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.

How to recharge A/C on 1984 944 any recommended shops in North NJ

Today | 1984 | 944 | Other

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Where is the blower motor thermo-fuse?

Sunday 06/09/2024 | 2015 | Boxster GTS | Heating and Ventilation

Thanks for the suggestion - looked through multiple part diagrams for my 981 Boxster and do not see a thermo-fuse for my blower motor. Is it in the blower motor unit? Is there a possibility that either the temperature sensor for the blower outlet (970-653-253-00) or evaporator (970-653-257-00) is causing my blower to stop functioning under longer periods of usage (fan on low or mid) or short periods (fan on high), since it hit a certain (high) temperature? Or did my service technician insta ...

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What does my blower stop intermittently?

Sunday 06/09/2024 | 2015 | Boxster GTS | Heating and Ventilation

Hi,My blower in the cabin wouldn’t turn off after I turned off the engine (had to pull the fuse to stop from draining my battery). Service recommended and replaced the blower motor regulator. It resolved my problem but now my blower stops either under long run times or blowing on high for a short term. Service doesn’t believe it’s the motor since it runs, shuts off and is ok after restarting the car. No fault codes either. Any recommendations? Thanks in advance for your help. ...

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Not a question- but an answer- in the April 2024 issue there was a question about the seatbelt not retracting on a 2006. Boxster. I have the same car and it had same issue. The belt is dirty and needs to be cleaned. Sounds too easy, but pull on the belt like you normally would and use a cleaner as you

Friday 06/07/2024 | 2006 | Boxster | Accessories

Not a question- but an answer- in the April 2024 issue there was a question about the seatbelt not retracting. I have the same car. The belt is dirty. Seems simple, but pull on the belt all the way and use a cloth with cleaner on it as it retracts. Repeat 3-4 times and it will start to stick again. Crazy but it works.

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Not a question- but an answer- in the April 2024 issue there was a question about the seatbelt not retracting on a 2006. Boxster. I have the same car and it had same issue. The belt is dirty and needs to be cleaned. Sounds too easy, but pull on the belt like you normally would and use a cleaner as you

Friday 06/07/2024 | 2006 | Boxster | Accessories

Not a question- but an answer- in the April 2024 issue there was a question about the seatbelt not retracting. I have the same car. The belt is dirty. Seems simple, but pull on the belt all the way and use a cloth with cleaner on it as it retracts. Repeat 3-4 times and it will start to stick again. Crazy but it works.

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are the a/c fan supposed to come on when the compressor turns on? Thanks, Dave

Thursday 06/06/2024 | 1997 | Boxster | Heating and Ventilation

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Has anybody had Vision Motorsports rebuild an engine for them? I am considering having them rebuild mine.

Wednesday 06/05/2024 | 2005 | 911 Carrera S | Engine

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I want to add PSE button and control to 2014 Cayman S but use it attached to a valved soul performance muffler set up.....I cant seem to find the button, wiring, vacuum lines etc WITHOUT buying a complete PSE system including the mufflers....any ideas?

Tuesday 06/04/2024 | 2014 | Cayman S | Performance Modifications

really want a more aggressive exhaust system/sound but maintain a stock look in the cabin and not have to use a FOB

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Smell of burned plastic/rubber/oil

Tuesday 06/04/2024 | 2016 | Cayman GTS | Engine

When parking my 2016 Cayman GTS (manual) with the engine hot, there is a strong smell of burned plastic/rubber/oil. I brought the car to my Porsche dealer and was told the smell is normal. They did confirm there are no oil leaks. I previously owned a 2015 Cayman GTS (manual) which had the same smell, maybe not as intense. That car eventually got a new engine and the smell was gone. The smell does not make it into cabin. What could be the cause for the smell? thank you ...

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Cabriolet header latch adjustments?

Monday 06/03/2024 | 1994 | 968 Cabriolet | Body

As you perhaps can tell from the attached photo, the cabriolet latch posts are off-center, making it extremely difficult to attach the latch handles correctly. In addition, the latches do not tightly secure the top to the windshield header, allowing the tap to rattle over bumps. The latch posts were closer to center and tighter when I purchased the car 3 years ago but they have slowly moved out of position to the point where it is close to impossible to correctly seat the latch handle. Is the ...

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How to replace the rear quarter panel gravel guards

Sunday 06/02/2024 | 2011 | Boxster S | Body

The gravel guards ( located in front of the rear wheels ) appear to be adhered to the guarter panel with some form of adhesive.If that’s accurate, what’s the Porsche recommended procedure for removal of the old and installation of the new.

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Am I able to swape out my 3.6L to a 3.8L Turbo?

