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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30191
Location: Hertfordshire and Hampshire


PostPosted: Tue Feb 14, 2017 10:00 pm    Post subject: Reply with quote

stone40 wrote:
GT4 wrote:
Leave it alone.

If you happen to have a clutch change (or Throwback Tuesday, RMS swap), then visually inspect and pull the outer seal.

Just remember, you have the dual-row IMSB with less than an 1/8th of the chance of dying as the 996.2 or even my current car! (indeed, most 997.1 Carrera/Targa)

Sleep well!

Sleepy Happy


... do fit an LTT though Thumb

PS - Welcome - my first Porsche was a 996 Carrera 4 3.4 X51!



I'll leave alone then! So many different opinions and experts on the net!

Your first car looks great! thumbsup I have the same wheels and side skirts but standard front and rear bumpers

What are the benefits of LTT and what's the best source? Is it a Porsche or aftermarket part?


Benefits are mitigated borescore (note, this is almost irrelevant on better cooled 996.1 3.4, but still advantageous).

Performance and economy improve slightly (the engine is designed to run hot to lower NOx and other secondary emissions)

The part is after market (sort of, the housing and gasket are OEM and factory Cup Cars run even cooler at 130F/55C, but the thermostat part will not be available from Porsche - although the part is from the same OEM manufacture of both high and low temp thermostats)

See here (best place FrazerPart @ £45 for housing, thermostat, gasket and delivery)


http://911uk.com/viewtopic.php?t=65932

Page 6 (for part ref):
http://911uk.com/viewtopic.php?t=117860&start=100
 
  
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stone40
Newbie


Joined: 12 Feb 2017
Posts: 3



PostPosted: Tue Feb 14, 2017 10:15 pm    Post subject: Reply with quote

Thanks GT4. I'd just found your guide from 2011 thumbsup
 
  
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X51 996
Trainee


Joined: 14 Nov 2016
Posts: 56
Location: Surrey


PostPosted: Tue Feb 14, 2017 11:14 pm    Post subject: Reply with quote

GT4 wrote:
Advice is still as above (but you are higher risk being 996.2)

I suspect the RMS (seal) was changed (the IMS seal would not be noted as it is not serviceable part, ie very few would know about it and no OPC could touch it as there is no TSB on its serviceability - it's a whole new IMS and IMSB (with seals) if it were actioned by OPC)


Hi,

Have just dug through the paperwork.

It did have a clutch at OPC East London circa 12k miles ago in 2011 at 51k. Then working back from there it was serviced three times by Porsche in 5k miles/2 years (45k, 48k and 50k). All at the same OPC. Seems astonishing to me but with the clutch change, a set of discs and a set of tyres plus a few misc items the previous owner spent close to £7k in 6k miles on just routine stuff.

Anyway - for some reason prior to that at around 36k miles it had a clutch change but this time at a Porsche Specialist - 'Porsheworx Engineering' (have never heard of them myself before) and the invoice shows the following:



'Intermediate shaft plate and bolts' and then on the bottom of the invoice it shows 'Replaced leaking intermediate plate and seal'

I would have assumed as you say it would be an RMS leak but they have also listed that separately - any ideas?

Anyone know of this place?

https://www.porsheworx.com

Thanks,

Will
_________________
2003 911 Carrera 2 coupé, Arctic Silver - 3.6 manual, X51 Carrera PowerKit, X74 Suspension, Sunroof delete, PSM delete. Black leather crested sports seats (XSC), XAG rear spoiler, 5-spoke 18" Carrera Alloys, Xenons.

2004 Mercedes E55K AMG Estate
1988 Mercedes 190E 2.3-16
1988 Mercedes 190E 2.5-16
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30191
Location: Hertfordshire and Hampshire


PostPosted: Wed Feb 15, 2017 12:28 am    Post subject: Reply with quote

Well, it is the IMS plate seal, but that not only is pretty rare (vs RMS leaks), but is also not the IMSB seal.

The plate seal is the brown ribbed "o-ring" here:



And pissing oil here:



Now it is the free oil (normally only) the other side of that end plate that you want to treat the IMSB to.

ie strip the IMSB of its outer seal and let the block oil in (in a way, the oil out the plate and not in the seal is the EXACT opposite of what you want!)
 
