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.

Why is front edge of hood suddenly out of alignment?

Friday 06/18/2021 | 2005 | Boxster S | Body | 24 views

I recently replaced several front suspension and steering parts and had the car professionally aligned. Since then, my hood has been intermittently having issues releasing via the electric latch, so I end up using the emergency release wire. I just noticed a few days ago that the right front edge of the hood is now out of alignment with the rest of the body (it's raised). This was not the case as recently as 1 week ago. What could be the cause of this? I have not been involved in any collisio ...

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How to address bore scoring?

Friday 06/18/2021 | 2008 | Boxster S | Engine | 15 views

The motor in my Porsche 987 Special Design 2 is a 3.4-litre. I am hearing of more such engines with Lokasil cylinder liners being afflicted by bore scoring. As I understand it, only a small percentage run into this catastrophic fate - but f I'm among them, what's my best response?

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Installing of the rubber bands to the door pockets

Friday 06/18/2021 | 1972 | 911E Targa | Body | 15 views

Hello Ed - Do you have a diagram or information on how the rubber bands connect to the door pockets. When I got the car back from the painter they were not installedThanksAnthony Capone

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Where is the low pressure AC fitting ?

Thursday 06/17/2021 | 1984 | 944 | Heating and Ventilation | 42 views



"Sweet" odor when air conditioning is on.

Thursday 06/17/2021 | 2018 | 718 Cayman | Heating and Ventilation

I get a "sweet" odor when the air conditioner is on. The smell is similar to what you get when you open the port to add coolant. 2nd annual service was done two weeks ago. Any ideas would be helpful.Thanks,Steve

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Do I need to flush my coolant system with water after a change the water pump following a failure? There is a small amount of dark particulate inside the housing.

Monday 06/14/2021 | 2001 | Boxster | Engine | 123 views

The engine did not overheat due to the failure and although the vehicle was driven "very spiritedly" to the PCA swap meet, it did not appear to sustain any damage. The engine has had the IMS bearing serviced and the RMS replaced. If I need to flush the engine with water, should I use distilled water for a flush. I know it can be quite corrosive in some situations. I am thinking deionized water might be safer ...

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I am looking at pruchasing a 2003 Boxter. The clutch will only disengage when the clutch pedal is pushed in to the maximum travel distance. Do I need a clutch adjustment or clutch replacement?

Monday 06/14/2021 | 2003 | Boxster S | Transmission/Clutch | 114 views



Can I install a plastic one in place of the glass using the old top?

Sunday 06/13/2021 | 2002 | Boxster | Interior/Upholstery | 108 views

I have a convertible with the glass top, and was told I have to replace the whole she-bang. However, can I substitute or install a plastic window in lieu of the glass using the existing top?

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My heated seats aren't working?

Sunday 06/13/2021 | 2006 | Boxster | Heating and Ventilation | 102 views

Just purchased this Boxster second hand from a member. Love the car. My heated seats aren't working and neither is my CD player. I think he may have just replaced the battery before shipping the car to me. I read something about changing the battery might clear the codes for the heated seats and the stock CD player? What do I do? I'm 4 hours from a Porsche dealer.Thank you.

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Coolant Valve

Sunday 06/13/2021 | 2006 | Cayman S | Transmission/Clutch | 87 views

I have a 2006 CaymanS purchased 4 years ago with 19K miles, weekend driver no track time. I have replaced the Tiptronic coolant valve 3 times since purchased. Now at 33K miles its leaking again. This will be the 4th valve in roughly 14,000 miles. Is this normal? I have been buying from a reputable supply house. I have been unable to find anything but the moulded plastic version. Thanks

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rear light assemblies

Monday 06/07/2021 | 1972 | 911E | Electrical | 135 views

Hello Ed - I just got my car back from the painter - When checking the lights I pressed the emergency flasher. The left rear light had different lamps li than the right side. I took the assembly's apart and tried to confirm the wiring.I also don't know what lamps light for running, parking lamps and blinker lamps.I tried using the manual wiring diagram put was very difficult to understandAny help would be appreciated because I can't drive the car or pass inspection ...

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Clean small rocks from front fan housing using just a hose.

Monday 06/07/2021 | 2015 | Boxster GTS | Other | 66 views

Hi Pedro..thx for your reply….sorry I should have been more clear. My radiators are spotless no debris and look new. No rain ever and of course no winters and they are vacuumed and rinsed regularly. so… Can I run a low pressure flood of hose water up thru the bottom vents of the fan housing and simply wash the small rocks out. I believe this will work but would love your thoughts. I wont damage anything but I am assuming the fans can and do get wet. ...