Saturday 06/01/2024 | 2006 | 911 Carrera 4 Cabriolet | Engine

I currently have the stock 3.6L engine in my 2006 997 CAB 4. It runs and drives great, but I would enjoy having the extra power without having to buy another vehicle. It is currently very sluggish off the line, especially in first gear (manual) as I enter about 4K rpm (it drops off), but very quick at higher speeds in 4 through 6 gears. I'd rather just do an engine swap and add turbo if possible. Any answers and recommendations, including where to get the work completed and approximated cos ...

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Porsche Certified Boxster was to come with two keys, dealer only supplied one. Where can I obtain a second?

Thursday 05/30/2024 | 2014 | Boxster S | Accessories

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HOw difficult is it to replace the DME? The dealer wants $7000 !!!! I found the unit online of under $300 , just don't know where it is located.

Thursday 05/30/2024 | 2006 | 911 Carrera S | Electronics

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My front lower lip spoiler is constantly hitting when going up a driveway or over a speed bump. Is there a lift kit available like the newer models have?

Thursday 05/30/2024 | 2006 | 911 Carrera S | Suspension

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When I asked my question this past Wednesday I was not specific enough. Is there a way to check the power steering level without putting the top in the service position, removing the the carpeting and panels from the top and the area behind the seats.

Thursday 05/30/2024 | 1997 | Boxster | Suspension

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I saw a 2008 Cayman for sale for $5000. The comments say “Blown engine, good transmission “. My son thinks this might be a good project car. Should we walk away, go look at it, ask specific questions? I have no idea how I would verify that the transmission is “good” without being able to drive it. Any thoughts? Many thanks. Chris

Wednesday 05/29/2024 | 2008 | Cayman | Engine

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is there an easy way to check the power steering fluid level?

Wednesday 05/29/2024 | 1997 | Boxster | Suspension

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The Chrono clock in the center of my dash intermittantly goes out for months at a time and then suddenly reactivates with the correct time and illumination. Why does this happen and how can I fix it? I've tried researching the web/YouTube and read the manual extensively and I've not discovered the solution. Maybe an electrical "short"? A bad fuse? ?

Tuesday 05/28/2024 | 2014 | Cayman S | Electrical

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The latch that relseases my front hood won't budge, how do I unfreez it?

Tuesday 05/28/2024 | 1999 | 911 Carrera | Cables and Controls

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driver side window quit working on 89 930 cabriolet. could it be the passenger switch as opposed to the window motor?

Sunday 05/26/2024 | 1989 | 911 Turbo Cabriolet | Body

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where is the idle setting located on a fuel injected 1975 914 2.0?

Saturday 05/25/2024 | 1975 | 914 2.0 | Engine

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I’m in need to have my 2 climate control toggles replaced I’m looking for a good shop near Vonore TN

Saturday 05/25/2024 | 2007 | 911 Carrera 4S | Electronics

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944 gas gauge

Thursday 05/23/2024 | 1987 | 944 | Fuel System

The gas gauge is not working

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I noticed that Porsche now offers a Porsche Classic Communications Management System plus. How much do dealerships charge to install these units and what is your opinion of them?

Thursday 05/23/2024 | 2008 | 911 Carrera S | Electronics

The latest PCCM plus system seems to offer more flexibility and options for 997.1 911's. How difficult is it to be installed and what is the average installation costs for Porsche service centers to do this? In your opinion is this worth the cost to invest in?

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Interpreting results of compression & leak-down test on 944 S2

Wednesday 05/22/2024 | 1990 | 944 S2 Cabriolet | Engine

I'm planning to sell my 1990 944 S2 Cabrio and there's always curiosity on the auction sites about compression and leak-down test results. A 944 Tech Q&A on 7/5/2010 expressed skepticism about leak-down tests. I had one done in January of this year (2024): compression was 170, 175, 165, & 175 and leak-down 10% except cylinder #3 was 20% (151.3k miles). The shop said the results were "fine". But is #3's 165 & 20% "fine"? (Cylinder #4 is a champ!)FYI: My previous compression ...

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Does the 944's timing belt still need replacement every 5 years or 25k miles?

Wednesday 05/22/2024 | 1990 | 944 S2 Cabriolet | Engine

When first launched, Porsche said the 944's timing belt was a lifetime part. We know how that worked out. So, since purchasing my 1990 944 S2 Cabriolet from Vasek-Polak in August 1990 I've adhered to the 5-year/25k mile replacement rule. I've had it done eight times now, including at least once by Tech Q&A's Tony Callas (9/15/1994). But is this still the recommendation or has Porsche finally improved the belts enough to last longer? (Or more than 6yrs/30k as last mentioned i ...

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I put a down payment on a new 911 targa 4s dose that guarantee I will get an allotment at some point?

Wednesday 05/22/2024 | 2006 | 911 Carrera S Cabriolet | Other

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Instrument surround for a 1975 Carrera?

