con rod bearings
#1
Three Wheelin'
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Here are some pics of my con rod bearings for reference. These are out of a '92 968 with about 160K miles and quite a few track days. The clearances on all four bearings were well within spec.
What is not as clear in the pictures is the difference in wear between #1/#2 and #3/#4. There is clearly more wear on the #1/#2 bearings than the #3/#4 bearings.
Enjoy!
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0001.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0002.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0003.jpg)
#4
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0004.jpg)
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0005.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0006.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0007.jpg)
#4
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0009.jpg)
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0018.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0019.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0020.jpg)
#4
What is not as clear in the pictures is the difference in wear between #1/#2 and #3/#4. There is clearly more wear on the #1/#2 bearings than the #3/#4 bearings.
Enjoy!
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0001.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0002.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0003.jpg)
#4
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0004.jpg)
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0005.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0006.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0007.jpg)
#4
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0009.jpg)
#1
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0018.jpg)
#2
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0019.jpg)
#3
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0020.jpg)
#4
![](http://i69.photobucket.com/albums/i62/chrisluckett/968/rod%20bearings/DSC_0021.jpg)
#2
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Not even a hint of copper showing at 160k miles. These motors truly are good for 200k miles before possibly needing a rebuild.
What kind of oil do you use?
What kind of oil do you use?
#4
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Mobil 1, as in the fully synthetic type? I have heard in recent years their formula has changed and isn't exactly the best synthetic stuff out there anymore. But I believe their dino oil formula has not changed.
Regardless it seems Mobil 1 did a great job in your engine.
Regardless it seems Mobil 1 did a great job in your engine.
#6
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Full synthetic. Aren't internet rumors great fun? I heard Elvis is living with JFK in Zimbabwe.
#7
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If you don't like internet rumors why are you online.
Here's what I learned with a few minutes of research. Who is to say that any of this information I found is factual. I have chosen to trust the information on the amsoil, mobil, and other websites.
When Exxon and Mobil mergered 8 years ago, Exxon had a huge impact on the marketing and development on Mobil's products. ExxonMobil has since reformulated its synthetic motor oil too many times to count, and has been through stints where they release new formulas and immediately recall them, only to continue selling the old version until they can fix it.
There was a whole fuss about Castrol's synthetic oils not actually being based on synthetic bases, and Mobil sued them. When Castrol won and was legally allowed to get away with calling a refined dino oil "synthetic", Mobil started doing the same thing, to save money.
In the early 2000's Mobil 1 was sometimes risky and seemingly a different formula every week. I think they have settled down and are finally making good reliable products again since mid 2000's.
In the end the best oil in all regards is amsoil. Other great brands you can grab off the shelf would be mobil 1 and valvoline synpower. Castrol syntec is pretty good too. All have varying strengths and weaknesses but mobil 1 and valvoline synpower are both great oils. Mobil is the most popular champion oil so people like to buy it. As far as dino oils, the best off the shelf stuff would be mobil clean and valvoline.
Here's what I learned with a few minutes of research. Who is to say that any of this information I found is factual. I have chosen to trust the information on the amsoil, mobil, and other websites.
When Exxon and Mobil mergered 8 years ago, Exxon had a huge impact on the marketing and development on Mobil's products. ExxonMobil has since reformulated its synthetic motor oil too many times to count, and has been through stints where they release new formulas and immediately recall them, only to continue selling the old version until they can fix it.
There was a whole fuss about Castrol's synthetic oils not actually being based on synthetic bases, and Mobil sued them. When Castrol won and was legally allowed to get away with calling a refined dino oil "synthetic", Mobil started doing the same thing, to save money.
In the early 2000's Mobil 1 was sometimes risky and seemingly a different formula every week. I think they have settled down and are finally making good reliable products again since mid 2000's.
In the end the best oil in all regards is amsoil. Other great brands you can grab off the shelf would be mobil 1 and valvoline synpower. Castrol syntec is pretty good too. All have varying strengths and weaknesses but mobil 1 and valvoline synpower are both great oils. Mobil is the most popular champion oil so people like to buy it. As far as dino oils, the best off the shelf stuff would be mobil clean and valvoline.
