2002 A6 3.0L Low Oil Level Light - Bizarre Issue
01-11-2015, 09:38 AM
#11
AudiWorld Super User
I pulled up the 02 3.0 engine audi overall training (self study) and came up with one possible/probable issue related to sludging of the labyrinth separators in the head:
The cylinder head covers are rigid
assemblies with welded partitions. These
partitions cover the large breather
chambers and include integrated labyrinth
separators that act as oil separators for the
crankcase breather blow-by gases. This
reduces the amount of oil contained in the
recirculated exhaust gases.
My point is that if these passages are sludged up they will retard oil flow to the crankcase. OP could pull the cylinder head covers and visually inspect if not clean the large breather chambers or perhaps use a lighter synthetic oil (within audi use specs of course) or engine flush (sacrilege but there it is) with more frequent oil changes. Chances are OP is using a non-synthetic oil anyway.
The cylinder head covers are rigid
assemblies with welded partitions. These
partitions cover the large breather
chambers and include integrated labyrinth
separators that act as oil separators for the
crankcase breather blow-by gases. This
reduces the amount of oil contained in the
recirculated exhaust gases.
My point is that if these passages are sludged up they will retard oil flow to the crankcase. OP could pull the cylinder head covers and visually inspect if not clean the large breather chambers or perhaps use a lighter synthetic oil (within audi use specs of course) or engine flush (sacrilege but there it is) with more frequent oil changes. Chances are OP is using a non-synthetic oil anyway.
I'm cringing on that statement, I'm sure you meant excessive oil vapor in the intake system.
01-11-2015, 04:08 PM
#13
I would add a engine flush (Seafoam or other) then run gently till hot and drain the oil and change the filer.
Then run one grade lighter oil for about 100 to 500 miles (dive gently) and again add flush and change.
Then add a good synthetic and change one more time a bit early.
Then run one grade lighter oil for about 100 to 500 miles (dive gently) and again add flush and change.
Then add a good synthetic and change one more time a bit early.
01-12-2015, 05:23 AM
#14
AudiWorld Super User
No..thats a quote from Audi's input data to Bentley
01-12-2015, 06:29 AM
#15
AudiWorld Super User
01-12-2015, 06:50 AM
#16
AudiWorld Super User
I think you're right, it must have been an Audi typo.
Too expensive nowadays.
01-12-2015, 01:41 PM
#17
AudiWorld Super User
I've questioned Bentley customer support in the past and their reflex is that they just put in what Audi sends them. Typical. There hasn't been a decent car service manual since Motor essentially quit publishing them for specific cars/models. At least it appeared that someone other than the mfr was actually looking at the mfr data and really doing the repairs before publishing the data.
Too expensive nowadays.
Too expensive nowadays.
Sorry about my post #11 comment, what I meant was "I'm sure THEY meant excessive oil vapor in the intake system" not YOU, my bad typo.
01-13-2015, 04:26 AM
#18
AudiWorld Super User
i would have this addressed immediately as you are risking oil starvation issues that could end the life of your engine very quickly.
This issue very recently happened to someone here and he got quite the oil shower when he stuck a coat hanger up through the oil return tubes. I believe his was a 3.0 also .
This issue very recently happened to someone here and he got quite the oil shower when he stuck a coat hanger up through the oil return tubes. I believe his was a 3.0 also .
01-15-2015, 09:45 AM
#19
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I had the same thing happen to me once, where the oil pressure light came on. Checked the oil and it was a little low. put some in. check it again put some in, then I had a little to much. I thought maybe the screen in the sump was plugged so I took the oil pan off. Looked clean as a whistle in there no slug at all. Couldn't figure it out so I changed my oil and filter and the problem never came back, My guess is I had a bad oil filter, valve in the oil filter stayed open or something . So far it hasn't come back in a year