  
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X51 996
Trainee


Joined: 14 Nov 2016
Posts: 56
Location: Surrey


PostPosted: Wed Feb 15, 2017 12:47 pm    Post subject: Reply with quote

GT4 wrote:
Well, it is the IMS plate seal, but that not only is pretty rare (vs RMS leaks), but is also not the IMSB seal.

The plate seal is the brown ribbed "o-ring" here:



And pissing oil here:



Now it is the free oil (normally only) the other side of that end plate that you want to treat the IMSB to.

ie strip the IMSB of its outer seal and let the block oil in (in a way, the oil out the plate and not in the seal is the EXACT opposite of what you want!)


Hi again,

Thanks for the details.

I wonder if when the RMS was leaking in the past, maybe the oil leaked over the IMS plate - hence possibly a misdiagnosis or changed as a precaution if they don't usually leak? Who knows - it was circa ten years ago now.

So I guess as it's not likely to need a clutch anytime soon (done last by Porsche 12k back) and there is no sign of oil leaks from that area then probably best to leave it alone?

Not aware of any untoward noises etc so I might just do the LTT and a coolant change at some point soon for peace of mind.

Does the 3.6 X51 have any additional lubrication/oil system mods other than the baffled sump? Anything else I should be concerned about or look into?

Cheers,

Will
_________________
2003 911 Carrera 2 coupé, Arctic Silver - 3.6 manual, X51 Carrera PowerKit, X74 Suspension, Sunroof delete, PSM delete. Black leather crested sports seats (XSC), XAG rear spoiler, 5-spoke 18" Carrera Alloys, Xenons.

2004 Mercedes E55K AMG Estate
1988 Mercedes 190E 2.3-16
1988 Mercedes 190E 2.5-16
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30191
Location: Hertfordshire and Hampshire


PostPosted: Wed Feb 15, 2017 3:04 pm    Post subject: Reply with quote

AFAIK Porsche dropped the additional oil line and dual chamber pump after 996.1 3.4 X51

Easy enough to identify though from the photos in this thread (oil line).
 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30191
Location: Hertfordshire and Hampshire


PostPosted: Fri May 12, 2017 3:05 pm    Post subject: Reply with quote

997.1 X51 exhaust manifold comparison:



 
  
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GT4
Nordschleife
Nordschleife


Joined: 08 Nov 2008
Posts: 30191
Location: Hertfordshire and Hampshire


PostPosted: Fri May 12, 2017 3:17 pm    Post subject: Reply with quote

Example VIL (NB: same format across models, 993,996,997 etc, although later models only have service book VIL, not both service book and under-bonnet)

 
  
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steve r
Silverstone


Joined: 26 Sep 2011
Posts: 133



PostPosted: Tue Oct 03, 2017 8:37 pm    Post subject: Reply with quote

Some more 3.6 X51 info.

No mention of a different oil pump for the 3.6 & the 3rd radiator is mentioned but the 40th Anniversary didn't get it due to the larger Turbo rads.












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40th Anniversary
 
  
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Y2K
Monza


Joined: 08 Mar 2016
Posts: 214
Location: Hampshire


PostPosted: Fri Oct 06, 2017 2:48 pm    Post subject: Reply with quote

^^^^

Thanks for uploading them.
_________________
2001 996 Carrera 2 3.4
1999 Integra DC2
 
  
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steve r
Silverstone


Joined: 26 Sep 2011
Posts: 133



PostPosted: Sat Oct 07, 2017 7:07 pm    Post subject: Reply with quote

No problem, hopefully they are useful.
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Algetsa911
Newbie


Joined: 09 Oct 2017
Posts: 1



PostPosted: Mon Oct 09, 2017 6:24 am    Post subject: Reply with quote

I just bought an 3.4 X51 and this thread has been awesome to review and super interesting - though I'm not sure it mattered whether some guy did/didn't get his info first hand (like a resident anorak needed to assert).
It seems that the most important think is to ensure that any shop working in these limited run cars ensure they source correct parts over time to keep them to original spec, and thereby retaining the individuality and value. Cheers to everyone who's contributed. thumbsup
 
  
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