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.

Battery Minder

Thursday 07/29/2021 | 2019 | 718 Boxster GTS | Other | 36 views

Wondering best way to install a battery minder on my 718 for winter storage, app. 5 months annually.I do not have an active cigarette lighter port. There is a port in the passenger side well but I'm told this is not active when car is turned off.

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If I shut off the engine with the wheels turned in any direction other than straight ahead the steering wheel locks

Tuesday 07/27/2021 | 1998 | Boxster | Other | 96 views

the I can’t turn the key to start the car

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What size battery should I use for my 1989 944S2?

Tuesday 07/27/2021 | 1989 | 944 S2 | Electrical | 66 views

I need to replace the battery on my S2. I have trouble finding consistent info and would appreciate anyone's input.NTB recommends the Interstate MTP 27F with a CCA of 710 and CA of 890Interstate says the MTP 27F will not work for my car and in fact their selector does not come up with anything that fitsMy current battery is an Interstate MT40R with CCA of 590 and CA of 735 Sunset Porsche has OEM Porsche battery at 650 CCA (944 fitment but no ...

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Have a clicking noise coming from the front luggage area. Starts about an hour after starting car. Removed the cd disk from the mapping

Monday 07/26/2021 | 2008 | Boxster S | Other | 54 views

clicking noise is faint but detectable. About 100 cycles per minute. Definitely coming from somewhere around the navigation system. Removed the CD but still get the noise.

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I need an intake 4-6 camshaft for a 2003 2.7 M96.23, are any other 3 chain engine intake cams compatible? Can't find a #996 105 916 20 anywhere!

Sunday 07/25/2021 | 2003 | Boxster | Engine | 51 views



What is consensus RE: transmission fluid replacement Cayman Tiptronic?

Friday 07/23/2021 | 2007 | Cayman | Transmission/Clutch | 51 views

I cannot find anything in service schedule re: Tiptronic trans. fluid replacement. Service schedule only addresses manual and PDK. I know this is expensive, so I don't want to spend money if I don't have to.Thanks in advance- Wally

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How do I read the paint code on my '79 sc?

Friday 07/23/2021 | 1979 | 911 SC | Body | 123 views

I am trying to determine if my car has had a color change in it's history. Vin # 9199201317. Thanks!

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new convertible top

Wednesday 07/21/2021 | 2003 | Boxster | Body | 66 views

Hello, My current convertible top has a small tear in it and I think it is now time for a change. I've been looking around for a new top on a couple websites. Is there a particular top that the community recommends? Is it difficult to install myself? If I get it professionally installed, will my Porsche dealership do it? Thanks, Nic

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Check engine light appeared and diagnostic came back "secondary air Injection". How much could I expect for repair of the omissions issue.

Wednesday 07/21/2021 | 1996 | 911 Carrera 4 | Electrical | 159 views



COV in a 981 cayman

Tuesday 07/20/2021 | 2014 | Cayman S | Other | 225 views

I have a 981 Cayman S that gave me the "fault Cooling System" message and a P1432 error code when we scanned the car. In reading on line, the most likely cause is a defective Changeover valve of loose vacuum connection. Before I decide to tackle the project myself I'd like to know how in depth this may get. Therefore can anyone tell me how many COV are in  my car and where they are located. The car has a PDK but does not have PSE, PASM, or PTV. Also if anyone has a schematic, logic diagr ...

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Can anyone recommend somewhere to repair my rear hatch on my 951?

Tuesday 07/20/2021 | 1986 | 944 Turbo | Body | 99 views

The rear hatch on my 951 is just beginning to show signs of delamination/detaching from the frame. I made the mistake of replacing the rear struts, and this (not surprisingly) made the problem worse. I have reinstalled the old struts for now, but since the car is near perfect otherwise want to find a reputable shop to perform the repair. Ideally someone in the NoVA region.

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I have an early 97 Boxster that suffered a broken original shift link that is now listed as part no. 986-424-931-06. The new replacement part does not fit with the rest of the original linkage. One end socket is the wrong size. I understand that Porsche upgraded that linkage. Is there any way to fix the linkage without replacing the shift cables and other parts?

Monday 07/19/2021 | 1997 | Boxster | Transmission/Clutch | 120 views

Trying to get parts to fix shift linkage.

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Has anyone installed a FRONT HOOD FUEL FILLER KIT, 914 (70-76)'Sierra Madre

Sunday 07/18/2021 | 1972 | 914 | Fuel System | 36 views

This is for my one owner (ME) 914 currently being restored to 914 GT specifications. She was my daily ride for a few years in Atlanta. In 1974 pulled off the street to get my SCCA ticket and tried her out in “Show Room Stock and later, after some modifications E Production. That campaign ended by divorce. She returned to the street and was driven to Miami where she was stored. Hurricane Andrew in 1992 destroyed the building except for her coroner. She was then ...

