991 common problems and failures. Reference guide.
Racer
Joined: Jul 2020
Posts: 444
Likes: 128
From: Toronto
was it dripping coolant? belt supposed to be changed at 6 year mark?
Rennlist Member
Joined: Sep 2006
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From: Alabama
yes, inspect at 40K/4 years and replace at 60k/6 years. I have over 100k on my 50th Anniversary and I hav changed the belt twice at the replace interval because spark plugs/air filters are due at the same belt inspection interval so it is worth just replacing at 40K/4 year.
Racer
Joined: Jul 2020
Posts: 444
Likes: 128
From: Toronto
yes, inspect at 40K/4 years and replace at 60k/6 years. I have over 100k on my 50th Anniversary and I hav changed the belt twice at the replace interval because spark plugs/air filters are due at the same belt inspection interval so it is worth just replacing at 40K/4 year.
Oddly for 991.2, the 6 year service has belt alone. Makes sense to do it with the air filter since your almost at it anyways.
Rennlist Member
Joined: Sep 2009
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From: Canada & the Alps
Rennlist Member
Joined: Sep 2009
Posts: 8,687
Likes: 785
From: Canada & the Alps
Track Day
Joined: Mar 2023
Posts: 24
Likes: 6
From: Bucks County, PA
It wasn’t dripping, but whatever fluid is contained inside the wheel was leaking. You can sort of see it in the picture. It was noticed on a regular service interval. I was well past the six year mark and it should have been done sooner. (I bought the car when it was just turning eight.) The mechanic had previously told me it was the original but was in good shape at the time.
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Instructor
Joined: Aug 2020
Posts: 124
Likes: 19
From: Senoai Ga
inside door panel separation from window 9both sides) on 991.1 ; 991.2 and perhaps 992.
there is a FB dedicated to solutioning this issue. See Pedro in Florida. He has had great success with repairing. Door cards replacement gives temporary solution however due to glue and door structure will occur again. Pedro has been the best overall solution. I have notified an official who works for PCNA and lives in my area. He stated he would look into this issue. Its a very big issue.
there is a FB dedicated to solutioning this issue. See Pedro in Florida. He has had great success with repairing. Door cards replacement gives temporary solution however due to glue and door structure will occur again. Pedro has been the best overall solution. I have notified an official who works for PCNA and lives in my area. He stated he would look into this issue. Its a very big issue.
Last edited by bill edwards; Mar 12, 2024 at 11:15 PM.
Instructor
Joined: Dec 2013
Posts: 231
Likes: 4
From: Pismo Beach, CA
Rennlist Member
Joined: Jan 2021
Posts: 1,282
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From: Phoenix
2017 911 sit 2 Service Information
QUOTE=Car25;19380219]At 10,000 miles my 2015 C2S had a scored bore so PCNA replaced my engine in 2016.[/QUOTE]
This is the first I remember hearing about bore scoring in the 9A91 engine. Are you a .1? I think so.. Were there other factors? How was the gas mileage before this happened? Anything to indicate fouled injectors? DI is the root cause. The reason for the .1 question is that Porsche moved the injector more central in the .2 bore. The injectors are blowing off the cylinder oil film if they get dirty, poor gas, etc.
Instructor
Joined: Aug 2020
Posts: 124
Likes: 19
From: Senoai Ga
While I believe the at there also should be a separate, dedicated thread for the 991.1 and that they both should be stickied, I’d like to start a reference guide to gather all of this information in one place.
I propose FACTS only. Leave the potinions out and if you feel compelled to start a conversation, please start a dedicated thread for it.
Since the forum allows for it, I suggest that we also make use of the SUBJECT field in the the reply form, as to better identify the issue being reported.
{edit} Please also start your post with Year-Model-Trim of you car.
As a new 991.2 owner, I will followup shortly with the issues into which I’ve run and will post a dedicated reply for each, not a list in a single reply.
I’m hoping for a constructive collaboration from most of you.
Cheers
Oli
I propose FACTS only. Leave the potinions out and if you feel compelled to start a conversation, please start a dedicated thread for it.
Since the forum allows for it, I suggest that we also make use of the SUBJECT field in the the reply form, as to better identify the issue being reported.
{edit} Please also start your post with Year-Model-Trim of you car.
As a new 991.2 owner, I will followup shortly with the issues into which I’ve run and will post a dedicated reply for each, not a list in a single reply.
I’m hoping for a constructive collaboration from most of you.
Cheers
Oli
i have tech manual and another doc listing all codes with definitions if i can figure out how to attach
two common issues i see / read from folks all around the world are
1- door cards . There is an excellent shop in Florida which can repair. Only one i have seen which does a like new fix
2- PDK transmission- root cause is the sensors
all other issues i have read are not common but more one off here and there
Racer
Joined: Jul 2020
Posts: 444
Likes: 128
From: Toronto
Instructor
Joined: Aug 2020
Posts: 124
Likes: 19
From: Senoai Ga