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cossiemike
Newbie


Joined: 23 Dec 2017
Posts: 23



PostPosted: Wed Nov 28, 2018 4:53 pm    Post subject: Knackered 3.4 Reply with quote

My engine finally let go a few months ago. Have been to busy to do anything about it ,so finally dropped the engine out and dropped it off at Hartech.Result knackered crank etc. Quote from Grant for partial rebuild with s/h crank,rod.Plan B with new liners etc & top end overhall.Plan C full rebuild to 3.7. So 3.7 it will be after reading the article in 911 & Porsche world. Hopefully it will be done before the end of the year. Mike.
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6363
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Nov 28, 2018 5:01 pm    Post subject: Reply with quote

Sorry to hear that. Was it the main bearings which went in the end? Do you know what mileage the engine was on?

MC
 
  
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Osh
Sepang


Joined: 19 Nov 2012
Posts: 2818
Location: Bristol


PostPosted: Wed Nov 28, 2018 5:14 pm    Post subject: Reply with quote

Mike - as MC says, sorry to hear this.

Please can i ask, if its OK with you - that you come back here and give us full and regular updates...??

Hope this all gets sorted for you m8 Thumb



Osh
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14476
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Nov 28, 2018 5:18 pm    Post subject: Reply with quote

As above. Sorry to hear. Watching with interest.
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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cossiemike
Newbie


Joined: 23 Dec 2017
Posts: 23



PostPosted: Wed Nov 28, 2018 5:20 pm    Post subject: Reply with quote

Hi,it was a big end that went and did the rod & crank.With it stripped the bottom end was on last legs through wear.Top end looked ok but it was showing wear.Will try to update with some pictures. Mike.
 
  
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cossiemike
Newbie


Joined: 23 Dec 2017
Posts: 23



PostPosted: Wed Nov 28, 2018 5:32 pm    Post subject: engine internals Reply with quote

Some pictures of the internals.
 



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cossiemike
Newbie


Joined: 23 Dec 2017
Posts: 23



PostPosted: Wed Nov 28, 2018 5:35 pm    Post subject: Reply with quote

Mileage about 90000 & was running sweetly until a bit off a thrash in 3 figures.a long curve and oil surge I think.
 
  
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sackerley
Silverstone


Joined: 16 Mar 2016
Posts: 125



PostPosted: Wed Nov 28, 2018 6:48 pm    Post subject: Reply with quote

Always sad to hear of failures like this but I’m Very interested to see how it works out with the 3.7 upgrade.

Best of luck with it. Please keep us posted Thumb
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1998 Artic Silver 996.1 - manual - carbon interior - Momo Protopito
 
  
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Robertb
Long Beach


Joined: 01 Sep 2003
Posts: 6721
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Wed Nov 28, 2018 7:11 pm    Post subject: Reply with quote

Ouch... but exciting to be doing a 3.7!

Will be interesting to follow the progress.
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"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
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911munKy
Nürburgring


Joined: 26 Nov 2014
Posts: 473



PostPosted: Wed Nov 28, 2018 7:43 pm    Post subject: Reply with quote

cossiemike wrote:
Mileage about 90000 & was running sweetly until a bit off a thrash in 3 figures.a long curve and oil surge I think.


Not really a high mileage then, shouldn’t have gone pop through wear and tear for many more miles. Abused when it was younger?
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2000 C2 996
 
  
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GMG
Monza


Joined: 07 Jan 2018
Posts: 200
Location: Devon


PostPosted: Wed Nov 28, 2018 8:11 pm    Post subject: Reply with quote

...really bad luck.I have felt your pain.

Bore Score, Piston Skirt Wear, Worn Bearings and totalled Crank journals at 90k miles on the supposedly more robust 3.4?

Running fine one minute and ***** the next just like mine at 69k...these engines are more fragile than a kinder egg...

Good luck.
 
  
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jond58
Silverstone


Joined: 19 Jun 2017
Posts: 124



PostPosted: Wed Nov 28, 2018 8:36 pm    Post subject: Reply with quote

GMG wrote:
...really bad luck.I have felt your pain.

Bore Score, Piston Skirt Wear, Worn Bearings and totalled Crank journals at 90k miles on the supposedly more robust 3.4?

Running fine one minute and ***** the next just like mine at 69k...these engines are more fragile than a kinder egg...

Good luck.


Really, I dont post much on here. I do, however, log in everyday and read the threads.
GMG are we going to let it lie now or is this the future of this forum where at every opportunity youre going to bang on about your engine going pop. These cars have some inherent issues, I'll give you that but they are known and documented and as such, as with any second hand car, you buy at your own risk. Did you buy it new from Porsche, Ill asssume not so whos to say the previous owner didnt sit bouncing off its limiter in the garage all night?!
If, maybe 'WHEN' mine goes bang, Ill call Hartech and Strasse get some prices and an action plan and get it sorted. What I wont do is spend every day harping on about it.
Motorised vehicles are a pain, ALL of them have inherent issues and ALL of them have the potential to cost money and frustrate us. Dont like that? WALK EVERYWHERE
 
  
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jond58
Silverstone


Joined: 19 Jun 2017
Posts: 124



PostPosted: Wed Nov 28, 2018 8:38 pm    Post subject: Reply with quote

Also to the OP. Sorry it has gone boom, good luck with sorting it and keep us posted with what you choose.
 