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ABS and PSM lights on, functions do not work. The code I read is 4266 Return Pump fault

Sunday 07/18/2021 | 2001 | Boxster S | Brakes | 162 views

2001 986S with ABS and PSM. Sometimes when the car is started the ABS and PSM lights come on, sometimes when I press the brake pedal, and sometimes while driving and not pressing the brake pedal. The error code returned from a Foxwell unit is 4266 Return Pump Fault from the ABS controller. Are there other things that can cause this other than a bad pump. I have tried a fresh brake system flush with MOTUL 600 after the problem appeared, there was no change. Also changed all 4 brake pads before ...

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Windshield motor burned wire

Saturday 07/17/2021 | 1971 | 911T | Electrical | 84 views

Ed, the acrid smell of burning insulation and smoke came into the cabin. Close inspection shows wires burned on the front windshield wiper motor that connect to what appears to be an electrical component with "12 ohm [omega]" imprinted on it, sitting on top of the motor. This resistor, or perhaps a condenser/capacitor, is about two inches long and 1/2" square in width and height. My guess is that this failed and resulted in excess amperage flowing through the wires. Do you know what this ...

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In a previous response it was mentioned to connect a charger/maintainer directly to the battery and not through a socket. I just started using a Ctek charger/maintainer through a socket and all seems to be working well. Can you elaborate further why not to connect through a socket?

Saturday 07/17/2021 | 2007 | Cayman S | Electrical | 285 views



HELP... 1986 944 with out power locks -driver door wont open from inside or out

Friday 07/16/2021 | 1986 | 944 | Other | 102 views

Hey Guys,I'm new here and hoping someone can help out. I just bought a 1986 944 with out pwr locks and everything was working fine until my local tire shop put new tires on and said the door stopped working, I know I can hold them to it but they're friends so wanted to have a go at it myself. The door won't open from inside or out, the key doesn't push the lock all the way up like the passenger door (though the key turns up and down just fine), the outside trigger goes back to it's nor ...

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2014 981 door delamination

Friday 07/16/2021 | 2014 | Cayman S | Interior/Upholstery | 489 views

My interior doors have both started to delaminate, causing a gap between the panel and the window. Apparently this is a big issue for model years after 2013 after 5-6 years. There is a Facebook group devoted to this issue https://www.facebook.com/groups/2358858194195851. I have an extended warranty that only covers mechanicals. I was quoted $4800 to replace. It can't just be glued down as the airbag deploys from this panel.Wondering who else is having this issue and tho ...

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I have a clunking noise in the rear of the car when I hit dips or humps while turning left. Has been looked at by the local indy with no success. Sometimes pretty loud.

Sunday 07/11/2021 | 2015 | Boxster S | Suspension | 189 views

This noise sounds like it is coming from the rear shock tower, but noises can be very deceiving.

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Premium that you pay on a dealer vs a independent mechanic

Friday 07/09/2021 | 1996 | 911 Carrera | Engine | 150 views

Hello guys, how much premium do you think a Porsche dealer charges over a independent mechanic, a ballpark . 1x, 3x, 5x ? also if you know a good independent mechanic NYC area would be helpful best

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Marrying a 2005 car to a 2007 engine and écu.

Thursday 07/08/2021 | 2005 | Boxster S | Engine | 366 views

I don’t know what they have done before. what needs to be done to marry the two? I was looking for answers to how this can be done. Would you have any references? Perhaps an outside business that specializes in this process? mid like to find someone. Can contact for answers. Thank you.

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how to fix interior door panel becoming unglued at the top

Thursday 07/08/2021 | 2013 | Boxster | Interior/Upholstery | 276 views

interior door panel coming away at top @ side window

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Is there a good Porsche mechanic in the Tupelo ,MS area?

Thursday 07/08/2021 | 1998 | Boxster | Other | 81 views



How to marry a 2007 donor engine and ecu to a 2005

Wednesday 07/07/2021 | 2005 | Boxster S | Engine | 168 views

Hello and thank you. The engine on my 2005 Boxster S blew back in Nov 2020. In Feb., I purchased a 2007 engine and ecu, both from the same donor car. It has been in the shop at Griffin Motorwerke since then. The shop is having trouble marrying this donor engine and ecu to my 2005 car. Before buying the 3.4L engine, I was advised by a Porsche mechanic that it would work in a 2005, so I bought the engine and ecu. The engine is in the car and runs but bog ...

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Need a qualified body shop in the Sarasota FL area.

Monday 07/05/2021 | 2008 | Boxster S | Body | 75 views

I would appreciate any member experience or recommendations for who to take my '08 Boxster S to for body work repairs. Last week while I was hit by a deer causing damage to the front bumper, radiator and left quarter panel of the vehicle.Thanks in advance for your experiences, advice and recommendations.

