to change or not to change bearings at 92k??

[coloradoe92m3]

So I've had 2011 since new. Dct, tuned and cat less. No track bug beat up on pretty good and is daily driver. Have had zero engine related issues aside from valve cover gasket once. I used tws until 60k miles and this last 1.5 I've used tws summer and m1 0w40 winter.

Car drivers great. Data logs hit timing well and smooth as ever.

I don't trust a Blackstone oil report to be the deciding factor.

My dilemma is clearly I have a decent set of bearings to get to 90k mikes of harddriving so does opening up engine and putting new bearings risk that new bearings will be such that clearances are tighter or installed not perfectly?

Part of me wants to leave them to 150k or 2 more years than change as 150 k is more normal bearing life.

I have seemed to notice people who ddaily drive car and baby it or don't drive it often seem to be ones with bearing failure. Especially if they typically baby it and than do track or occasional hard runs.

I've beat it up every day for past 3 years. Only rules are oil change every 5, air filter every 10 and always let oil warm up fully before going full out

[BobS]

Why don't you trust the oil analysis reports? I would just keep going and get a oil analysis every other oil change.

[rocket_science]

Mine has 16k on it and I am changing out for some VAC..

Then again, I will have a lot more hp soon!

[Vic311]

Change them if you plan on keeping the car. We have seen how poor these bearings look with half the mileage you've put on them.

[W///]

Originally Posted by coloradoe92m3

So I've had 2011 since new. Dct, tuned and cat less. No track bug beat up on pretty good and is daily driver. Have had zero engine related issues aside from valve cover gasket once. I used tws until 60k miles and this last 1.5 I've used tws summer and m1 0w40 winter.

Car drivers great. Data logs hit timing well and smooth as ever.

I don't trust a Blackstone oil report to be the deciding factor.

My dilemma is clearly I have a decent set of bearings to get to 90k mikes of harddriving so does opening up engine and putting new bearings risk that new bearings will be such that clearances are tighter or installed not perfectly?

Part of me wants to leave them to 150k or 2 more years than change as 150 k is more normal bearing life.

I have seemed to notice people who ddaily drive car and baby it or don't drive it often seem to be ones with bearing failure. Especially if they typically baby it and than do track or occasional hard runs.

I've beat it up every day for past 3 years. Only rules are oil change every 5, air filter every 10 and always let oil warm up fully before going full out

Why wouldn't you trust Blackstone? Makes no sense to me.
In my case, I don't plan on opening up my engine until the lead really shows up or if I'm really high mileage (more like 150k).

While Blackstone is probably not perfect solution, that's all we have.

[BPMSport]

We have customers with over 150k on the clock.

That said, I would definitely do a blackstone report and if all looks good, don't change them.

If it does indicate something, then probably a good idea to have it done.

It's obviously not a perfect indicator but it is useful to a degree.

[BobS]

I think people are terrified of bearings going bad from some of the issues/threads on this forum but in reality, if you just monitor the oil analysis reports every couple oil changes, use approved oil, let the car warm up to operating temp before driving hard, and change your oil frequently (IMO every 5k), then you should be fine.

[s85e90]

If it ain't broke................ Silly to take it apart IMO

[coloradoe92m3]

Re: oil analysis, I thought the newer bearings which I have, don't have any lead and nobody is clear on what metal to monitor so a low lead level would be no value.

If I'm wrong and someone can tell me what metal to keep an eye on?

Nobody addressed the problem inherent in getting a worse batch of bearings. Given many fail with less than 20k miles, I could end up putting bearings with less clearance than what I have even if worn.
.I guess there is no easy answer. I plan on keeping this car forever as a classic in my stable so I want it to last. If engine blows I would rebuild it with lighter parts and keep it n/a only use super light parts and bump redline to 8800

[dpgfunk]

If it aint broke, dont fix it

[Hujan]

Originally Posted by s85e90

If it ain't broke................ Silly to take it apart IMO

Originally Posted by dpgfunk

If it aint broke, dont fix it

Wise words.

If you've been taking good care of it and the oil analyses say it's healthy, leave her be.