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owend
Newbie


Joined: 31 Oct 2018
Posts: 5



PostPosted: Wed Oct 31, 2018 1:29 pm    Post subject: Engine Rebuild by RedTek... how long will it last? Reply with quote

First time poster, long time lover..

About to join the fold and buy my first 911!!

I'm looking at a 997 3.8s which has tons of history and a full RedTek £7.3k engine rebuild. I can't get hold of RedTek to understand exactly what they changed. The invoice talks about "Strip down engine, replace 6 cylinders and 1 piston" and then the full rebuild kit inc bearings/rings etc.

This was done 5yrs / 30k miles ago. She's now on 100k miles.

So, the question is, am i back into the bore score & IMS territory again. Or are RedTek like Hartech in that they would have future proofed it?

Many Thanks guys.
 
  
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FZP
Magny-Cours


Joined: 18 Jan 2015
Posts: 2588
Location: Cheshire


PostPosted: Wed Oct 31, 2018 1:36 pm    Post subject: Reply with quote

If say you really need to get hold of Redtek to understand what actual work was carried out. Get it from the horses mouth I'd say. Keep plugging away
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 14429
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Oct 31, 2018 1:54 pm    Post subject: Reply with quote

Its very hard to tell without speaking to the rebuild guys , there are many that can and do rebuild these engines but they use new OE parts unlike Hartech who have redesigned parts to overcome the weaknesses , So in theory if it was rebuild using OE parts it would potentially have the inherant weaknesses having said that only about 5% of these cars fail from borescore and about 8% from IMS failure .
Depending on the age of the car as to whether it had the newer IMS originally or again during the rebuild did they rebuild using the newer IMS. this info is important as you would then be able to discount that.
Then you left with Borscore as its 5% ish of cars it would be bloody unlucky if the same car suffered scoring twice in its life , but potentially still a possibility although I would think the odds very low considering the mileage .
But thats only my thoughts without seeing or knowing the car or what was done or even knowing much about redtek and the std of their rebuilds . from a positive point of view the rebuild cant be bad if its done 30k in 5 years and still happily going .
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Last edited by Phil 997 on Wed Oct 31, 2018 1:55 pm; edited 1 time in total
 
  
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Robertb
Long Beach


Joined: 01 Sep 2003
Posts: 6646
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Wed Oct 31, 2018 1:54 pm    Post subject: Reply with quote

Nick Fulljames at RedTek is very well regarded, so I would imagine the job would have been done properly.

If you can get hold of the spec of the rebuild that it would be helpful for the history of the car.
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911tom
Kyalami


Joined: 22 May 2012
Posts: 1966
Location: Buckinghamshire


PostPosted: Wed Oct 31, 2018 1:57 pm    Post subject: Reply with quote

I am not familiar with Redtek. Quick google reveals they are more in to aircooled cars. If the invoice only states replacement parts then that will mean they've likely just ordered them from Porsche and Porsche have sent what they had at the time of the build. What I mean by that is Porsche do tweak the designs slightly if they become aware of issues. Harlech manufacture there own parts / carefully select after market parts which are manufactured to reduce the known risks.

The only way to know for sure what was done is to call Redtek and ask. Reality is it has covered 30k miles so if it was a botched build it would have let go by now. If it was rebuilt with standard off the shelf Porsche parts then I would be inclined to treat it like any other car that has not had a build.
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Oct 31, 2018 2:02 pm    Post subject: Reply with quote

replacing cylinders doesn't sound like a straightforward strip down and rebuild, the cylinders are machined in to the block. Definitely get more info from the company who did the work.

MC
 
  
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owend
Newbie


Joined: 31 Oct 2018
Posts: 5



PostPosted: Wed Oct 31, 2018 2:06 pm    Post subject: Reply with quote

Yea, unfortunately although RedTek seem to be highly regarded, i don't think they still operate. Think the guy retired? And hence why i can't get hold.

I've seen some stuff about them, and by all accounts they are top notch? Be interested to hear views on here of experience etc.

i'm unlikely to be able to get detailed info other than the original invoice.

So, i really like the car but trying to go in with eyes WIDE open...
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 14429
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Oct 31, 2018 2:14 pm    Post subject: Reply with quote

owend wrote:
Yea, unfortunately although RedTek seem to be highly regarded, i don't think they still operate. Think the guy retired? And hence why i can't get hold.

I've seen some stuff about them, and by all accounts they are top notch? Be interested to hear views on here of experience etc.

i'm unlikely to be able to get detailed info other than the original invoice.

So, i really like the car but trying to go in with eyes WIDE open...