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Hi, I'm used to pour a few ounces of engine oil in my 2.7 Cayman due to a small leak every month or two, it is not bad and I can live with that, the problem is the digital "dipstick" no longer shows the level needs to be replenished, it shows "full" all the time. I've tried measuring the level with the car downhill and uphill to see if the level changes but it always shows full. I haven't tried draining the oil yet because it has a few thousand miles left. Is the "dipstick" bad? the ECU?

Sunday 07/04/2021 | 2007 | Cayman | Engine | 375 views



Drivers side window does not drop until the door unlatches

Friday 07/02/2021 | 2007 | Boxster | Electrical | 177 views

When I open my drivers side door the window does not drop until the door is unlatched. Once the door is unlatched it drops and it does stay down until I close the door again. This happens when I open the door from the inside or the outside. I have a Foxwell scanner and using the live test function have confirmed that the microswitches on both the inner and outer door handles are working. I also checked the microswitch at the board level on the inner handle and confirmed it is working. The win ...

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Who is a good Porsche mechanic in Indianapolis, IN area?

Thursday 07/01/2021 | 1982 | 924 | Fuel System | 252 views

Cleaned fuel system, replaced fuel pumps. Trying to prime system with spark plugs removed. When key inserted in switch buzzer sounds.

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Emergency Brake does not appear to fully release.

Thursday 07/01/2021 | 1982 | 924 | Brakes | 198 views

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plastic stone guard removal

Thursday 07/01/2021 | 1986 | 944 | Paint | 588 views

On my 944 there is a stone protection clear plastic side guard panel in front of the rear wheel well. As you can see from the picture it has cracked and “crazed” from age. Is there a DIY way to remove this without damaging the paint? And part number to replace?ThanksJK

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The rear hinge on the driver’s side interior door panel is broken. Dealership says they can’t get parts and offer to replace the entire panel for about $2800. No thanks. Can I find a replacement?

Wednesday 06/30/2021 | 2014 | Cayman S | Interior/Upholstery | 48 views



The rear hinge on the driver’s side interior door panel is broken. Dealership says they can’t get parts and offer to replace the entire panel for about $2800. No thanks. Can I find a replacement?

Wednesday 06/30/2021 | 2014 | Cayman S | Interior/Upholstery | 303 views



Battery isn’t fully charging.

Tuesday 06/29/2021 | 2014 | Boxster | Other | 27 views

I’m the second owner and assume it’s the original battery. I’ve had the car 2 years it has 24,000 miles. I keep it on a Porsche Pro Battery Maintainer Religiously. The maintainer does not turn green, I assume the battery is not fully charging/charged. Looking for Recommendations wether to take to dealer, independent mechanic or attempt to DIY. Are any special tools required. Estimated cost of each would be appreciated. ...

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Battery isn’t fully charging.

Tuesday 06/29/2021 | 2014 | Boxster | Other | 381 views

I’m the second owner and assume it’s the original battery. I’ve had the car 2 years it has 24,000 miles. I keep it on a Porsche Pro Battery Maintainer Religiously. The maintainer does not turn green, I assume the battery is not fully charging/charged. Looking for Recommendations wether to take to dealer, independent mechanic or attempt to DIY. Are any special tools required. Estimated cost of each would be appreciated. ...

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What radios were available for the 1972 911S Targa? I have an AM radio I was told by the original owner came with the car. Is this correct?

Tuesday 06/29/2021 | 1972 | 911S Targa | Accessories | 33 views



What radios were available for the 1972 911S Targa? I have an AM radio I was told by the original owner came with the car. Is this correct?

Tuesday 06/29/2021 | 1972 | 911S Targa | Accessories | 207 views



968 w/ 17 inch wheels

Tuesday 06/29/2021 | 1992 | 968 Cabriolet | Wheels and Tires | 39 views

Porsche sold several 968 models with 17 inch wheels. I cannot find a part number for an emergency spare tire for a 968. I can find Boxster 17 inch spares, though these are not collapsible and so will not fit into the trunk mount for the 968. I checked the PET for the 968, any ideas on where to find this part? How wide would it be? Thank you in advance for your help!

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968 w/ 17 inch wheels

Tuesday 06/29/2021 | 1992 | 968 Cabriolet | Wheels and Tires | 126 views

Porsche sold several 968 models with 17 inch wheels. I cannot find a part number for an emergency spare tire for a 968. I can find Boxster 17 inch spares, though these are not collapsible and so will not fit into the trunk mount for the 968. I checked the PET for the 968, any ideas on where to find this part? How wide would it be? Thank you in advance for your help!

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I would like to use 20 Inch Porsche Boxster/Cayman 981 Sport Techno Wheels on my 2007 Boxster. Can the ECU be programmed for 20 inch wheels?

