Foxwell or Durametric. Car has 41K mi and this issue began around 37K mi. Ig ...


Recommendations for changing stock exhaust for better sound and performance

Sunday 01/16/2022 | 2010 | 911 Turbo Cabriolet | Performance Modifications | 72 views

Other than Porsche Sport Exhaust what other brands and models for throatier sound and some performance enhancement


Black Window Trim Touch-Up Paint Sought

Sunday 01/16/2022 | 2003 | 911 Carrera Cabriolet | Paint | 66 views

Porsche Friends: Can someone please recommend a supplier for the black matte paint for rear window trim? Need to touch up a small scratch. Many thanks. Best, EWC


Porsche shops on the Treasure Coast to do IMS bearing upgrade??

Sunday 01/16/2022 | 2002 | Boxster | Transmission/Clutch | 105 views

Just bought a 2002 Boxster. I would like to do an IMS Bearing upgrade (and clutch while we're in there). Not even sure if it hasn't been done already. Looking for someone who has done it on a regular basis....not a rookie. Suggestions??


What tires are recommended for my 68 912 Targa

Thursday 01/13/2022 | 1968 | 912 Targa | Wheels and Tires | 84 views

Radio Locked

Wednesday 01/12/2022 | 1995 | 968 | Accessories | 30 views

Incorrect radio code has been entered and now the unit no longer turns on except the back lighting. I've been told the radio will do this if the code has been entered incorrectly and now will need to have some internal components replaced as this is part of the anti theft measures.... is this true and if so, suggestions on a repair shop?


Are there specific things to look for before purchasing a 1964 356 SC?

Wednesday 01/12/2022 | 1964 | 356 | Electrical | 24 views

I'm a novice with regard this model but I love the styling. Are there obvious pitfalls to avoid when looking to purchase one? I'm guessinglooking carefully for rust and other body issues. Are electrical gremlins in this model? Any specific engine/transmission issues common?I'm in Colorado and it would live between 5800 and 9000 feet. Is that unrealistic? Are parts still reasonably available? Are there any experienced pilots out there that might have knowledge of th ...


Reference/speed sensor connectors replacement

Wednesday 01/12/2022 | 1988 | 944 Turbo S | Electrical | 102 views

Does anyone have any instructions or can you give me directions the best way to assemble the connectors that I just purchased.I am wondering the best way to get the pins through(assuming from the rear of connector), orientation of the pins, etc. Also, since only 1/2 of the old connector is damaged, if I replace 1/2 of the new after market connector, will it fit on the other half of good Porsche OEM connector? ThanksAnthony Cosma ...


Can you recommend a local shop to perform basic maintenance, oil change etc.

Monday 01/10/2022 | 2011 | Cayman S | Other | 144 views

I'm looking for a diy garage in the Washington DC area?

Monday 01/10/2022 | 2000 | 911 Carrera | Other | 45 views

I found Garagetime but their website says they are no longer providing access to garages. It's an engine out repair and I need to rent tools.


Boxter start Up Smoke

Sunday 01/09/2022 | 2010 | Boxster | Engine | 393 views

I have a 2010 Boxter 2.9 Liter six cylinder engine with PDK 7 speed trans with 53,899 miles.. I notice a puff of smoke from the exhaust from most start-ups after sitting overnite or longer..I don't notice any smoke at any other time like hard acceleration or normal driving It appears to have a little bit of Blue smoke mixed with water vapor. Is this normal or might it be an AOS issue?


On the configurator there are two different versions of the Cayman Carrera Sport wheel: bright silver on the full car illustration and medium grey with chrome edging on the pop-up information window. Which is correct?

Sunday 01/09/2022 | 2017 | 718 Cayman S | Wheels and Tires | 96 views

Momo wheels 944 Turbo 1986

Sunday 01/09/2022 | 1986 | 944 Turbo | Wheels and Tires | 84 views

Looking to run 17X8 fronts & 17x9.5 rear Momo Heritage 6 wheels, does anyone know the offset for this particular set up is?


Fluid dropping on pavement under right front radiator

Sunday 01/09/2022 | 2003 | 911 Carrera 4S | Other | 114 views

Noticed some fluid leaking under right front radiator after driving with A/C on. Checked coolant reservoir and it is slightly below (half inch) on reservoir.I’m thinking this is normal condensation from running with A/C on? Car does not overheat, water pump and V belt replaced at 58k miles.Any suggestions appreciated as well as recommendations for “good Independent shop in Naples Fla. area.


Should I replace my Boxster's broken cupholder?

Saturday 01/08/2022 | 2007 | Boxster | Interior/Upholstery | 234 views

The spring loaded in-dash cupholder in my '07 Boxster no longer latches, no matter how gently nor how hard I close it.Is there a reliable replacement? ( more than one choice? a preferable source? )How long can I count upon its lasting?Is there a description or video about replacing this piece? Or should I simply SuperGlue the current unit shut and call it a day?Thanks in advance for your time and for any ...


