Spark Plug Service at 30K - at what milage and what cost?
#1
Rennlist Member
Thread Starter
Spark Plug Service at 30K - at what milage and what cost?
Hi all,
I have 30K miles on my 2007 C4S with 15 or so track days under its belt. It's running perfectly fine with no issue, but I am now told to change the spark plugs. Questions:
1. Do I need it at this mileage, age?
2. How much does such service typically cost?
3. Anything else to do now, Serpentine belt, etc...?
Thanks!
I have 30K miles on my 2007 C4S with 15 or so track days under its belt. It's running perfectly fine with no issue, but I am now told to change the spark plugs. Questions:
1. Do I need it at this mileage, age?
2. How much does such service typically cost?
3. Anything else to do now, Serpentine belt, etc...?
Thanks!
#3
Rennlist Member
Thread Starter
#4
Advanced
SIX YEARS
$242 for me. $198 labor (2 hours) from my "indy" and $42 for 6 Bosch plugs from Amazon. Did mine at the six year mark even though I only had little under 30k miles on the car. No problems indicated. I just follow what the maintenance schedule states to be safe. IF I ever decided to sell shows someone I followed the recommended maintenance plan and took care of the car.
Last edited by ottobon100; 03-20-2017 at 05:43 PM. Reason: add info
#5
Rennlist Member
Thread Starter
#6
Rennlist Member
On my 2009, plugs are scheduled for replacement at 4 years or 40K miles (60K km), whichever occurs first. I'm about to hit 40K and will replace them in the spring. The dealer will probably quote replacing the coil packs also, which isn't necessary if no codes are being thrown, but might be worth doing since the labor is already covered.
Trending Topics
#8
Race Director
This is from combustion gases being forced into the thread. These gases are corrosive. The concern is not that the acid will eat the plug or even the head threads but that the corrosion -- if the plug is left in service too long -- will lead to head thread damage when the plug is removed. The head thread may be compromised that subsequent build up of corrosive compounds is accelerated due to the deterioration of the head threads. The plug threads obviously get renewed every time the plugs are replaced.
This is why in some cases there is a plug change schedule based on time.
In case someone thinks this might be the place to "save" some money and leave plugs in service longer than their change by time schedule, the plugs are the sacrificial item in the head/plug partnership as they are by far less expensive to replace than a head.
#9
Weissach did mine on a 2007 C4 (~30k km) in 2015. Cost 2.2 hours ($297 + tax at the time). I supplied the plugs (~$10 CAD each).
Have also done serpentine belt, which was quite worn at same mileage.
Have also done serpentine belt, which was quite worn at same mileage.
#10
Rennlist Member
Thread Starter
#11
My local Porsche dealer charges about $600 to change he plugs. I would also change the air filter and belt if this has not been done already. At one of PCA tech meetings held at this dealer, I was told by one of the dealer techs that they never had a problem removing plugs from a car due to age.
#12
Race Director
My local Porsche dealer charges about $600 to change he plugs. I would also change the air filter and belt if this has not been done already. At one of PCA tech meetings held at this dealer, I was told by one of the dealer techs that they never had a problem removing plugs from a car due to age.