Hi all,
Whilst under my car today I noticed a worrying amount oil loss from the rear main seal area. Now I have recently had both this and the oil cover plate replaced for the 2nd time in 8 months. It is becoming very apparent that this issue isn't result of dodgy servicing and may be something else. As such I was wondering what thoughts their are on why this may be occurring. I am led to believe it may be in relation to crankcase ventilation however I am unsure what parts control or assist in this process. Guidance would be loved.
Cheers sluts
Troubleshoot: Oil Leak
Started by B4AUS, Jan 30 2016 11:15 AM
11 replies to this topic
#2
OuTTback
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Posted 31 January 2016 - 09:46 PM
Keep it simple. Get the engine fully degreased. Get it thoroughly checked after 200k's and then get a second opinion. Subarus leak down from crankcase breathers, turbo oil returns, head gaskets, valve cover gaskets, sumps and just about everywhere else as it all gets blown backwards as you drive. Very hard to diagnose over the internet.
#3
B4AUS
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Posted 01 February 2016 - 08:52 AM
I've decreased then engine multiple times. I'm simply following directions from a trusted mechanic who believed this issue with the rear main seal being in relation to the crankcase pressure regulating system.
#4
OuTTback
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Posted 01 February 2016 - 10:40 AM
How many KM's on this engine?
#6
Jimbo
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Posted 01 February 2016 - 07:16 PM
Have you checked the oil feed/drain lines underneath the turbos?
'04 Liberty GT Premium "The Sprog Chariot"
#7
B4AUS
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Posted 01 February 2016 - 07:59 PM
Checked both turbos. No signs of leaking. It's appears to be very visually coming from the seal between engine/transmission
#8
B4AUS
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Posted 01 February 2016 - 09:02 PM
Have a feeling the PCV valve is the issue. Will be investigating tomorrow.
#9
Barbbachello
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Posted 01 February 2016 - 09:33 PM
Checked both turbos. No signs of leaking. It's appears to be very visually coming from the seal between engine/transmission
Sounds like either the rear main seal of the rear separator plate. Engine or box out to fix unfortunately
#10
B4AUS
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Posted 02 February 2016 - 06:26 PM
I'm aware that the oil would likely be leaking from there. But I had it replaced a week ago. Wouldn't a blocked pcv valve cause this to occur
#11
duncanm
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Posted 02 February 2016 - 06:45 PM
maybe they fooked up the install - easy to push the rear main seal too far in, or scratch the housing.
#12
OuTTback
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Posted 03 February 2016 - 10:08 AM
Or lip/groove in the crankshaft surface caused by the original seal.
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