Wednesday 05/22/2024 | 1975 | 911 Carrera 2.7 (Euro) | Interior/Upholstery

The area surrounding the instruments/guages on my dashboard was painted at some point during a prior restoration and I would like to restore it to its original specification. Was the original surface vinyl? If so, does anyone have a source for that material?

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Has anyone had the issue of a left rear strut rubbing on the exhaust on a G Series 911 Carrera? The Dealer is trying to figure out why. They replaced the motor mounts but that did not solve the issue. Any thoughts?

Wednesday 05/22/2024 | 1986 | 911 Carrera Cabriolet | Suspension

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Back up light switch

Tuesday 05/21/2024 | 2003 | 911 Carrera Cabriolet | Electrical

what is the cost to replace the backup light switch in 2003 911 tiptronic? Dealer quoted outrageous price citing labor cost to remove center console to get to it. Other sources say easy job and switch can be accessed with out a lift from underneath. 20 minute job. Who can I believe and what should i expect to pay for part and service?

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Stock Fuel Injection vs aftermarket Carburetor performance in mountain - altitudes (above 5000').

Tuesday 05/21/2024 | 1974 | 914 1.8 | Performance Modifications

Im looking to buy a 914 to restore for use as a fun / casual vehicle, Many of these vintage cars it seems have been modified to use carburetors in lieu of original EFI, Mech F Injection etc. My desire is to take short trips from sea level - to some limited Mountain driving to altitude of around #5550 ft. Aren't the stock Fuel Injection cars better for this type of driving? I'm trying to stay as original as possible but have a "driver" for recreation. Thanks! FDW ...

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2001 996 Cab interior lights come on when driving and I hit a bump in the road. If I slam the top of the driver's door at the door handle the lights dim and go out. What is the fix?

Tuesday 05/21/2024 | 2001 | 911 Carrera | Electrical

All of a sudden the car developed this issue. If I am driving along and hit a bump in the road, all of the interior lights come on. If I smack the top of the driver's side door by the handle, most of the time the lights will dim and go off. Sometimes if I hit another bump in the road, the lights will dim and go off. Could it be any of the electrical relays on the door handle or within the door lock mechanism? ...

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Top Does Not Fully Retract

Tuesday 05/21/2024 | 2014 | Boxster S | Other

The top stops retracting about 7 inches before it would be fully retracted. When I close it, it continues to open and almost completes before starting to close. When it reaches vertical it stops but I can still hear the motor, when I reach up and give it a slight pull it closes completely. Thank you for any suggestions.Lee

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What are the front and rear alignment specifications for street usage?

Sunday 05/19/2024 | 2015 | Cayman GTS | Wheels and Tires

I am about to replace my tires (all four) and want to have the front and rear alignment checked. I need the specs so that whatever shop does the work will do it properly (caster, camber, toe-in, etc).

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On locking car with remote/key double-beep -- how to solve? Thank you

Friday 05/17/2024 | 2015 | Boxster S | Electronics

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Hi! My 1970 911T when at idle - makes a slight howling or whirring sound arising from underneath area- I’m guessing the transmission area. It’s a 4-speed. When I depress clutch and hold the pedal down/ the noise stops. Transmission seems lately to be a little noises when driving at fine gears. Shifts ok. Counselor this be symptom of worn synchros? Rebuild time or just replacing a couple of synchros? Thx! FDW

Friday 05/17/2024 | 1970 | 911T | Engine

Car was a converted Sporto to 4 speed manual trans in the 70s before I purchased it.

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Is there any solution for a noisy Targa top?

Friday 05/17/2024 | 2002 | 911 Targa | Interior/Upholstery

I love my 996 Targa but the squeaking and rattling of the glass roof when driving rough or uneven roads can be annoying. I’ve been told by several mechanics that the noise associated with the Targa top is “just something that you gotta live with.” Please tell me there’s a remedy to eliminate the unwanted noise.

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Need help with wheels and tires.

Thursday 05/16/2024 | 1999 | 911 Carrera | Wheels and Tires

When I bought this it had 19" wheels and rims, that were pretty road rash'd. I went to a place that sells wheels and rims and I purchased some new ones, but I was concerned about the offset, they guaranteed these would work but I see rubbing on the new tires. I believe it originally came with 18" and at this point am ready to spend the couple thousand dollars getting it right. Can anyone tell me what the OEM specs were for it. The VIN is READ ANSWER

Ticking sound, brass shavings in my oil.