What year is the car Thumb
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owend
Newbie


Joined: 31 Oct 2018
Posts: 5



PostPosted: Wed Oct 31, 2018 2:16 pm    Post subject: Reply with quote

March 2006 06 reg (C4S)... 'think' that was just before Porsche released the new IMS?
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 14429
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed Oct 31, 2018 2:25 pm    Post subject: Reply with quote

owend wrote:
March 2006 06 reg (C4S)... 'think' that was just before Porsche released the new IMS?


March is the accepted date they were all changed over by but some 05 cars got the newer bearings the only diffinitive is to check the engine number against this info to be sure . that way at least your aware if your concerned about 1 or 2 issues. hope this info helps you sort the has it hasnt it IMS issue ,

Last IMS revision before no IMS (Gen2 MA1 block):

997 Carrera 3.6 with engine numbers from M96/0569507475 are the new IMS design.

M96/05 = 997 3.6 Carrera NA
6 = 6 cylinders
9 = design revision
5 = year (2005)
07475 = cumulative production serial

This means some MY2005 benefit and all MY2006 onwards benefit.


997 Carrera S 3.8 with engine numbers from M97/0168509790 are the new IMS design.

M97/01 = 997 3.8 Carrera NA
6 = 6 cylinders
8 = design revision
5 = year (2005)
09790 = cumulative production serial

This means some MY2005 benefit and all MY2006 onwards benefit.
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andrews7889
Newbie


Joined: 30 Apr 2014
Posts: 17



PostPosted: Wed Oct 31, 2018 2:30 pm    Post subject: Reply with quote

Contacting Nick was discussed on DDK recently.

Darren knows him pretty well so expect his response is most accurate.

http://www.ddk-online.com/phpBB2/viewtopic.php?f=44&t=63474&hilit=redtek

Andrew
 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 7868
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Wed Oct 31, 2018 3:00 pm    Post subject: Reply with quote

You obviously need to know what they did but finding out is going to be difficult, hopefully there are others with the same rebuild and they can tell you what was done to theirs?

The main and probably only thing you need to know is what did they use for their bore material, there are lots of engine builders that are sending their engines for work by Hartech and the like because they just don't have the full machining facilities but as far as the consumer is aware it was all done in house unless specifically asked, could also likely be ductile as this is cheaper but the rebuild was reasonably expensive.

There is a clue though, if only one piston was supplied it would suggest that only one bore had scored, this then raises the question, why did they renew all six bores unless it was to upgrade to Nikasil liners

If it was just a single bore that scored and ductile liners were used you probably would not bother renewing all the others with the same material? Dont know
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owend
Newbie


Joined: 31 Oct 2018
Posts: 5



PostPosted: Wed Oct 31, 2018 4:11 pm    Post subject: Reply with quote

infrasilver wrote:


There is a clue though, if only one piston was supplied it would suggest that only one bore had scored, this then raises the question, why did they renew all six bores unless it was to upgrade to Nikasil liners

If it was just a single bore that scored and ductile liners were used you probably would not bother renewing all the others with the same material? Dont know


like your thinking. Nick at RedTek seems to be top notch, so i'm hopeful he'd have done a hartech standard of work.

This could also be a nice dab of confirmation bias... i'm itching to get into a 911
 
  
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Robert SausageTrousers
Silverstone


Joined: 02 Apr 2018
Posts: 113



PostPosted: Wed Oct 31, 2018 4:32 pm    Post subject: Reply with quote

If you don't mind me asking, what sort of money are they asking for the car?
 
  
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owend
Newbie


Joined: 31 Oct 2018
Posts: 5



PostPosted: Wed Oct 31, 2018 5:45 pm    Post subject: Reply with quote

Robert SausageTrousers wrote:
If you don't mind me asking, what sort of money are they asking for the car?


£25k

But that's not what i'll pay for it if i'm honest. Prices seem to be all over the shot at the moment.
 
  
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HSC911
Zolder


Joined: 23 Jul 2014
Posts: 5563
Location: Bedford


PostPosted: Wed Oct 31, 2018 8:09 pm    Post subject: Reply with quote

Welcome

I hope it works out for you Thumb
 
  
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krispe
Monza


Joined: 05 Feb 2014
Posts: 239
Location: Northampton


PostPosted: Thu Nov 01, 2018 4:59 pm    Post subject: Reply with quote

Nick at Redtek has an excellent reputation. He would have used Westwood iron liners (which cannot score). Talking to RPMTechnik a few years ago, their first 997 CSR engine was rebuilt by Nick at Redtek and they went with iron liners knowing the car would be used hard on track. As long as the rest of the car is what you want, I personally would be very happy and feel pretty secure knowing the engine had been rebuilt by Nick and all liners replaced.

PS I don't want to get into a Westwood iron Vs Hartech Nikasil liner debate. I personally think the Hartech solution is best and went that way on my own 997 3.9 rebuild, but an iron liner FITTED CORRECTLY will also work perfectly well and last forever.
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