Big end bearing failure! Study for Engineering Degree

[SAS]

Hi guys, im doing a bit of research for a project im doing on big end bearing failures. Im sure all of us have had this happen at least once haha, I no I have! Comments welcome!

[B4 2000]

I Vote NOT YET, engine done 172500 kms :)

[SAS]

Also reasons as to why you ran a bearing would be much appreciated

[SAS]

 B4 2000 said:

I Vote NOT YET, engine done 172500 kms :)

Lol valid point! I added a NOT YET option 4 ya haha

[Koom]

Need more options of things like how often do you change your oil, check the oil level, use the correct fuel, has your afm broken/played up, do you run more boost that standard, factory motor or rebuilt already etc etc

Only had one bearing failure in ~150k kms of Subaru driving, including trackdays, and that was due to a warped crank being used in a rebuilt motor I'd purchased for bugger all. Engine lasted a couple of weeks.

[MercuryFree]

Not yet that I know of. Car has done 217,000

[Guest]

Iv never had a Subaru run a bearing on me yet, as long as its running safe with good oil I don't see why they should go.. of course theres the exception when they do just go, but I reckon most of them are due to bad maintaince /fuel and "Crank the boost up g" lol

[Guest]

 Koom said:

Need more options of things like how often do you change your oil, check the oil level, use the correct fuel, has your afm broken/played up, do you run more boost that standard, factory motor or rebuilt already etc etc

Also different models are more prone to the problem at different km's

[Guest SPANKU]

i know a lot people done their bearing between 120-150k only one or two done 90-100km and one thats done at 55k

[NotAWhiteGTB]

 Koom said:

Need more options of things like how often do you change your oil, check the oil level, use the correct fuel, has your afm broken/played up, do you run more boost that standard, factory motor or rebuilt already etc etc

Agreed

Mine went because my head gasket went and motor got WAY to hot.

[wrx_lou]

Mine went due to running rich by installing a larger turbo and not tuning properly. I changed my oil every 5000kms and before I owned it, it was maintained by wingers.

[Joker]

not yet, had the car since 2003+ fresh import 103,000km,s hitting 200,000 this year!

Standard GTB slightly raised boost - seviced when stickers say its due (or just after)

[GC8E2DD]

~195,000kms, presumed oil starvation.

[madmike]

 GC8E2DD said:

~195,000kms, presumed oil starvation.

Commentary of said event.....

vroom vroom SCREECH.......

Nung Nung CLUNK!!!!

LOL!!

Sorry Sam..

[Drunkenmonkey]

89 gt 298000 kms and not yet!!!

98 gtb 162000 kms and not yet

[D-Style]

My cars

'01 blitzen 130kms Oil pick-up was blocked

Other cars i know about

'97 WRX STi 90kms lack of servicing

'92 RS over-rev

'90 RS Wrong Bearings used in Rebuild (bearings were to "Loose")

Who Remembers former member Koro? "03 WRX BEB at 35 kms. Ended up rage quiting CS over this.

[smokn4]

i gotta 93 V1 just hit 240,000 - NOT YET ;D

[Guest DMSREX]

MY99 owned since 2001 bought with about 20k kms on it now done 155k kms and "Not Yet" still going strong actually.

[dimin]

On my third subaru now, and none of them have run bearings. Oil changed at 5000ks at the most and all of them been run on 98 octane, both of which probly help alot in not destroying the bottom end.

[T.Rev]

Im in the leading group of 3 votes...woohoo.

[MercuryFree]

 T.Rev said:

Im in the leading group of 3 votes...woohoo.

I think 'not yet' is the leading group

[Old Skool Subbie]

 MercuryFree']

[quote name='T.Rev said:

Im in the leading group of 3 votes...woohoo.

/quote]

I think 'not yet' is the leading group

Im in the not yet ( never happen lol ) group. Ive never blown anything on a motor.. apart from having a waterpump sieze

[GC8E2DD]

 madmike']

[quote name='GC8E2DD said:

~195,000kms, presumed oil starvation.

/quote]

Commentary of said event.....

vroom vroom SCREECH.......

Nung Nung CLUNK!!!!

LOL!!

Sorry Sam..

Hah, well I guess it was inevitable. Baffled sump next time ;]

[Stoffa]

mine went on the track at 140,000kms, had a vacuum line pop off the map sensor, was running profec forcing it to boost at 18psi while the ECU thought it wasn't boosting.

Causing it to lean ouit in a big way (white exhaust valves and exhaust housing) too much detonation and bearing go bye bye

[thorpy]

BG5 GTB

21psi on stock turbos , thats all