Tuesday 06/29/2021 | 2007 | Boxster | Wheels and Tires | 6 views

I am currently running 19 inch C2S wheels that were original to the car when I ordered the car in 2007.

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I would like to use 20 Inch Porsche Boxster/Cayman 981 Sport Techno Wheels on my 2007 Boxster. Can the ECU be programmed for 20 inch wheels?

Tuesday 06/29/2021 | 2007 | Boxster | Wheels and Tires | 228 views

I am currently running 19 inch C2S wheels that were original to the car when I ordered the car in 2007.

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Hot Restart Trouble: Over-insulation of fuel lines?

Monday 06/28/2021 | 1989 | 944 S2 | Fuel System | 57 views

George,After changing chain tensioner last spring I managed to crack the insulation on the fuel supply hose. Not knowing the age of the fuel supply and return hoses, I chose to replace them. As an additional level of safety, I chose to add silicone covered fiberglass insulated sleeve on both. Since, I have experienced a difficulty in restarting hot (after refueling, or getting a Slurpee). I can open the hood, remove the cover from the fuel rail and wait 10 mins and will ...

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Hot Restart Trouble: Over-insulation of fuel lines?

Monday 06/28/2021 | 1989 | 944 S2 | Fuel System | 168 views

George,After changing chain tensioner last spring I managed to crack the insulation on the fuel supply hose. Not knowing the age of the fuel supply and return hoses, I chose to replace them. As an additional level of safety, I chose to add silicone covered fiberglass insulated sleeve on both. Since, I have experienced a difficulty in restarting hot (after refueling, or getting a Slurpee). I can open the hood, remove the cover from the fuel rail and wait 10 mins and will ...

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I have a 2007 Cayman S. The windshield is badly pitted and scratched and is a semi Harare when you are driving into the sun. I am looking to replace the wind shield. I am looking at a genuine Porsche replacement or an after market such as Safelite. Does anyone have any experience or recommendations? Thank you.

Monday 06/28/2021 | 2007 | Cayman S | Other | 30 views



I have a 2007 Cayman S. The windshield is badly pitted and scratched and is a semi Harare when you are driving into the sun. I am looking to replace the wind shield. I am looking at a genuine Porsche replacement or an after market such as Safelite. Does anyone have any experience or recommendations? Thank you.

Monday 06/28/2021 | 2007 | Cayman S | Other | 270 views



Temperature Gauge Stopped Working

Saturday 06/26/2021 | 2000 | Boxster S | Engine | 135 views

My Temp gauge recently stopped working. All other gauges work great. The low Coolant indicator light also works. Any suggestions on how to trouble shoot, before purchasing a new Instrument panel?

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Temperature Gauge Stopped Working

Saturday 06/26/2021 | 2000 | Boxster S | Engine | 147 views

My Temp gauge recently stopped working. All other gauges work great. The low Coolant indicator light also works. Any suggestions on how to trouble shoot, before purchasing a new Instrument panel?

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Transmission mounts for G50 cars (964/993)

Tuesday 06/22/2021 | 1995 | 911 Carrera | Transmission/Clutch | 42 views

Hi Tony, Thanks for all your support for the 993 community. As the master mechanics who knew all this are retiring, it falls on a smaller community to keep these cars going. As an owner I just love driving this car and want to keep it at its best.I’m hoping you can use your contacts at Porsche to get some insight into what seems to be a mis-superseded part. I suspect this is nothing more than a data entry error.The part in question is 964-375-055-02, transmission mount for ...

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Re, a response from Pedro

Monday 06/21/2021 | 2008 | Boxster S | Engine | 123 views

Thank you, Pedro, for your rapid response to my asking about bore scoring possible in my 3.4-litre motor. You provided suggestions to minimize the likelihood. What I intended asking, though, is what response is called for once there is bore scoring? Is it always “fatal”? 

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Re, a response from Pedro

Monday 06/21/2021 | 2008 | Boxster S | Engine | 222 views

Thank you, Pedro, for your rapid response to my asking about bore scoring possible in my 3.4-litre motor. You provided suggestions to minimize the likelihood. What I intended asking, though, is what response is called for once there is bore scoring? Is it always “fatal”? 

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Replacing Mass Air Flow Sensor - '97 Boxster

Sunday 06/20/2021 | 1997 | Boxster | Electronics | 198 views

I have owned this '97 Boxster for 3 years from original owner.Very well maintained and all service records. The MAF Sensoris failing badly. It was cleaned 2,500 miles ago, but is nowidentified by flashing code and symptoms (hard start, unable tosmoothly idle, faltering acceleration, etc..)The R & R appears fairly straight-forward (2 star head screwsand 2 cables to disconnect/reconnect). Is that it? 1- Do the diagnostic codes have ...

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