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I would purchase a new ignition coil and have it ready to go as there is no warning when they decide to go south. This also just happened on my buddies GT3. My parts guy says he can't keep them in stock.
I just replaced the plugs on my new to me 991.2 gt3. It has 9000 miles and a lot of track time. The old plugs appeared to be in excellent condition. I highly doubt I gained anything by changing them other than the sense that I saved a few bucks not going to the dealer.
I am a silent partner in Elite Motor Cars Bend and we repair/service Porsche. My operating partner Garrick says it is not the plug degradation that it the concern it is the dissimilar metal corrosion that warrants the change.
interesting. Any way to determine if you are losing performance other than a dyno? In tuned applications you can look at timing advance and misfires...
I changed the plugs myself on my last .1 RS as they were the originals for 7k miles, 4 years including track use, right after the change the car felt more alive lower down and allot more drivable at low speeds with some top end punch.
I just changed them on my .2 RS but didn't see any different this time round, the ones I took out looked perfect and it was at 4k miles and 18 months old so perhaps they didn't need changing.
Just replaced mine at the 2 year mark. Less than 5000 miles during the 2 yr interval and I think it was a complete waste. The plugs look great. I was worried about difficulty to remove if not done but the whole job went so easily I don’t think that’s a problem either. I will not change them again for 10000 miles, probably 4 years.
I just changed mine for the 3rd time (every 6k miles and am at 18k now). It's so easy to do (less than an hour), relatively inexpensive ($150), and gives me peace of mind to keep everything from becoming difficult to separate (steel plugs in aluminum heads and the rubber coil boots from everything hot). Also gives me a chance to monitor the condition of the plugs (which can give indication of the condition of the motor) and I think it may be easier on the coils if the plugs are fresh.
That being said, I am inclined to think that this frequency of changing (every year) may be overkill for a 991.2 (everything has been looking perfect with minimal plug wear). I personally would never let it go over 2 yrs (factory schedule), but the 6k/1yr schedule probably not necessary unless you are using the car mostly on the track. I'll probably just keep to my schedule just because everything is going well
Torque spec for a fresh plug is 32NM or 24 Ft-Lbs and 25NM or 19 Ft-Lbs for reinstalling a plug (washer already crushed) - don't use any anti-seize, just dry.
I just changed mine for the 3rd time (every 6k miles and am at 18k now). It's so easy to do (less than an hour), relatively inexpensive ($150), and gives me peace of mind to keep everything from becoming difficult to separate (steel plugs in aluminum heads and the rubber coil boots from everything hot). Also gives me a chance to monitor the condition of the plugs (which can give indication of the condition of the motor) and I think it may be easier on the coils if the plugs are fresh.
That being said, I am inclined to think that this frequency of changing (every year) may be overkill for a 991.2 (everything has been looking perfect with minimal plug wear). I personally would never let it go over 2 yrs (factory schedule), but the 6k/1yr schedule probably not necessary unless you are using the car mostly on the track. I'll probably just keep to my schedule just because everything is going well
Torque spec for a fresh plug is 32NM or 24 Ft-Lbs and 25NM or 19 Ft-Lbs for reinstalling a plug (washer already crushed) - don't use any anti-seize, just dry.
Yes, I suspect that those that have the prongs burnt off the plugs before the 2 year interval have had major tuning/tinkering done with the engine to give it more power on the track. . .
02-10-2021, 12:38 PM