My 2001 911 is making a vibrating noise in lower gears on deceleration. Any ideas?

Saturday 01/08/2022 | 2001 | 911 Carrera | Engine | 111 views

The vibration has just started and is not bad but noticeable. Not happening on acceleration.


Defective Variable Valve Timing Solenoid - Oil Control Valve?

Saturday 01/08/2022 | 2012 | Cayman S | Engine | 93 views

My car has been throwing fault codes P000A and P0016 for the past 3 years. This occurs intermittently at start up and then resets to normal after 5 starts. It has a tendency to occur 6-8 months into an oil change. I am using Mobil 1 0w-40 and have changed the passengers side camshaft position sensor twice now. The car has 51,000 miles, idles smooth, accelerates without loss of power, and continues to get good gas mileage. Could this be a defective Variable Valve Timing Sol ...


CEL Light on - Code is P0442

Friday 01/07/2022 | 1999 | 911 Carrera | Fuel System | 102 views

Hi PCA,I recently purchased an early build 1999 C2. The car's CEL came on and I brought it to my local Porsche Indy shop to read the codes, the code turned out to be P0442 "Tank Vent System" and "Minor Leak". The gas cap is original to my car and looks like it's seen better days so I will probably change this first as it's the easiest solution. Is anyone else familiar with this code? What are the other usual suspects associated with this code? ...


Door seals leaking

Friday 01/07/2022 | 1971 | 911T | Body | 60 views

I have a reconditioned 1971 911 T I just purchased. The door gaps are good and all the door hardware is new. It has new door seals but there is excessive wind noise near the pillars on both doors above 30MPH. I've heard that some replace the early 911 door gaskets with later model 964 or 993 stripping. Do you have a recommendation for fixing this. Thank you, John


86 951. Original K26/6 with Jon Milledge chips, shims and drilled cycling valve. I bought an Al bodied diverter valve that came with 3 springs, I assume the "middle" spring is in there. Anybody played with these?

Thursday 01/06/2022 | 1986 | 944 Turbo | Engine | 84 views

Coolant heater hose

Wednesday 01/05/2022 | 1988 | 944 Turbo S | Engine | 75 views

GeorgeI think I may have found the hose. Part number 94457238501. ThanksAnthony Cosma


Recommended local service shops

Wednesday 01/05/2022 | 2009 | Cayman | Other | 255 views

Curious if there is a list of PCA approved service shops or other member driven recommendations for local work, including basic maintenance. Particularly close to DC metro. Thanks!



Wednesday 01/05/2022 | 2002 | 911 Turbo | Performance Modifications

Hi - I would like to get a more 'throatier' exhaust for my TT, Fabspeed seems to have a good selection, I don't want the drone of course and want to keep the same style exhaust tips. The sound on this TT is stunning, anything like it? Thanks


996 TT Radio

Wednesday 01/05/2022 | 2002 | 911 Turbo | Electronics

HI - What radio would you recommend to upgrade the radio too, there is this expensive but very classy option Every Car Radio Upgrade Should Look as Good as Porsche Classic's ( - welcome your thoughts. Thanks,


Replacement connectors and heater house

Wednesday 01/05/2022 | 1988 | 944 Turbo S | Electrical | 114 views

Hello George:Happy New Year.  The hose I need is a coolant hose that seems to be part of the heating system.  From I can see it look like it bends to a 60 to 90 degree angle. Are you saying that I should make a hose instead of buying the specific part? Also I have another question:When I removed the intake manifold, the two connector caps disintegrated,(see attached image) exposing the pins.  I filled the ...


need help to Identify small coolant hose rear of engine

Tuesday 01/04/2022 | 1988 | 944 Turbo S | Engine | 177 views

Can someone help me identify a small coolant hose. It is the rear part of the engine. I have attached two photo's. One photo is the part the hose is attached to(you can see the part has small orange rings) and part that I need which is the short rubber hose (near my finger in the photo). The house runs slightly down the firewall. Please let me me know if you need any additional photos.Thank youAnthony Cosma ...


second set of wheels for winter tires on a 2005 997.1

Tuesday 01/04/2022 | 2005 | 911 Carrera | Wheels and Tires | 102 views

I found a set of used 19" genuine porsche lobster claw wheels on sale. I want to purchase them to mount a set of winter tires to make it easier to switch my tires out season to season. Dimensions are as follows:Front: 19" x 8" ET +57997.362.156.00Rear: 19" x 11" ET +67997.362.162.01My current wheels are 19" carrera S wheels. Any reason these wouldnt work on my car?


what could be the cause of miss fire on cylinder 5. Coils, plugs replaced in past two years, fuel injectors replaced this month.