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Are there plans for a PCM+

Saturday 06/05/2021 | 2013 | Boxster | Electronics | 54 views

I send a question to Porsche of American to see if there are any plans for the PCM upgrade to the PCM+... If not is there a recommended after market replacement?

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1988 924s engine stars but stalls within seconds

Saturday 06/05/2021 | 1988 | 924S | Fuel System | 213 views



How to clean small loose rocks from front fan housing?

Friday 06/04/2021 | 2015 | Boxster GTS | Other | 111 views

How can I clean 1/4” - 3/8” rocks from my front radiator fan housing? There are so many the fan blade contacts them occasionally.

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When the ambient temperature exceeds 80-85 degrees, my passenger side window will not go up or down. This only occurs when it is hot outside. If I pull in my garage and let the door panel cool for 45 minutes or so, the window works fine again. Is it the switch, the window motor or regulator? Thank you.

Friday 06/04/2021 | 1999 | Boxster | Electrical | 177 views

Cell # 9736700057

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Cold Start Smoke and Idle Ticking noise

Wednesday 06/02/2021 | 2006 | Boxster | Engine | 498 views

Hi,I recently bought a 2006 987.1 S (very high mileage).I got 2006 specifically to avoid both IMS (affected mostly 2005) and bore scoring (affected mostly 2007+). It seems to drive beautifully. But when a cold start is done (even if car was driven previous day), there is an instant puff of white/blueish smoke. This smoke disappears quickly. Also I notice a slight ticking noise from the engine while it is idling. It allegedly has had a very recent oil change, and re ...

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Why do my rear brake become excessively hot after on a short ride?

Wednesday 06/02/2021 | 2018 | 718 Cayman S | Brakes | 132 views



I have a set of Boxster wheels 996 362 124 00 and 996 362 126 05, they are 17 inch x 7 (offset 55) and 17 x 8.5 (offset 50) inch respectively

Tuesday 06/01/2021 | 1992 | 968 Cabriolet | Wheels and Tires | 156 views

I believe these wheels with 215/45/17 and 245/40/17 tires will fit my 1992 968, it currently has 16 inch wheels. I figure it may require a 10 mm spacer on the front (to get to the “from the factory” 65 mm offset for 17 inch wheels front) and 5 mm spacers to get to the factory supplied rear (55 mm) offset with 17 inch wheels. Have I gone the right way in calculating offsets? Is there another reason why these wheels would not fit? Thank you for your help! ...

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94 968 Third Brake Light Inop

Saturday 05/29/2021 | 1994 | 968 | Electrical | 48 views

My third brake light is inop. Any suggestions regarding where to begin troubleshooting?

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94 968 Third Brake Light Inop

Saturday 05/29/2021 | 1994 | 968 | Electrical | 165 views

My third brake light is inop. Any suggestions regarding where to begin troubleshooting?

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Is there a way to connect the TrackPrecision App even if I don't have the GPS in the car ?

Friday 05/28/2021 | 2020 | 718 Cayman GT4 | Electronics | 27 views

What options are required to be able to connect the app ? Thanks !

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What aftermarket ECUs work with/are commonly used with Porsches?

Friday 05/28/2021 | 2001 | Boxster S | Electronics | 54 views

2001 porsche 986 boxster S w/manual transmission - Looking at Haltech tuners - was looking for a recommendation on which ECU would suit my needs?* Primary purpose for my 986 is learning - DIY preferred and i look at working on the 986 as a hobby.  * Gauges and data that an aftermarket ECU can provide are very appealing* I don't (yet) plan to track the car, it's a weekend fun car* looking to maximize fuel efficiency and pe ...

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How can I increase the power and torque in my 2013 Boxster to match that of its stablemate, the Cayman?

Thursday 05/27/2021 | 2013 | Boxster | Engine | 45 views

I have a base Boxster (fully loaded with the Sport Chrono package). It has the 2.7 liter flat 6 which is listed at 265 bhp with 206 lbs/ft of torque. The same engine in the Cayman is rated at 275 bhp and 213 lbs/ft of torque. What are the differences that account for the 10 bhp and 7 lbs/ft torque boost in the Cayman, and how can I get the same power from my Boxster?

