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toffeeman
Monza


Joined: 05 Mar 2009
Posts: 165



PostPosted: Sat Oct 07, 2017 1:43 pm    Post subject: Reply with quote

alex yates wrote:
daz parker wrote:
Nice wheels but would of looked better in silver.


Only £260 to put that right and alloys usually need refurbing at some point. Very, very, very minor detail compared to the engine work most don't have.


Yep, agree with this.
 
  
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daz parker
Spa-Francorchamps


Joined: 12 Aug 2015
Posts: 301



PostPosted: Sat Oct 07, 2017 3:48 pm    Post subject: Reply with quote

It was a general comment about the wheels not the car for sale and it been a negative about the car.
 
  
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LR75
Newbie


Joined: 30 Oct 2014
Posts: 33



PostPosted: Mon Oct 09, 2017 11:29 am    Post subject: Reply with quote

Nice car, had all the big stuff done. Good price.

FYI, I paid £25k 3 year ago for a Hartech repaired C2S on 93,000 miles. Now on 103,000 not missed a beat.
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LR75
Hartech 2005 997.1 C2S
Black, Black with Black
Manchester
 
  
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pothole
Monza


Joined: 04 Oct 2011
Posts: 168
Location: Location Location


PostPosted: Mon Oct 09, 2017 5:16 pm    Post subject: Reply with quote

Marky911 wrote:
Autofarm offer everything Hartech do and the owner doesn't sit scaring people on internet forums all day. Wink That's who I'll use if I ever have to.


Not true on either count.

I pass no judgement on who does the better rebuilds, but they are very different rebuilds. Neither Hartech nor Autofarm offer everything that the other offers.

Baz from Hartech provides a lot of use info. Only cranks would think he sits around intending to scare people. In reality, he bites his tongue an awful lot.
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2006 Cayman S
 
  
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jaychief
Trainee


Joined: 17 Jan 2017
Posts: 74



PostPosted: Tue Oct 10, 2017 12:34 pm    Post subject: Reply with quote

This is the bore scope for are 911 2007, that I had done as part of the deal !!! lucky escape ???
 



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daz parker
Spa-Francorchamps


Joined: 12 Aug 2015
Posts: 301



PostPosted: Tue Oct 10, 2017 12:38 pm    Post subject: Reply with quote

Yeah I've read your post and you couldn't have done it at a worse time!

I was just about got my confidence back sorted ha ha.
 
  
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jaychief
Trainee


Joined: 17 Jan 2017
Posts: 74



PostPosted: Tue Oct 10, 2017 12:41 pm    Post subject: Reply with quote

Daz, am in the same boat as you, this is a massive issue for me !!!!
 
  
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jaychief
Trainee


Joined: 17 Jan 2017
Posts: 74



PostPosted: Wed Oct 11, 2017 11:25 am    Post subject: Reply with quote

daz parker wrote:
Yeah I've read your post and you couldn't have done it at a worse time!

I was just about got my confidence back sorted ha ha.


Daz, have you been looking for long?
 
  
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daz parker
Spa-Francorchamps


Joined: 12 Aug 2015
Posts: 301



PostPosted: Wed Oct 11, 2017 8:25 pm    Post subject: Reply with quote

Yes and no.

I've been wanting a 911 for years so started reading up on them a bit and each time I found an excuse not to get one, kids too small, kids little bit bigger, bore scoring, ims exploding blah blah blah.

I said to myself when I sell this car I'm getting one, so that's gone and I'm hopefully picking one up Sunday. The kids will like it or lump it, I do have a family so it's not too bad but if I want to get use of of it the kids have to fit.

I decided to look for one with a hartech rebuild as I'm a bit of a stress head and it might of played on my mind. I'm very mechanical sympathetic though so it wouldn't be driver error.
 
  
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alex yates
Shanghai
Shanghai


Joined: 06 Mar 2014
Posts: 11381
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Oct 11, 2017 9:40 pm    Post subject: Reply with quote

You must remember the major rule of thumb:
1. don't go above 3k rpm until oil fully up to temp. (not water temp. gauge) - no gauge but when it's up to temp. pressure gauge is around 1 - 1.5 bar at tickover,
2. No sudden change of driving that may create sudden thermal damage to the right hand block - traffic light GPs when it's been sat idling for minutes, etc.

and most importantly:

3. Once up at temp and everything's pumping round as it should be..........drive it like you ****ing pants are on fire!!!!!!!!

DO NOT drive these cars like Miss Daisy, labouring the engine, tootling around in high gears under 2k rpm. They're designed to perform between 4k - 7k rpm, nothing less!!!!!

Follow these basic rules and fall in love with the best car you've ever owned Thumb
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2000 Manual 996 C4 Arctic Silver Convertible

 
  
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Frenchmeister
Suzuka


Joined: 24 Feb 2014
Posts: 1090
Location: Beautiful Cumbria.

