What's new
Porsche 911 UK Enthusiasts Online Community Discussion Forum GB

Welcome to the @Porsche911UK website. Register a free account today to become a member! Sign up is quick and easy, then you can view, participate in topics and posts across the site that covers all things Porsche.

Already registered and looking to recovery your account, select 'login in' and then the 'forget your password' option.

Welcome to Hartech, the UK's leading Independent Porsche engine specialists, located in Bolton, UK

997.2 engine failure and Bose

J

jovie

New member
Joined
9 Sep 2008
Messages
13
Does the gen 2 3.8 experience the same engine problems as the gen 1 i.e. IMS failure and bore scoring?
When did the larger IMS engine start production?
And finally are there two different types of Bose audio on offer as I overheard someone in an audio shop say something about the 'upgraded' Bose?
Thanks


OOPS!!!!!!!!!!!!
 
jovie said:
Does the gen 2 3.8 experience the same engine problems as the gen 1 i.e. IMS failure and bore scoring?When did the larger IMS engine start production?
And finally are there two different types of Bose audio on offer as I overheard someone in an audio shop say something about the 'upgraded' Bose?
Thanks


OOPS!!!!!!!!!!!!
Click to expand...

Short answer to your first point - no. Although one would still need to excercise prudent warm up procedures.
When you say "larger IMS engine" do you mean the Gen 2 engine? It is in fact a few cc smaller than the Gen 1 at 3800. Gen 2 started turning up on '08 997's :?:

Somone will be along soon with an answer to your audio question I'm sure.
 
The Gen 2 engine is a completely different design and has no IMS, so IMS failure is impossible. 8)

Bore scoring, not sure ... I haven't heard of any such issues on Gen 2 cars.

Sorry no idea on the audio.
 
jovie said:
And finally are there two different types of Bose audio on offer as I overheard someone in an audio shop say something about the 'upgraded' Bose?
Click to expand...

I am not aware of there being 2 levels of Bose. However, there was an option of a 'sound package plus' - not Bose, but upgraded from the standard fit audio system. Also, if they were talking about the new 991 then they might have been referencing that there is a Bose option for about £1k and a high end Burmester system at about £3k.
 
I will be boring ...

The only potential problem with the DFI engine is carbon build up on the inlet valves, this is because no fuel passes by them. The inlet is then coated with oil mist from the gas recirculation(from crankcase) to reduce emmissions.

I have not seen any 997 DFI engines pictures yet ... mostly other cars(note any car make with direct injection will have this issue)

This is easy but costly to sort out.
 
Andyuk911 said:
I will be boring ...

The only potential problem with the DFI engine is carbon build up on the inlet valves, this is because no fuel passes by them. The inlet is then coated with oil mist from the gas recirculation(from crankcase) to reduce emmissions.

I have not seen any 997 DFI engines pictures yet ... mostly other cars(note any car make with direct injection will have this issue)

This is easy but costly to sort out.
Click to expand...

Not boring at all - on the contrary adds to the discussion. I have also heard this too. I further heard this year that some outfit (it might even have been Hartech but cannot recall) recently opened up a 2008 Gen 2 Carrera engine and reported no build-up of carbon deposits. Perhaps at 4 years old there hasn't beeen enough time for it to do so.

~ Maxie
 
All valves carbon up eventually but it doesnt bring impending doom, sure it may interupt smooth airflow but you will never notice the difference in its drivability.

All cars have had breather systems for years in that combustion bypass gasses are drawn into the engine and burnt and some of these engines have covered over 250K miles.
The older engines used to draw lots of oil into the induction side via the valve guides - all that was in the way was a tiny rubber seal sat on the top of the valve guide and oil was simply sloshed around inside the rocker cover bathing the whole area with oil, and even after 100000 miles the carbon build up didnt affect the running of the engine so i wouldnt worry about the gen 2 engine being more susceptable to carbonising of the valves - for one i dont believe it - just another scare story started by someone
 
You must log in or register to reply here.

Similar threads

Porsche News
A guide to the Porsche 911 GT3
Replies
1
Views
357
Roro
Roro
Porsche News
Design911, 2023 Porsche Christmas Gift List!
Replies
0
Views
927
Porsche News
Porsche News
S
Porsche Active Engine Mount Failure PADM
Replies
4
Views
2K
deMort
D
911UK
Former GP F1 driver Nick Heidfeld and his 959 Sport
Replies
1
Views
794
DRZ911
DRZ911
Zingari
Two Sandwiches Short of a Picnic
2 3
Replies
35
Views
4K
jonttt
jonttt
911Time
Porsche 997/991 - Tech Nuggets: PDK History & Engineerin
Replies
7
Views
4K
911Time
911Time
N
Upgraded newbie 997 gen 2 4s!
2
Replies
18
Views
2K
IMI A
IMI A
Passion for perfection Porsche Car Sales

Latest posts

New Threads

Porsche Model Range

Porsche 911

Porsche 992: 2018- Porsche 992: 2018- Porsche 991: 2011-2019 Porsche 991: 2011-2019 Porsche 997: 2004-2012 Porsche 997: 2004-2012 Porsche 996: 1997-2005 Porsche 996: 1997-2005 Porsche 993: 1993-1998 Porsche 993: 1993-1998 Porsche 964: 1989-1993 Porsche 964: 1989-1993 Porsche Carrera 3.2: 1983-1989 Porsche Carrera 3.2: 1983-1989 Porsche Carrera SC: 1977-1983 Porsche Carrera SC: 1977-1983 Porsche 930 Turbo: 1975-1989 Porsche 930 Turbo: 1975-1989 Porsche Early 911: 1964-1977 Porsche Early 911: 1964-1977

Porsche Hypercars

Porsche 918 Spyder Porsche 918 Spyder Porsche Carrera GT Porsche Carrera GT Porsche GT1 Porsche GT1 Porsche 959 Porsche 959

Other Current Porsche Model

Porsche Taycan : (2019-0%) Porsche Taycan : (2019-0%) Porsche Macan : 2013- Porsche Macan : 2013- Porsche Panamera : 2009- Porsche Panamera : 2009- Porsche Cayman: 2005- Porsche Cayman: 2005- Porsche Cayenne: 2003- Porsche Cayenne: 2003- Porsche Boxster: 1997- Porsche Boxster: 1997-

Porsche Legacy Models

Porsche 928 Porsche 928 Porsche 968 Porsche 968 Porsche 944 Porsche 944 Porsche 924 Porsche 924 Porsche 914 Porsche 914 Porsche 912 Porsche 912 Porsche 904 Porsche 904 Porsche 550 Porsche 550 Porsche 356 Speedster Porsche 356 Speedster Porsche 356 Porsche 356

Forum statistics

Threads
124,589
Messages
1,441,845
Members
49,021
Latest member
Camarocane

porsche insurance porsche parts porsche sales porsche car sales porsche for sale
porsche classic sales porsche tuning porsche sold porsche specialist porsche engine rebuilds porsche driver training porsche car sales porsche exhausts

Community platform by XenForo® © 2010-2024 XenForo Ltd. XenForo theme by xenfocus

www.911uk.com @Porsche911UK THE DEFINITIVE PORSCHE FORUM Copyright © 911UK 2002-2024 All rights reserved.

911uk.com is not associated and is wholly independent of Porsche Automobil Holdings SE, Dr. Ing.h.c.F.Porsche AG, Porsche Cars GB, its subsidiaries and offical Porsche centres. Any word, phrase or graphic that in any way resembles anything to do with the Porsche name or organisation are registered trademarks of Porsche Automobil Holdings SE and Dr. Ing.h.c.F. Porsche AG.

Back
Top