996 Genuine Porsche replacement engine question
Discussion
Hello,
I know this is yet another 996/997 engine topic, and for that I apologise.... I have read so many posts on both this forum, and Rennlist and others.... But I have a specific question, and I know that there are some pretty qualified members that read/comment/post on here...
I am interested in a car that is for sale. A 3.6 mk2 996. It is reputed to have (and I will do checks to confirm) a genuine Porsche replacement engine in 2008, at 70,000, from Sports and Classic (I have emailed them, and will check to see what they say) It in now on 110,000. The servicing history of the NEW engine appears to be satisfactory.
Question 1.) Do we think the engine will have been fitted with the later (fitted from 2006 onward's to 997 engines) IMS shaft and larger bearing?
I take in everything that Baz from Hartech, and others have to say about bore score. ie. it starts with an "Event" which over time wears the bore further at a presumably exponential rate until engine failure. This "Event" can be the result of abuse ie thrashing from cold, or overheating, poor oil servicing, etc. In any case the oil film between the piston skirt and cylinder wall breaks down allowing piston to bore contact, and damage.
Question 2.) - Assuming engine is borescoped and pronounced ok, (I accept that a borescope isn't able to see the state of the piston skirts). And the DME doesn't show type 2 over revs within 300 hours.
From then on, the engine is looked after properly.... LLT, regular oil changes with 10W50 Millers NT. Not thrashed from cold or from idle. What do we think about the projected longevity of the engine?
To give you perspective, I'm looking to purchase a car to keep....... not to sell later. I know one day it'll need a rebuild. At that point I'll spend good money on a proper job. ie a Solution, not a recondition. But in the meantime, I need to think how long I've got to save up!
Your comments please.
Many thanks, Jim
I know this is yet another 996/997 engine topic, and for that I apologise.... I have read so many posts on both this forum, and Rennlist and others.... But I have a specific question, and I know that there are some pretty qualified members that read/comment/post on here...
I am interested in a car that is for sale. A 3.6 mk2 996. It is reputed to have (and I will do checks to confirm) a genuine Porsche replacement engine in 2008, at 70,000, from Sports and Classic (I have emailed them, and will check to see what they say) It in now on 110,000. The servicing history of the NEW engine appears to be satisfactory.
Question 1.) Do we think the engine will have been fitted with the later (fitted from 2006 onward's to 997 engines) IMS shaft and larger bearing?
I take in everything that Baz from Hartech, and others have to say about bore score. ie. it starts with an "Event" which over time wears the bore further at a presumably exponential rate until engine failure. This "Event" can be the result of abuse ie thrashing from cold, or overheating, poor oil servicing, etc. In any case the oil film between the piston skirt and cylinder wall breaks down allowing piston to bore contact, and damage.
Question 2.) - Assuming engine is borescoped and pronounced ok, (I accept that a borescope isn't able to see the state of the piston skirts). And the DME doesn't show type 2 over revs within 300 hours.
From then on, the engine is looked after properly.... LLT, regular oil changes with 10W50 Millers NT. Not thrashed from cold or from idle. What do we think about the projected longevity of the engine?
To give you perspective, I'm looking to purchase a car to keep....... not to sell later. I know one day it'll need a rebuild. At that point I'll spend good money on a proper job. ie a Solution, not a recondition. But in the meantime, I need to think how long I've got to save up!
Your comments please.
Many thanks, Jim
I don't know, but from posts I read while researching, I think it will have the original type engine and ims.
You can boroscope and establish the condition on the day, but you might well see 40000 miles of wear. One specialist I spoke to said he never boroscopes anything because they all show something, another said if you buy a 6.2 get the engine rebuilt straight away!
Did the owner who had the engine fitted keep the car? Did their driving habits change?
Personally I think if it's the right car and it doesn't rattle, knock or smoke, take the risk and enjoy it.
You can boroscope and establish the condition on the day, but you might well see 40000 miles of wear. One specialist I spoke to said he never boroscopes anything because they all show something, another said if you buy a 6.2 get the engine rebuilt straight away!
Did the owner who had the engine fitted keep the car? Did their driving habits change?
Personally I think if it's the right car and it doesn't rattle, knock or smoke, take the risk and enjoy it.
Regarding your first question, I recently asked PorscheGB about the same issue as I have a 986S which has a replacement engine from Porsche. The original engine failed in December 2008 and was too badly damaged to risk repair according to Autofarm. A shiny "new" engine was supplied by Porsche from Germany and fitted within a week. I do not know if it was a brand new engine or reconditioned but it came with a certificate in German giving its build date as late 2007. The car was out of warranty so I had to pay for everything.
A few months ago I asked PorscheGB if they could confirm if the "new" engine fitted to my 986 had the updated Ims bearing fitted to all new 987s from 2007, I also sent them a copy of the certificate that came with the engine. PorscheGB's reply was that they couldn't confirm if the engine fitted to my 986 has the updated Ims bearing/shaft but it was normal practice to fit the updated design on replacement engines at that time.
I hope the above helps. It would be worth checking if the 996 for sale comes with a certificate for the replacement engine confirming its authenticity and build date.
A few months ago I asked PorscheGB if they could confirm if the "new" engine fitted to my 986 had the updated Ims bearing fitted to all new 987s from 2007, I also sent them a copy of the certificate that came with the engine. PorscheGB's reply was that they couldn't confirm if the engine fitted to my 986 has the updated Ims bearing/shaft but it was normal practice to fit the updated design on replacement engines at that time.
I hope the above helps. It would be worth checking if the 996 for sale comes with a certificate for the replacement engine confirming its authenticity and build date.
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