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#8
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If you don't like internet rumors why are you online.
Here's what I learned with a few minutes of research. Who is to say that any of this information I found is factual. I have chosen to trust the information on the amsoil, mobil, and other websites.
When Exxon and Mobil mergered 8 years ago, Exxon had a huge impact on the marketing and development on Mobil's products. ExxonMobil has since reformulated its synthetic motor oil too many times to count, and has been through stints where they release new formulas and immediately recall them, only to continue selling the old version until they can fix it.
There was a whole fuss about Castrol's synthetic oils not actually being based on synthetic bases, and Mobil sued them. When Castrol won and was legally allowed to get away with calling a refined dino oil "synthetic", Mobil started doing the same thing, to save money.
In the early 2000's Mobil 1 was sometimes risky and seemingly a different formula every week. I think they have settled down and are finally making good reliable products again since mid 2000's.
In the end the best oil in all regards is amsoil. Other great brands you can grab off the shelf would be mobil 1 and valvoline synpower. Castrol syntec is pretty good too. All have varying strengths and weaknesses but mobil 1 and valvoline synpower are both great oils. Mobil is the most popular champion oil so people like to buy it. As far as dino oils, the best off the shelf stuff would be mobil clean and valvoline.
Here's what I learned with a few minutes of research. Who is to say that any of this information I found is factual. I have chosen to trust the information on the amsoil, mobil, and other websites.
When Exxon and Mobil mergered 8 years ago, Exxon had a huge impact on the marketing and development on Mobil's products. ExxonMobil has since reformulated its synthetic motor oil too many times to count, and has been through stints where they release new formulas and immediately recall them, only to continue selling the old version until they can fix it.
There was a whole fuss about Castrol's synthetic oils not actually being based on synthetic bases, and Mobil sued them. When Castrol won and was legally allowed to get away with calling a refined dino oil "synthetic", Mobil started doing the same thing, to save money.
In the early 2000's Mobil 1 was sometimes risky and seemingly a different formula every week. I think they have settled down and are finally making good reliable products again since mid 2000's.
In the end the best oil in all regards is amsoil. Other great brands you can grab off the shelf would be mobil 1 and valvoline synpower. Castrol syntec is pretty good too. All have varying strengths and weaknesses but mobil 1 and valvoline synpower are both great oils. Mobil is the most popular champion oil so people like to buy it. As far as dino oils, the best off the shelf stuff would be mobil clean and valvoline.
Something to think about..
Raj
#9
Three Wheelin'
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I change my rod bearings on a regular basis, every other year...have the cross member to facilitate the job, and save the cost of the many hours of laborat my shop...Actually, they were the ones who reccommended it as a labor/money saver!
Jason
Jason
#10
Three Wheelin'
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This is where you can get more info then you ever wanted to know about oil. The are quite a few industry professionals on the forum there.
http://www.bobistheoilguy.com/
#11
Three Wheelin'
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Do you use the lindsey crossmember? Any issues with it?
#12
Three Wheelin'
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Chris,
Yes, it's the Lindsey unit...no problems whatsoever.
I track my car exclusively, it's not street legal these days. I do the bearings as part of a regular winter maintenance on the car.
Keep in mind that I've built it up to turbo-rs spec...little more heat and such.
Jason
Yes, it's the Lindsey unit...no problems whatsoever.
I track my car exclusively, it's not street legal these days. I do the bearings as part of a regular winter maintenance on the car.
Keep in mind that I've built it up to turbo-rs spec...little more heat and such.
Jason
#14
Three Wheelin'
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Ah, sorry...forgot about that part.
The first time I changed them, which was after about 3 years on the new engine, there was a good amount of wear on them, and I felt lucky that I had taken the advice of my new mechanic/shop and looked at them!
Since that time, we have not seen especially significant scoring, wear, or any such damage. So, every other year seems to be about right for now.
Jason
The first time I changed them, which was after about 3 years on the new engine, there was a good amount of wear on them, and I felt lucky that I had taken the advice of my new mechanic/shop and looked at them!
Since that time, we have not seen especially significant scoring, wear, or any such damage. So, every other year seems to be about right for now.
Jason