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Battery issues, New batteries no excessive amp draws found. Car dead after one week of non use.

Sunday 05/23/2021 | 2002 | Boxster S | Electrical | 222 views

Did amp draw test , showing about.0004 milliamp draw seems normal. Did fuse test no problem detected.Could it be type of new battery AGM? from Autozone?Car is parked 16hrs battery down to 11.33V Battery connected .. Nothing on Alarm not set. Any Thoughts?Will continue to monitor battery and switch out battery ( w good one) and retest.

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Battery issues, New batteries no excessive amp draws found. Car dead after one week of non use.

Sunday 05/23/2021 | 2002 | Boxster S | Electrical | 237 views

Did amp draw test , showing about.0004 milliamp draw seems normal. Did fuse test no problem detected.Could it be type of new battery AGM? from Autozone?Car is parked 16hrs battery down to 11.33V Battery connected .. Nothing on Alarm not set. Any Thoughts?Will continue to monitor battery and switch out battery ( w good one) and retest.

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1987 911 Rubbing/ “hum” noise heard pulling away from stop

Friday 05/21/2021 | 1987 | 911 Carrera Targa | Brakes | 108 views

Hi guys, My 1987 Targa recently started making a strange “humming” noise from the front drivers side (the only way I can think to describe it). It happens after braking and only when I am accelerating from a stop. It only lasts a couple of seconds and I can sometimes feel a very slight vibration in the steering wheel also . The brakes pads were changed about 3,000 miles ago. it drives straight and no vibrations whatsoever while at speed .

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1987 911 Rubbing/ “hum” noise heard pulling away from stop

Friday 05/21/2021 | 1987 | 911 Carrera Targa | Brakes | 117 views

Hi guys, My 1987 Targa recently started making a strange “humming” noise from the front drivers side (the only way I can think to describe it). It happens after braking and only when I am accelerating from a stop. It only lasts a couple of seconds and I can sometimes feel a very slight vibration in the steering wheel also . The brakes pads were changed about 3,000 miles ago. it drives straight and no vibrations whatsoever while at speed .

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968 Crack in Firewall

Friday 05/21/2021 | 1993 | 968 | Body | 186 views

Have you heard of this issue on 968s and 944s and 924s? If so, what is the recommended fix and ballpark cost?

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968 Crack in Firewall

Friday 05/21/2021 | 1993 | 968 | Body | 153 views

Have you heard of this issue on 968s and 944s and 924s? If so, what is the recommended fix and ballpark cost?

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Oversize Tires on a 944S2

Friday 05/21/2021 | 1989 | 944 S2 | Wheels and Tires | 138 views

I’m hoping you can help . . .I bought an ’89 944S2 coupe that came with a couple sets of wheels/tires. Will 245/45x16 tires mounted on 8Jx16 wheels with a 52.3mm offset fit on the front of my car without interference issues? I see in the owner’s manual that that same size tire mounted on 9Jx16 wheels with a 60mm offset will fit the rear of a turbo. Will that combo but with a 52.3mm offset fit on the rear of my S2? ...

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Oversize Tires on a 944S2

Friday 05/21/2021 | 1989 | 944 S2 | Wheels and Tires | 102 views

I’m hoping you can help . . .I bought an ’89 944S2 coupe that came with a couple sets of wheels/tires. Will 245/45x16 tires mounted on 8Jx16 wheels with a 52.3mm offset fit on the front of my car without interference issues? I see in the owner’s manual that that same size tire mounted on 9Jx16 wheels with a 60mm offset will fit the rear of a turbo. Will that combo but with a 52.3mm offset fit on the rear of my S2? ...

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Best Tires for my car

Thursday 05/20/2021 | 2001 | Boxster S | Wheels and Tires

Looking for Summer Performance Tires for the Boxster S - Recommendations on what tires will be best

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2005 Boxster-S, 68000 miles. GPS shows location 40 miles away from actual location. How to fix?

Wednesday 05/19/2021 | 2005 | Boxster S | Electronics | 240 views

Navigation GPS shows location 40 miles away from actual location. How to reset?

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2005 Boxster-S, 68000 miles. GPS shows location 40 miles away from actual location. How to fix?

Wednesday 05/19/2021 | 2005 | Boxster S | Electronics | 75 views

Navigation GPS shows location 40 miles away from actual location. How to reset?