2004 Porsche 997 Carrera 2S

PostPosted: Wed Oct 11, 2017 9:52 pm    Post subject: Reply with quote

^^^^^As Above ^^^^^
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997 Carrera 2S 54 Arctic Silver
944 Turbo S 88 Solid Black
BMW X3 2.0D M Sport 06 Silver Grey
BMW E46 330i touring M Sport 05 Imola Red 2
 
  
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daz parker
Spa-Francorchamps


Joined: 12 Aug 2015
Posts: 301



PostPosted: Thu Oct 12, 2017 2:53 pm    Post subject: Reply with quote

Yeah I'd read these done like been launched from the traffic lights which is what I assume most do?!?
 
  
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pothole
Monza


Joined: 04 Oct 2011
Posts: 168
Location: Location Location


PostPosted: Thu Oct 12, 2017 3:30 pm    Post subject: Reply with quote

Thrashing a cold engine is obviously not a good thing in general, but I don't think it's a factor for bore scoring.

It almost always happens to the one particular side of the engine - the one with more cooling issues. If thrashing a cold engine was a significant factor in bore scoring, you'd see a much more even distribution of scoring on both banks rather than it almost always being the hotter bank and indeed the hotter cylinders on that side of the engine.
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2006 Cayman S
 
  
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alex yates
Shanghai
Shanghai


Joined: 06 Mar 2014
Posts: 11381
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Oct 12, 2017 3:38 pm    Post subject: Reply with quote

Surprised Eh?

The cooling on bank 2 is not as efficient as bank 1. Therefore, creating a dramatic change in temp. Eg. Thrashing when cold, will create bank 2 to overheat and score.
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Chris_in_the_UK
Paul Ricard


Joined: 19 Mar 2014
Posts: 3480
Location: Harrogate


PostPosted: Thu Oct 12, 2017 5:35 pm    Post subject: Reply with quote

pothole wrote:
Thrashing a cold engine is obviously not a good thing in general, but I don't think it's a factor for bore scoring.

It almost always happens to the one particular side of the engine - the one with more cooling issues. If thrashing a cold engine was a significant factor in bore scoring, you'd see a much more even distribution of scoring on both banks rather than it almost always being the hotter bank and indeed the hotter cylinders on that side of the engine.


Lol
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2006 Cayman S PCCB's
 
  
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Demort
Estoril


Joined: 21 Mar 2015
Posts: 3502
Location: Sussex


PostPosted: Thu Oct 12, 2017 6:21 pm    Post subject: Reply with quote

Some of the very few gen 2 engines with damage have been attributed to thrashing when cold .. the piston heats up faster than the liner causeing patrial seizure due to expansion rates of both piston and liner .

Not going to comment on Gen 1 .

Btw Chris .. not seen you in ages .. hope everything is ok .
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7pm - 9pm
 
  
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bazhart
Approved Trader


Joined: 20 May 2009
Posts: 818
Location: Bolton Lancashire


PostPosted: Sun Oct 15, 2017 8:26 am    Post subject: Reply with quote

In my earlier post I disagreed that "all engine builders are the same".

This season in the top 3 UK racing Championships for road based M96/7 cars those with Hartech engines to our standard specifications and built by us have won all 3.

BRSCC Boxster Championship - Won, PCGB class 1 and 2 Championship - Won, PCGB overall Championship Won, Team event Won.

All engines lasted the whole season with one winter rebuild providing power, performance and reliability and most of the other Podium places were with our engines built by us or built to our specification with our parts built by others.

That is some record - and hopefully fully answers the previous claims - enough said.

To answer a couple of recent comments - Bank 2 has the thrust face of the piston on the top and bank 1 on the bottom. From cold the oil has dripped off the top of both pistons leaving bank 2 more dry on start-up. also the coolant enters both blocks at the bottom. There is limited flow and it flows slowly up the cylinders - so bank 2 always has the top of the piston thrust face hotter than the thrust face of the pistons in bank 1 since the coolest coolant hits the thrust face of bank 1 pistons first and bank 2 pistons last and this is a differential in the oil temperature and the oil film thickness that results that helps prevent loose silicon particles digging into the piston and cylinder bore.

Low revs with high power or torque present the greatest piston face loads on the cylinder bore - higher revs do not so Alex is right -- refrain from high power from cold but when hot use revs and enjoy it.

Gen 1 piston scoring is caused by silicon particles release from the cylinder matrix attacking one side of the piston on the thrust face. Gen 2 scoring is caused by seizures on both sides of the piston because it has expanded more than the bore from cold influenced by tighter build bore clearances and some shrinkage of the cylinder bores in some engines in the thrust direction (where the piston is biggest) over long periods of time

Baz
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You can trust us to "CARE FOR YOUR PORSCHE"
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