[STS] Engine Failure - Failed OEM Oil Pump?
05-06-2008, 08:15 AM
#22
while that is a factory oem oil pump, it was not on a stock motor. just to make that clear. would have a lot more stress being given to it on a built motor.
well if it was two weeks after a new turbo install, i would have to agree with J and say that it had to be low oil or oil contamination..
well if it was two weeks after a new turbo install, i would have to agree with J and say that it had to be low oil or oil contamination..
05-06-2008, 08:17 AM
#23
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Originally Posted by Audible Mayhem
while that is a factory oem oil pump, it was not on a stock motor. just to make that clear. would have a lot more stress being given to it on a built motor.
well if it was two weeks after a new turbo install, i would have to agree with J and say that it had to be low oil or oil contamination..
well if it was two weeks after a new turbo install, i would have to agree with J and say that it had to be low oil or oil contamination..
05-06-2008, 08:28 AM
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Originally Posted by goosegoose
Being that I checked the oil level hours before the motor failure, and it did not read low, does that narrow down the most probably cause to oil contamination?
What filter do you use?
05-06-2008, 08:38 AM
#25
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Originally Posted by goosegoose
Being that I checked the oil level hours before the motor failure, and it did not read low, does that narrow down the most probably cause to oil contamination?
Like I said, 9 months no problems..2 weeks after install and retune, problems..To much coincidence for me to overlook..
05-06-2008, 08:42 AM
#26
Originally Posted by Julian@MRC
The oil pressure upon intital start up and then reducing as the engine oil warmed up, tells a tale of incresed bearing clearances as the engine warmed up..
05-06-2008, 09:14 AM
#29
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Originally Posted by Julian@MRC
Not if the oil was incorrectly read on the stick. Are you 100% sure of your abilities to read the oil? Because I even find it a challange to get that dipstick out at times and read the oil level properly...
Like I said, 9 months no problems..2 weeks after install and retune, problems..To much coincidence for me to overlook..
Like I said, 9 months no problems..2 weeks after install and retune, problems..To much coincidence for me to overlook..
I check the oil level with much paranoid obsession now.
05-06-2008, 09:33 AM
#30
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Originally Posted by Audible Mayhem
did you drop the oil pan yourself? did you drain the oil before shipping it?
just wondering how much was in there...
basically three things could have happened...
you could have just had low oil pressure due to the fact it has to send it all the way to the back of the car to the turbo.
you could have hit something that caused an oil leak and ran the car low on oil.
or you could have gotten dirt, RTV, or some sort of junk in the pickup or through the bearings which would let less oil flow through the oil passages and cause it to have low pressure and less flow, causing everything to heat up and ruin every bearing/rotating part...
not ruling out the oil pump but we have done well over 100 stock motor FI VQs in the past year and havent seen one fail...
good luck with your new build. i am sure you are in good hands.
just wondering how much was in there...
basically three things could have happened...
you could have just had low oil pressure due to the fact it has to send it all the way to the back of the car to the turbo.
you could have hit something that caused an oil leak and ran the car low on oil.
or you could have gotten dirt, RTV, or some sort of junk in the pickup or through the bearings which would let less oil flow through the oil passages and cause it to have low pressure and less flow, causing everything to heat up and ruin every bearing/rotating part...
not ruling out the oil pump but we have done well over 100 stock motor FI VQs in the past year and havent seen one fail...
good luck with your new build. i am sure you are in good hands.
Last edited by go-fast; 05-06-2008 at 10:11 AM.
05-06-2008, 10:09 AM
#31
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Originally Posted by go-fast
+1 -the remote turbo/long distance
Edit: Sam also mentioned it was clogged so how is the distance related to the pump clogging?
Last edited by athenG; 05-06-2008 at 10:13 AM.
05-06-2008, 10:13 AM
#32
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Originally Posted by athenG
I'm not to familiar with the TN Kit but how does it get its oil? The distance from the oil filter going to the turbo which are pretty much in the same level are not that long. There are other STS who has 2-3 times more miles than goose and me and have not had a problem.
05-06-2008, 10:17 AM
#34
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Im gonna say if it was oil starvation, it would have killed the turbo first, being it was the farthest from the oil source and would ultimately get oil last in line...
05-06-2008, 10:24 AM
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a remote oil tank with its own oil system is not a bad idea though,it would prevent cross contamination.you could also better control the turbo's enviroment with it's own cooler and pancake fan.turbo bike guy's do this regular.
05-06-2008, 05:53 PM
#37
I'm not sure about the remote location not being a problem. I'm sure this taps into the system right at the sending unit like most systems do. The problem I see is if the remote turbo has no restrictor or too small of a restrictor it would allow too much flow away from the bearing journals inspite of the fact that the gage is indicating sufficient pressure. Looking at the service manual the sending unit is right at the oil filter so the turbo splits the oil supply with the rest of the engine, definatly not the last thing supplied.
Picture it like a house that the hot water is not plummed properly, somebody flushes the toilet when you're having a hot shower and it suddenly turns cold or scalding hot. I've only seen one of these installed and it was in a chevy truck and it had it's own oil system.
I can't tell a lot from the photos, any idea which one's failed first? I would think the rear of the engine moving to the front as pressure dropped.
Picture it like a house that the hot water is not plummed properly, somebody flushes the toilet when you're having a hot shower and it suddenly turns cold or scalding hot. I've only seen one of these installed and it was in a chevy truck and it had it's own oil system.
I can't tell a lot from the photos, any idea which one's failed first? I would think the rear of the engine moving to the front as pressure dropped.
Last edited by fklentz; 05-06-2008 at 06:09 PM.
05-06-2008, 06:45 PM
#38
Originally Posted by Julian@MRC
I happened there...
7800rpms, + 6500 RPM launch control..
7800rpms, + 6500 RPM launch control..Thanks for any clarification just trying to work out where the stock pump becomes a limitation.
Last edited by mchapman; 05-06-2008 at 11:05 PM.
05-06-2008, 06:46 PM
#39
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Originally Posted by Audible Mayhem
i cant believe you found a bunch of red X's in your motor... 
good luck with the build, let us know if we can do anything for you. oil pressure is really tricky in these cars. not usually an issue with a stock motor but who knows when you have to pump oil soo far away from the engine.
good luck with the build, let us know if we can do anything for you. oil pressure is really tricky in these cars. not usually an issue with a stock motor but who knows when you have to pump oil soo far away from the engine.
05-06-2008, 07:05 PM
#40
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Originally Posted by g35driver2003
Tell me about it, oil pressure is a b!!tch for my g35 and I have already upgraded to a Walbro fuel pump lol