  
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GMG
Monza


Joined: 07 Jan 2018
Posts: 200
Location: Devon


PostPosted: Thu Nov 29, 2018 6:02 am    Post subject: Reply with quote

...I have as much right to express my opinions as anyone on this forum...the fact that I don't harbour and express demonstrable delusions such as ...nicely run in at 100k miles...or....3.4s don't bore score etc,etc seems to offend sensibilities?

Vis a vis my car...the indisputable fact is that it went pop to the tune of £15k without warning...

It is now safely tucked up in my garage and I am indeed over it but this experience hasn't changed my view that these engines are fragile and can and do grenade without warning and irrespective of useage and maintenance history...

And I have owned dozens of cars and not one has had a foible so significantly expensive or illusive to predict...these engines have inherent flaws that stretch far beyond the typical norm and anyone that believes otherwise is frankly beyond objective reason...
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14476
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Nov 29, 2018 7:48 am    Post subject: Reply with quote

GMG wrote:
...I have as much right to express my opinions as anyone on this forum...the fact that I don't harbour and express demonstrable delusions such as ...nicely run in at 100k miles...or....3.4s don't bore score etc,etc seems to offend sensibilities?




That's cos it's a lie. Yes, a very small amount go pop. Many don't. Most cars on the road don't even get to 20 years old. Nobody's in denial that there are some inherent faults that a small % of these cars suffer, but the way you post is as though they're the world's worst engine that will undeniably go bang when you least expect it.

Its like saying all Muslims are terrorists!

And where did the OP state all this - "Bore Score, Piston Skirt Wear, Worn Bearings and totalled Crank journals at 90k miles on the supposedly more robust 3.4?" or did you invent that too?

You're just not very helpful to other members. I've aske you twice now if you can fill your details in on the 996 ims bearing data collection thread so we can track the amount of failures and other members can decide for themselves how much of an issue it is and make a judged decision but you couldn't even be bothered to do that. All I got was:

GMG wrote:
...mine collapsed at 69k miles...no warning... dwarf and bearing debris found throughout the engine when stripped down...


&

GMG wrote:
...no dwarfs were found in the engine...swarf was though Very Happy



When every other member who's posted on there entered their data.

Do you not see why members get upset when you post on here?
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Last edited by alex yates on Thu Nov 29, 2018 8:14 am; edited 2 times in total
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6363
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Thu Nov 29, 2018 8:11 am    Post subject: Reply with quote

I have said before that from looking at the design, hearing other peoples stories, talking with engine experts, and from engines I have seen myself, unless I knew the FULL history of the engine and how it has been driven from new I would want new bearings in it by 100k miles as a precautionary measure on these. I wouldn't be worried about bore scoring or IMS bearing, but the bores would be checked for ovality when it is apart.

MC
 
  
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James M-S
Hockenheim


Joined: 11 Apr 2017
Posts: 740
Location: Derbyshire

2009 Porsche 997 Carrera 2

PostPosted: Thu Nov 29, 2018 8:13 am    Post subject: Reply with quote

Sorry to hear this Mike.

I’m sure it will come back in better health than it ever has been.

James

Thumb
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Kryton
Spa-Francorchamps


Joined: 05 Mar 2005
Posts: 331
Location: Coniston, Lake District


PostPosted: Thu Nov 29, 2018 8:25 am    Post subject: Reply with quote

It'll be a great engine when you get it back OP Thumb
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991.2 GT3, full Club Sport pack----to be replaced by a Weissach Pack Lizard Green GT3RS, 2nd quarter 2019

2Lt 718 Cayman (weekday drive)
 
  
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Dammit
Kyalami


Joined: 23 Sep 2016
Posts: 1918



PostPosted: Thu Nov 29, 2018 8:29 am    Post subject: Reply with quote

I think people need to re-address their use of language, and their conception of what "flaw" means in particular.

The 911 is a sports car - when the 996 was launched it was classed as a super car (that expression feels dated now, to me at least), and it's worth looking at why.

Quick answer? They're exciting, they have a dynamic performance envelope that gets the pulse racing, adrenalin flowing - and may result in having to tow your car out of the field it ended up in.

I think the M96 designer should be praised for wanting to add to this - not only do you enjoy the excitement of the power, grip, "interesting" weight distribution, but you also have the wild-card element represented by the main bearings/crank, IMS, valve-train and bores.

You can be stuck in traffic, with for e.g. a very low chance of ending up in a field, upside down and on fire when suddenly, out of nowhere - boom! The crank has broken as you put the clutch in.

Suddenly your day is as exciting on the commute as if you were taking Eau Rouge flat in fifth.
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14476
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Nov 29, 2018 8:33 am    Post subject: Reply with quote

Yep - that sounds like my daily commute Grin
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