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Message: I dont have time to go into a lot of detail, but a quick read suggests
Changed By: grant
Change Date: May 08, 2014 09:47AM
I dont have time to go into a lot of detail, but a quick read suggests
Change Date: May 08, 2014 09:47AM
I dont have time to go into a lot of detail, but a quick read suggests
1. those gurus are looking to make money. Spending more ($20k!!!!!!!) to rebuild a motor than it is possibly worth makes no sense. treat that advice as an advertisement.
2. Some of the suggested fixes are, in my opinion (let's see what Pedro and Marc think), questionable at best. Low temp thermostat? Huh? Under the toughest conditions most cars have the t-stat wide open anyway. Plus, cooler is not always better - in fact for day-to-day use it increases dilution and acid. IMNSHO, a terrible idea - pay to have it taken away
3. RMS, in 99.9% of cases, is a nuisance at worst. On the other hand, when you are in there, its $20 and takes 10 minutes
4. other things on your list are good "while you are in there" ideas, but hardly need discussion (clutch assembly, AoS, etc)
5. DoF - good idea
6. Chain pads - if you have easy access, good idea
7. Deep baffled sump like technosump - good idea if you track the car and are advanced enough to pull > 1G
8. lifters - never heard of this a a common, serious problem - noise? Sometimes, yea. So what?
9. Ovality - that's wear - go back to lubrication and don't run cars hard when they are cold Cold pistons are......oval. Parts only fit together properly at operating temperature.
finally, there is more and more evidence that says that part of the issue with M96 motors is that so many are garage queens, driven lightly. Couple this with stupidly long drain intervals from Porsche (sarcasm alert - "who has more at stake than us") and a IMS bearing that is subject to wear, AND a complex timing chain assembly, and we have recipe for trouble.
What to do? Simple:
1. routinely drive it long and hard enough to boil off that crap
2. change the oil twice as often, maybe more, with anything appropriate - steering clear of that hole
Grant
Grant
2. Some of the suggested fixes are, in my opinion (let's see what Pedro and Marc think), questionable at best. Low temp thermostat? Huh? Under the toughest conditions most cars have the t-stat wide open anyway. Plus, cooler is not always better - in fact for day-to-day use it increases dilution and acid. IMNSHO, a terrible idea - pay to have it taken away
3. RMS, in 99.9% of cases, is a nuisance at worst. On the other hand, when you are in there, its $20 and takes 10 minutes
4. other things on your list are good "while you are in there" ideas, but hardly need discussion (clutch assembly, AoS, etc)
5. DoF - good idea
6. Chain pads - if you have easy access, good idea
7. Deep baffled sump like technosump - good idea if you track the car and are advanced enough to pull > 1G
8. lifters - never heard of this a a common, serious problem - noise? Sometimes, yea. So what?
9. Ovality - that's wear - go back to lubrication and don't run cars hard when they are cold Cold pistons are......oval. Parts only fit together properly at operating temperature.
finally, there is more and more evidence that says that part of the issue with M96 motors is that so many are garage queens, driven lightly. Couple this with stupidly long drain intervals from Porsche (sarcasm alert - "who has more at stake than us") and a IMS bearing that is subject to wear, AND a complex timing chain assembly, and we have recipe for trouble.
What to do? Simple:
1. routinely drive it long and hard enough to boil off that crap
2. change the oil twice as often, maybe more, with anything appropriate - steering clear of that hole
Grant
Grant
Original Message
Author: grantDate: May 08, 2014 09:44AM
I dont have time to go into a lot of detail, but a quick read suggests
1. those gurus are looking to make money. Spending more ($20k!!!!!!!) to rebuild a motor than it is possibly worth makes no sense. treat that advice as an advertisement.
2. Some of the suggested fixes are, in my opinion (let's see what Pedro and Marc think), questionable at best. Low temp thermostat? Huh? Under the toughest conditions most cars have the t-stat wide open anyway. Plus, cooler is not always better - in fact for day-to-day use it increases dilution and acid. IMNSHO, a terrible idea - pay to have it taken away
3. RMS, in 99.9% of cases, is a nuisance at worst. On the other hand, when you are in there, its $20 and takes 10 minutes
4. other things on your list are good "while you are in there" ideas, but hardly need discussion (clutch assembly, AoS, etc)
5. DoF - good idea
6. Chain pads - if you have easy access, good idea
7. Deep baffled sump like technosump - good idea if you track the car and are advanced enough to pull > 1G
8. lifters - never heard of this a a common, serious problem - noise? Sometimes, yea. So what?
9. Ovality - that's wear - go back to lubrication and don't run cars hard when they are cold Cold pistons are......oval. Parts only fit together properly at operating temperature.
Grant
2. Some of the suggested fixes are, in my opinion (let's see what Pedro and Marc think), questionable at best. Low temp thermostat? Huh? Under the toughest conditions most cars have the t-stat wide open anyway. Plus, cooler is not always better - in fact for day-to-day use it increases dilution and acid. IMNSHO, a terrible idea - pay to have it taken away
3. RMS, in 99.9% of cases, is a nuisance at worst. On the other hand, when you are in there, its $20 and takes 10 minutes
4. other things on your list are good "while you are in there" ideas, but hardly need discussion (clutch assembly, AoS, etc)
5. DoF - good idea
6. Chain pads - if you have easy access, good idea
7. Deep baffled sump like technosump - good idea if you track the car and are advanced enough to pull > 1G
8. lifters - never heard of this a a common, serious problem - noise? Sometimes, yea. So what?
9. Ovality - that's wear - go back to lubrication and don't run cars hard when they are cold Cold pistons are......oval. Parts only fit together properly at operating temperature.
Grant