Crank bearings - safe mileage

[Tomak]

Crank bearings - safe mileage

Hello,

 

I have rebuild my engine some time ago in R33 GTR and done already 60 000km putting new nominal crankshaft and ACl bearings. I was visiting lately one drift shop with lots of experience in Rb26 engines. They say its already time to change the bearings cuz they like to spun. True or not true and when to change them? I am using my car for daily driving and 2-3 times track days a year. Can i go up to 100 000km without any fears or should i change them now.?

 

[KiwiRS4T]

They sound like shysters - avoid them.

[Dobz]

That's right, a spun bearing will be the result of a bad build, lack of proper maintenance or oil starvation. Your bearings should be fine, just keep maintenance up and be sure you aren't losing oil pressure at the track due to oil surge.

[Tomak]

ok, ok, thanks for advices. But i really didint get the answer to my question. What is the safe milage for the bearings since you can not use them for ever... 

[KiwiRS4T]

8 hours ago, Tomak said:

ok, ok, thanks for advices. But i really didint get the answer to my question. What is the safe milage for the bearings since you can not use them for ever... 

There is no answer...they might last 300,000 or not. Just keep an eye on your oil pressure and learn what worn bottom end sounds like.

[89CAL]

I think they are classed as a 'life of the engine' part, as above, no designated working life.

If you were really worried, why didn’t you call or email ACL and ask them?

[KiwiRS4T]

14 hours ago, Tomak said:

since you can not use them for ever... 

In theory you can... because a film of oil is supposed to separate the moving parts.

[Tomak]

ok, thanks