Monday 01/03/2022 | 2008 | Cayman S | Engine | 126 views

Bought in 2016 with 36,555 miles on it. First year check engine light would come on and engine would be misfiring. When checked it showed cylinder 5 was misfiring. during first two - three years, it would resolve itself, sometimes just restarting engine would work, sometimes just continuing to drive it would stop misfire. I would have the Check engine light reset and sometimes i would not reset and all worked well. recently the check engine light came and started blinking. Have it in ...


when the passenger door is opened, the window goes down 1/4 inch. When the door is closed, the window doesn't go back up

Sunday 01/02/2022 | 2006 | 911 Carrera 4S Cabriolet | Electrical | 171 views

hard reboot not effective to restore pcm

Saturday 01/01/2022 | 2015 | Boxster S | Electronics | 96 views

The 3.1 pcm v4.76 radio has been rebooting for several weeks.Ii and the dealer both did the hard restart and handover but it didn't work, I thought that it might be a bad hard drive and replaced it with an ssd that I cloned. Still the same problem. Seems like a software issue and not hardware?


PDK low power red warning

Friday 12/31/2021 | 2010 | 911 Carrera 4S | Transmission/Clutch | 261 views

On two occasions the car displayed the transmission overheat in red for approximately 30 seconds before vanishing. The car never lost power. In my research I am seeing the could result in the need to replace the PDK. Apparently the trans temperature sensor cannot not be replaced. Is this accurate thank you


What do I need to do for 10,000 mile service?

Thursday 12/30/2021 | 2016 | Cayman GT4 | Other | 294 views

How to install backup camera in existing Infotainment package system

Wednesday 12/29/2021 | 2013 | Boxster S | Electronics | 231 views

I understand it is possible to install a backup camera and broadcast the images on the Infotainment system. A company called maxspeed had a package to do so but no longer can get the components. Anyone aware of who does this work or how this can be done?


I have a new noise that appears to be coming from the right side of the car. It is a bit of a rubbing or slight grinding noise when I turn right or go arround a right curve. Not constant but new. Brakes are fine and back tires are new. Need other ideas before I visit a shop.

Wednesday 12/29/2021 | 2007 | Cayman | Engine | 186 views

Is cooling line welding or pinning necessary on a 996 turbo?

Wednesday 12/29/2021 | 2003 | 911 Turbo | Engine | 9 views

Hello. Considering purchasing a 40k mile 996 turbo. I understand leaking cooling line fittings can be a major issue due to the sealant getting failing. Also understand that repairing costs about $5k and the lines should be welded or pinned in the block. Is this something I should demand in a car I am looking to purchase?


my cars clock no longer works!

Tuesday 12/28/2021 | 1988 | 924S | Electronics | 147 views

Hello George, my analog clock in the center console has given up the ghost. Right now I have the car in for a new water pump at an independent repair shop that has given me outstanding service these past 20 years He informs me that he doesn't know how to find a replacement or where to send it for repair. I'm desperate to keep this car as original as possible because in 2005 I won Preservation class outright at Hershey. Any help would be greatly appreciated!! Gary ...


944 Service and Repair in North Houston area.

Monday 12/27/2021 | 1983 | 944 | Other | 57 views

Prefer an independent shop


Winter storage recommendations in an unheated detached garage w/o garage doors- 3 months.

Monday 12/27/2021 | 2008 | 911 Carrera 4S Cabriolet | Other | 120 views

What is the difference between “Meteor Metallic” and “Meteor Gray Metallic”?

Sunday 12/26/2021 | 2005 | 911 Carrera | Paint | 69 views

My 1985 Targa has “Meteor Metallic” and “Y5 listed as its color. Rennbow also seems to have more info regarding MGM, while MM info seems orphaned or incomplete. My paint color tag is attached.Thanks,John


edit dates for new old tires

Friday 12/24/2021 | 2014 | Cayman | Wheels and Tires | 261 views

UPDATED with correct dates...couldn't edit the original question..I dropped off my 2014 base Cayman at a new nearby Porsche dealer (11/2021) for State safety inspection and the tech sent me a video file of my tires showing cracking in the treads. They also stated they recommend tires be changed before about 6 years depending on use/condition. These were original tires (manufactured date 2013) so I asked them to replace all 4. When I was cleaning the mounting lube off of my n ...


Old New Tires?

Thursday 12/23/2021 | 2014 | Cayman | Wheels and Tires | 543 views

I dropped off my 2014 base Cayman at a new nearby Porsche dealer for State safety inspection and the tech sent me a video file of my tires showing cracking in the treads. They also stated they recommend tires be changed before about 6 years depending on use/condition. These were original tires (manufactured date 2013) so I asked them to replace all 4. When I was cleaning the mounting lube off of my new tires and wheels I noticed the 2 rear tires were manufactured in 1999 and the front 2 we ...