Crankshaft bearing
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Crankshaft bearing
I have a crankshaft bearing that has failed, resulting in an engine rebuld, costing thousands
Is this just a result of back luck?
My car is a MY99, factory everythig, besides a foam air filter.
It has 60.000 kms on the clock. The oil I use is Mobil 1 and replace it every 10.000 kms. Five days prior to the bairing failure I had replaced the spark plugs and oil & filter.
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third, ,then is started hearing a clicking noise, nothing to loawd, so I kept driving untill I could pull over.
When the car was in nutral and reved between 1000-2000 it made a loud clacking noise.
What can I do to prevent this happaning again?
Should I have gone for the motor rebuild or just replace the motor?
My motor oil was not over filled but it was on Max
I did see tha post from Gl WRX
"Capacity is 4.8 quarts. It's up to you. I'd drain it out because if the oil in the sump sloshes around and gets close enough (doesn't have to actually come in contact) to the crankshaft at high revs, it'll be whipped into a froth and some of those bubbles may be picked up by the oil pump. Air bubbles don't provide a very good oil film between bearing surfaces. This is why race cars with wet sumps use full-length scrapers and windage trays/screens to keep the oil in the sump away from the rotating mass."
Is this just a result of back luck?
My car is a MY99, factory everythig, besides a foam air filter.
It has 60.000 kms on the clock. The oil I use is Mobil 1 and replace it every 10.000 kms. Five days prior to the bairing failure I had replaced the spark plugs and oil & filter.
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third, ,then is started hearing a clicking noise, nothing to loawd, so I kept driving untill I could pull over.
When the car was in nutral and reved between 1000-2000 it made a loud clacking noise.
What can I do to prevent this happaning again?
Should I have gone for the motor rebuild or just replace the motor?
My motor oil was not over filled but it was on Max
I did see tha post from Gl WRX
"Capacity is 4.8 quarts. It's up to you. I'd drain it out because if the oil in the sump sloshes around and gets close enough (doesn't have to actually come in contact) to the crankshaft at high revs, it'll be whipped into a froth and some of those bubbles may be picked up by the oil pump. Air bubbles don't provide a very good oil film between bearing surfaces. This is why race cars with wet sumps use full-length scrapers and windage trays/screens to keep the oil in the sump away from the rotating mass."
Registered User
iTrader: (7)
Joined: Dec 2002
Posts: 10,029
From: Sacramento CA
Car Info: 02 Impreza WRX sedan
Originally posted by Carrot
I did see tha post from Gl WRX
"Capacity is 4.8 quarts."
<snip...>
That quote was from me. I was referring to the MY02 WRX in that particular thread. I don't know what the capacity is for the MY99, but if you have it at the MAX mark (when warm?) it isn't overfilled.
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third...
<snip...>
Do I understand you correctly? You were in 4th gear at 6k and then you downshifted into 3rd gear with a stock motor?? What's the factory redline on your motor and what were the revs just after the downshift?
--
0==WW==0
"…axles of evil…" - george w. bush
I did see tha post from Gl WRX
"Capacity is 4.8 quarts."
<snip...>
That quote was from me. I was referring to the MY02 WRX in that particular thread. I don't know what the capacity is for the MY99, but if you have it at the MAX mark (when warm?) it isn't overfilled.
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third...
<snip...>
Do I understand you correctly? You were in 4th gear at 6k and then you downshifted into 3rd gear with a stock motor?? What's the factory redline on your motor and what were the revs just after the downshift?
--
0==WW==0
"…axles of evil…" - george w. bush
Registered User
iTrader: (12)
Joined: Nov 2002
Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by Wingless Wonder
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third...
<snip...>
Do I understand you correctly? You were in 4th gear at 6k and then you downshifted into 3rd gear with a stock motor?? What's the factory redline on your motor and what were the revs just after the downshift?
--
0==WW==0
"…axles of evil…" - george w. bush
When it did happen I was driving it hard, Rev it to 6000 and downshifted to third...
<snip...>
Do I understand you correctly? You were in 4th gear at 6k and then you downshifted into 3rd gear with a stock motor?? What's the factory redline on your motor and what were the revs just after the downshift?
--
0==WW==0
"…axles of evil…" - george w. bush
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Red line is 7000
The oil was at max when cold
I was braking and down shifted from 5th to 3rd and blip the accelerator so I could get a smooth gear change when I released the clutch
Maybe Subaru’s are not bullet proof after all
I read this acticle on
http://groups.msn.com/SubaruClubMala...odbearing.msnw
"Wat is the most common ailment faced by our engines? Make a guess. The Scooby boxer is generally very reliable and you don't really get cases of burnt gasket etc. So when they do go wrong one of the common ones is con-rod bearing failure.
This is the crankshaft. The con rod bearing is actually two- half moon cylindrical pieces and they are fitted inside each connecting rod itself. The tiny orifices is where the con-rod bearing will seat. During running, engine oil under pressure will come out through the small holes. It is under high pressure that the bearings will actually be "floating" in between the crankshaft and the con-rod itself.
The bearing on the left is how it should look like. The one on the left (golden) are totally shot. When this happens, your engine will make a clack-clack-clack sound meaning the engine has gone bust. Rebuild!"
The oil was at max when cold
I was braking and down shifted from 5th to 3rd and blip the accelerator so I could get a smooth gear change when I released the clutch
Maybe Subaru’s are not bullet proof after all
I read this acticle on
http://groups.msn.com/SubaruClubMala...odbearing.msnw
"Wat is the most common ailment faced by our engines? Make a guess. The Scooby boxer is generally very reliable and you don't really get cases of burnt gasket etc. So when they do go wrong one of the common ones is con-rod bearing failure.
This is the crankshaft. The con rod bearing is actually two- half moon cylindrical pieces and they are fitted inside each connecting rod itself. The tiny orifices is where the con-rod bearing will seat. During running, engine oil under pressure will come out through the small holes. It is under high pressure that the bearings will actually be "floating" in between the crankshaft and the con-rod itself.
The bearing on the left is how it should look like. The one on the left (golden) are totally shot. When this happens, your engine will make a clack-clack-clack sound meaning the engine has gone bust. Rebuild!"
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