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Larry735dn1

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About Larry735dn1

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  • From
    London
  • Porsche Club
    No
  • Present cars
    Cayenne S
    Bentley Conti GT
    BMW 7-series
  1. Hi again, Season's Greetings! Has anyone had any positive interaction with Porsche re these problems? In my case Porsche has been uncooperative despite the scoring happening shortly after the car came back from Porsche main service (they had not filled enough oil - the dipstick was dry, the oil pressure monitor was failed -they did replace this free of charge, and they had left air locks in the cooling system following the change of coolant pipes in the "V").. Nothing to do with them, they say... Have not found an acceptable solution yet. The car runs fine except for the knocking at lowe
  2. Hi Sam, Sorry to hear that. Yes the heavier knocking sounds like what they call piston slap. In my case a bore scope inspection showed scoring in cyl no 3. Scoring shouldn't in itself cause knocking, so more likely there is a tolerance issue or perhaps broken piston or piston ring causing both the knocking and the scoring... From what I can ascertain, Porsche prescribe a new engine block due to all the labour involved in repairing the bore, but it is less clear why one could not replace the offending piston/rings and live with a little scoring..? Porsche seem to wash their hands of t
  3. Thanks for these pointers guys - could come in handy... Still hope Porsche UK will do the right thing and will pursue the dealer who may have caused the damage as far as it will go.. BTW One scored cylinder (only cyl 3) must be caused by something (like snapped piston ring perhaps?)... Strangely enough the dealer didn't do a compression test, but how likely is it that a new piston or piston rings may solve the problem, at least temporarily - it obviously does not remove the scoring, and how big a job is it to get the piston out anyway? Do you need "engine out" to change piston rings? Anyo
  4. Hi, sorry to hear that... clearly there are some weaknesses with these engines. Several friends have had to get new engines for their 997s and 996s too, Porsche should sit up and address the issue it clearly has with engine weakness.. I have approached Porsche Uk for goodwill. I am also going after the dealer who returned the car with faults after changing the coolant pipes and doing a major service. They returned the car without filling enough oil, with a faulty oil pressure monitor, and with air locks in the coolant system....which is likely how the damage occurred in the first place. Ha
  5. Have not gone ahead with engine replacement yet. So far I have been quoted prices that make the new engine route non-viable...Complete engine @ $ 21,700 and Short engine (more labour) @ $ 17,600 equivalent... Incl VAT (sales tax) but still extortionate relative to residual value of the car... Am pursuing Porsche for contribution and will take that all the way, as both these problems are unacceptable to push over on the client when all maintenance, oil changes etc have been meticulously adhered to. Only 65,000 miles after all... If all else fails I think replacement engine may be the way to go,
  6. Hi, A lot of Cayennes must have been running without major issues... However there are some really poor solutions that should not occur in a car of this perceived quality. One is the dreaded Coolant pipes.. The coolant pipes in the "V" of the engine are made of plastic, goes brittle and are prone to crack with a sudden drop of coolant. It is a $ 1500-1800 job to replace with the aluminium replacement kit, although possible to DIY.. The other is this cylinder scoring issue - the AluSil alloy is evidently not a good enough material, and/or the coating on cylinder walls and pistons are not up to
  7. OK so the feedback from the Porsche service centre is that cyl no 3 is scored...very bad news. Their suggestion is new engine needed, whether a short or half engine... The price rel to car residual value means this is not a sensible option, unless I can get some contribution from Porsche.. So I need all the ammo I can get. Does anyone know of successful goodwill applications to Porsche (US, UK, EUR) in similar cases (6-7 year old car, 65k miles, owned from new etc..)? Also wonder what may have caused the scoring to occur; whilst it can be a tolerance issue it should not just show up all
  8. Thanks - will do over Easter... do you have any experience with this company...AWS GmbH, Auf'm Rottland 5, 57577 Hamm/Sieg...they apparently have a used engine with 76k km...risky business perhaps..
  9. Thanks both for your response. It seems that in most cases like this a scored cylinder has shown up. However, several experienced guys (Indys) I've shown the car to are pointing to a Cam or valve bucket related issue. The knock disappear over 1500 - 2000 rpm, which could suggest that oil pressure on idle isn't sufficient to get enough oil into this area (as rpm increase so does the oil pressure)..?? Or is that wishful thinking... Have you seen the Cam area being the cause of something like this? I'm in London where everything is a rip-off (except the Pound at the moment)... are there che
  10. Hi All, Have followed the forum occasionally and now have a question re a current problem .. My wife's Porsche Cayenne S - 2004 with 65k miles - owned from new - has developed an engine noise which initially sounded like valve ticking, but is now a more distinct engine knock. The symptom is a distinct ticking or knocking noise on every second rev (car idles very low at some 580 rpm at moment, giving some 290 knocks/minute. The knocking disappears at higher revs (> 1,500-2,000) but does not go away entirely when engine warms up. The knock appear to come from the right hand top area, but
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