Wednesday 05/15/2024 | 2005 | 911 Carrera S | Engine

I had a rebuild 7 years ago after the IMS exploded. Now 7 years later with only 20k on the clock the shop that rebuilt the engine did a routine oil change to find brass shavings in the oil. There is also a ticking sound. I don't track the car and I let it warm up. I want to keep the car but am unsure what to do. Some of the shops are saying worst case is to buy a Porsche short block and swap everything over onto that. The other opinion is to buy a used engine but if I do that who's to say tha ...

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Adjusting Alternator Housing Position?

Wednesday 05/15/2024 | 1984 | 911 Carrera | Engine

What is the technique for adjusting Alternator Housing for correct distance from the alternator pulley? Books I have don’t have directions for adjusting the space at the pulley, only for changing the alternator.Can the Alternator Housing cause temperature to go up and reduce oil pressure as it makes contact with the pulley causing a binding ?Engine temp ran hot between top line and red bar. I shut the engine down for a few minutes and separated the pulley from the housing ...

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over rev report

Tuesday 05/14/2024 | 2006 | 911 Carrera S | Engine

Hi,can the higher over revs below be a shift mistake or do they look like driving behaviour? Thanks!! Number of ignitions, range 1 (h) 41904 / 1347.2 Number of ignitions, range 2 (h) 3141 / 1347.2 Number of ignitions, range 3 (h) 620 / 1346.5 Number of ignitions, range 4 (h) 25 / 1151.2 Number of ignitions, range 5 (h) 2 / 1151.2 Number of ignitions, range 6 (h) 2 / 1151.2 Operating ...

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Is there any solution for a squeaky Targa top?

Tuesday 05/14/2024 | 2002 | 911 Targa | Interior/Upholstery

I love my Targa but the squeaking noise when driving over bumps and uneven roads can be annoying. I’ve found it difficult to find a mechanic willing to work on the Targa top, I was told it’s because they aren’t very common. Can the top be tightened or lubricated to eliminate the noise? I appreciate any and all advice.

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installed wheel studs. the loctite is curing. when i put the wheels back on tomorrow, what should i torque the lug nuts at? I torqued the lug bolts at 119 ft/lbs. Is it the same? thank you

Monday 05/13/2024 | 2018 | 718 Boxster S | Wheels and Tires

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1986 Porsche 944 Turbo Option code M60

Monday 05/13/2024 | 1986 | 944 Turbo | Other

I am looking at a 1986 Porsche 944 Turbo for sale and it has an option code on the sticker M60. I have checked everywhere to see what this translates to and I am unable to find this anywhere. He says it has factory adjustable koni shocks.Any assistance is greatly appreciated.Chad

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My oil temp normally runs at 200-205° F. Today after engine is warmed up it will not go higher than 175°. Water temp is normal at 175°F. Shows full oil when level is checked. I am totally puzzled. Outside temps are low 80’s. Not familiar with AOS issues so in the dark as to why such low temp.

Sunday 05/12/2024 | 2006 | 911 Carrera S Cabriolet | Engine

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Fuel leak

Sunday 05/12/2024 | 2006 | 911 Carrera Cabriolet | Fuel System

After the tank is full, car uses 10 gallons of fuel in 50 miles. Engine runs fine, no check engine light, MPG indicator shows normal 17 MPG. Usage verified by refill so it is not a gauge issue. No gas smell or visible leakage under car.

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I have a non metallic sounding rattle behind the drivers left ear on less than perfect roads.

Saturday 05/11/2024 | 2007 | Cayman S | Interior/Upholstery

A very annoying and persistent non metallic sounding rattle behind the drivers left ear on road surfaces that are not perfectly smooth. I press on the head liner but the noise is still there. I have checked for obviously loose pieces of trim and all is tight. I have not removed the engine cover or anything else.

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What causes both turn signal indicators on gauge to dim & both flicker while at 1100 RPM idle with foot on brake pedal.

Saturday 05/11/2024 | 1970 | 911T | Electrical

Electrical gremlin. With engine idling at 1100 RPM, with either L or R turn signal activated, the appropriate L or R indicator light flashes on gauge. However, when I have my foot on brake pedal (as stopped in traffic) - suddenly signal indicators go dim and both weakly with flicker simultaneously (not strong dual flashes as hazard lights do.) I experimented by revving the engine a little with gas pedal or hand throttle --to boost RPM and the signal indicators suddenly ...

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How to remove smaller odometer adjustment cable from speedometer

Saturday 05/11/2024 | 1970 | 911T | Cables and Controls

My 1970 911T needs the trip meter repaired so my speedometer will be mailed out for service. Re the two speedometer cable connections - how do I (1) uncouple the trip meter smaller cable in the back of the speedometer? Is it a press-fit? I prefer to do this as opposed to unscrewing the adjustment knob set screw the dash. (2) Also, aside from disconnecting electrical connections which seem very straightforward, the main larger cable is an unscrewing process for removal? Thanks. ...

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