996 Colonoscopy after IMS failure...
#18
Banned
peace of mind wise, most def i'd want a reman engine fresh outta porsche stuttgart than some service tech at a local dealer no matter how competent he/she may be. you cannot replicate the effort from factory in the service bay in podunk, usa.
#20
Race Director
Scoping sounds unlikely... In Porsche dealership service about a year...
Tucson Porsche has had my 2003 C4 for a week now following IMS failure with 11,400 miles on the clock.
Last week the service advisor indicated they were starting the process to replace the engine on my CPO warrantied car.
Yesterday, the service advisor called and said Porshe wanted them to use a camera scope to examine the inside of the engine - cylinders - to see if Porsche direction would be to repair or replace engine.
I'm unsure why, this makes me uncomfortable and feels like a high school lab experiment. And I am getting irritated that after 1 week, this is as far as we've gotten. I was settled on having my car back in another week with a reman engine, but seems like its not that simple.
Have any of you heard of this diagnostic before regarding IMS failure? Any recommendations on next steps I should take wrt to Porche / service advisor in terms of direction?
Last week the service advisor indicated they were starting the process to replace the engine on my CPO warrantied car.
Yesterday, the service advisor called and said Porshe wanted them to use a camera scope to examine the inside of the engine - cylinders - to see if Porsche direction would be to repair or replace engine.
I'm unsure why, this makes me uncomfortable and feels like a high school lab experiment. And I am getting irritated that after 1 week, this is as far as we've gotten. I was settled on having my car back in another week with a reman engine, but seems like its not that simple.
Have any of you heard of this diagnostic before regarding IMS failure? Any recommendations on next steps I should take wrt to Porche / service advisor in terms of direction?
Spotted various engine casting hanging around and then carts with Carrera engine internals laid out.
Short version is engine suffered IMS bearing failure.
New info -- at that time -- is new engine was not slam dunk. Porsche changed its practice.
Dealer tore down engine and disassembled engine -- not completely -- to determine if engine likely rebuild candidate.
If engine metal bits in high pressure pump, on bearing side of filter, if in scavenge pumps then no.
Also, an obviously broken engine casting might also be grounds for scraping engine.
If engine passed these checks then engine completely disassembled, cleaned, and all necessary parts replaced.
In this engine's case, new intermediate shaft and one maybe two chain guides (which were broken) were all that were required.
(I have picture and can possibly supply links. Haven't tried this but you can: Visit www.tinypics.com and search for M96 or M96 engine tags. Can't remember if I stored pics there with those tags or not.)
Sincerely,
Macster.
#21
Quote:
"you cannot replicate the effort from factory in the service bay in podunk, usa."
Any idea of the capital investment and ongoing overheads for a Porsche (or any) dealership?
Porsche AG. controls what happens to the repair of the engine. Under warranty, they make the decision. Bearing in mind the resposibility that the dealer accepts when rebuilding the engine, under factory or extended warranty, the statement about service bays in podunk, USA isn't very relevant.
"you cannot replicate the effort from factory in the service bay in podunk, usa."
Any idea of the capital investment and ongoing overheads for a Porsche (or any) dealership?
Porsche AG. controls what happens to the repair of the engine. Under warranty, they make the decision. Bearing in mind the resposibility that the dealer accepts when rebuilding the engine, under factory or extended warranty, the statement about service bays in podunk, USA isn't very relevant.
#22
Banned
GMS, that's all great for you... but if this was your car... youre telling me you wouldn't pull for a reman engine from porsche? you'd rather have the work of local service guys led by PCNA doing the rebuild of your nice sports car? it's completely relevant.
if u ever decided to sell your M96, you would be more comfortable telling the potential buyer this was rebuilt at the local porsche dealership or would you be more comfy telling them it got a fully updated engine from porsche factory w/ 0 miles?
if u ever decided to sell your M96, you would be more comfortable telling the potential buyer this was rebuilt at the local porsche dealership or would you be more comfy telling them it got a fully updated engine from porsche factory w/ 0 miles?
#26
Racer
Thread Starter
I'm trying to take this in stride wrt to where Porsche AG takes this, and have been told that if its a rebuild, the master mechanic at my dealer has 30 years of Porsche experience and is very good with these cars. I don't suspect I have a high influence level with Porsche AG, although I indicated to the dealer that at this point, I would prefer a reman.
However it gets sorted out, I'll still have 18 mos of warranty remaining, so I suspect if there are any weaknesses associated with a local motor rebuild (or a reman, for that matter), they will get exposed sooner rather then later.
Ultimately though, I just want to enjoy cruising in my car again, top down, with the engine smoothly running and not get overly consumed on if a rebuild is slightly worse then a reman or vice versa.
However it gets sorted out, I'll still have 18 mos of warranty remaining, so I suspect if there are any weaknesses associated with a local motor rebuild (or a reman, for that matter), they will get exposed sooner rather then later.
Ultimately though, I just want to enjoy cruising in my car again, top down, with the engine smoothly running and not get overly consumed on if a rebuild is slightly worse then a reman or vice versa.
#27
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
I wouldn't worry about the "camera scope" internal inspection of the engine. I've been in aviation maintenance for 23 years and we do borescope engines all the time for 1200 hour inspection or for finding causes of low torque outputs on engines combustion section walls and stator vanes, sompressor blades, etc.. to find cracks, chips and bend parts. Damage limits are very small. If its marginal, we change either the module or the whole engine. Of course I'm talking about aircraft engines.
Anyway, all I'm saying is the borsecope procedure is pretty simple. I wouldnt worry about it specially in a boxer(horizontally opposed) engine.
Anyway, all I'm saying is the borsecope procedure is pretty simple. I wouldnt worry about it specially in a boxer(horizontally opposed) engine.
#28
Banned
#29
Banned
but we're on rennlist cuz we are passionate about our 911s.... to this end, reman is the way to go.