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What is the life span of the belt that drives the MFI pump? Mine is old in years; although not miles. Should it be replaced as a precaution?

Tuesday 05/18/2021 | 1972 | 911T Targa | Engine | 183 views

Engine rebuild was done many years ago, but has only about 25k miles since.

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What is the life span of the belt that drives the MFI pump? Mine is old in years; although not miles. Should it be replaced as a precaution?

Tuesday 05/18/2021 | 1972 | 911T Targa | Engine | 90 views

Engine rebuild was done many years ago, but has only about 25k miles since.

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looking for repair of wheel rims

Monday 05/17/2021 | 2018 | 718 Cayman S | Wheels and Tires | 261 views

I have two wheel rims that have been scratched up and need repair. I know the dealership in Louisville can take care of it, but i would to have them repair here in Lexington. Any suggestion on who and where to take them.Thanks,Adam

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looking for repair of wheel rims

Monday 05/17/2021 | 2018 | 718 Cayman S | Wheels and Tires | 108 views

I have two wheel rims that have been scratched up and need repair. I know the dealership in Louisville can take care of it, but i would to have them repair here in Lexington. Any suggestion on who and where to take them.Thanks,Adam

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Brake fluid change, see below, Thank you!!!

Saturday 05/15/2021 | 2014 | Cayman S | Brakes | 291 views

Hi all car folks. Hope the Spring is treating you and your "drives" well! I am about to embark on a brake fluid change on my '14 Cayman S.Curious if someone can recommend a good brake fluid that has a color to it so I can tell when all the fluid has been changed. I am novice once per year driver so don't need anything super high tech. Any idea what size container I need for a full brake fluid change including manual transmission slave bleed??? Do we use same type fluid for slave and ho ...

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Brake fluid change, see below, Thank you!!!

Saturday 05/15/2021 | 2014 | Cayman S | Brakes | 174 views

Hi all car folks. Hope the Spring is treating you and your "drives" well! I am about to embark on a brake fluid change on my '14 Cayman S.Curious if someone can recommend a good brake fluid that has a color to it so I can tell when all the fluid has been changed. I am novice once per year driver so don't need anything super high tech. Any idea what size container I need for a full brake fluid change including manual transmission slave bleed??? Do we use same type fluid for slave and ho ...

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My AC is not working - local shop found a leak and repaired but still won’t work and to add to the issue the heat comes on at random times and even when I close the vents heat comes through so car interior is hot!

Saturday 05/15/2021 | 1991 | 911 Carrera 2 | Heating and Ventilation | 84 views



My AC is not working - local shop found a leak and repaired but still won’t work and to add to the issue the heat comes on at random times and even when I close the vents heat comes through so car interior is hot!

Saturday 05/15/2021 | 1991 | 911 Carrera 2 | Heating and Ventilation | 525 views



I have a 993 Turbo, my ABD light comes on occasionally, what can be the cause?

Wednesday 05/12/2021 | 1996 | 911 Turbo | Brakes | 72 views



I have a 993 Turbo, my ABD light comes on occasionally, what can be the cause?

Wednesday 05/12/2021 | 1996 | 911 Turbo | Brakes | 45 views



Diagnose turn signal and hazzard tight

Wednesday 05/12/2021 | 1984 | 911 Carrera Cabriolet | Electrical | 135 views

Replaced the column switch and the lights don't work. The headlights are working fine

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Diagnose turn signal and hazzard tight

Wednesday 05/12/2021 | 1984 | 911 Carrera Cabriolet | Electrical | 45 views

Replaced the column switch and the lights don't work. The headlights are working fine

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I'm attempting to remove my voltage regulator which looks to be very straightforward but it hangs up on something after 1/4 inch or so. Bolts are removed and wires disconnected. Am I missing something?

Wednesday 05/12/2021 | 1983 | 911 SC | Electrical | 102 views



I'm attempting to remove my voltage regulator which looks to be very straightforward but it hangs up on something after 1/4 inch or so. Bolts are removed and wires disconnected. Am I missing something?

Wednesday 05/12/2021 | 1983 | 911 SC | Electrical | 54 views



I need to ship my wife's Cayman S across country. Can someone recommend a reputable shipping company for enclosed transport? Thank you.

Wednesday 05/12/2021 | 2019 | 718 Cayman | Other | 105 views

Just looking for a vehicle transport company that will take good care of the car and try to charge me on the front and back end.

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