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2007 Forester
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4 Posts
Discussion Starter · #1 ·
I have a 07 Forester 2.5L non-turbo. Over the last year or so it has developed a very small oil leak on top of the passenger side cylinder head. I have included a couple photos of where the oil is puddling. The leak is only about half a quart a month, so it is not terrible. The problem is that the oil splatters back with the wind, landing on my exhaust which leads to the smell of burning oil when the vehicle is stopped.

I know that the oil pressure sending unit is near the puddling but the area around that sensor seems to be devoid of oil. I know that the head gaskets on this model of engine has a tendency to go out as well but I am not getting any smoke out of the exhaust and I have has a few mechanics tell me that if the gasket had gone out, then the oil would be leaking from the bottom and not puddling on top of the cylinder head.

I put oil dye in a while back to try to find the spot of the leak but I haven't found it yet.

Anyone have any ideas of where I should check or what the likely problem is?

Thanks

Ian
 

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2007 Forester
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4 Posts
Discussion Starter · #2 ·
After some more research and another look at the engine, the oil does not seem to be coming from the oil pressure sensor. The oil seems to be coming from under the power steering pump. It is definitely engine oil and not PS fluid.

Is there a reason that engine oil would be leaking from the PS pump?
 

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2007 Forester
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4 Posts
Discussion Starter · #5 ·
\ It is definitely engine oil and not PS fluid. Also, neither the check engine light or the oil pressure light has come on. No codes are stored.
 

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Super Moderator
2001 Forester S, 4EAT
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3,354 Posts
I have a 07 Forester 2.5L non-turbo. Over the last year or so it has developed a very small oil leak on top of the passenger side cylinder head. I have included a couple photos of where the oil is puddling. The leak is only about half a quart a month, so it is not terrible. The problem is that the oil splatters back with the wind, landing on my exhaust which leads to the smell of burning oil when the vehicle is stopped.

I know that the oil pressure sending unit is near the puddling but the area around that sensor seems to be devoid of oil. I know that the head gaskets on this model of engine has a tendency to go out as well but I am not getting any smoke out of the exhaust and I have has a few mechanics tell me that if the gasket had gone out, then the oil would be leaking from the bottom and not puddling on top of the cylinder head.

I put oil dye in a while back to try to find the spot of the leak but I haven't found it yet.

Anyone have any ideas of where I should check or what the likely problem is?

Thanks

Ian
In your picture 3/4, it looks like the oil is leaking from that black hose at the bottom of the picture.
 

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05' Forester XS
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6 Posts
Hey! Did you ever figure this out?

I’m having a very similar problem. Fluid pooling on the passenger side of engine block. Though I am extremely amateur at mechanics it feels and looks like oil to me but the PS pump is gummed up and certainly appears to be leaking which makes it seem like PS fluid is what's pooling. Also as in your case I'm loosing oil which is confusing things. Maybe separate problem?

Head gaskets and oil switch are less than a year old. What gives?

Engine Top Down
Auto part Fuel line Engine Pipe Vehicle

PS Pump
Auto part Engine Vehicle Fuel line Automotive engine part
 

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05' Forester XS
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6 Posts
Thanks. Cleaned today. Already notice some fluid around the pump. See photo Could it be a washer/ O-ring? Do you think this is an easy repair to make?

536823
 

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05' Forester XS
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6 Posts
Solved!

Just wanted to update for anyone else who experiences this leak:

Since I was not able to locate the exact source of the leak I decided to replace any o-rings or gaskets I could on both the high pressure and low pressure line. I also replaced the banjo bolt and crush washer on the high pressure line.

I had to use a breaker bar to remove the banjo bolt on the high pressure line. This was a 14mm bolt. The other line was removed easily.

With the lines disconnected I removed the old o-rings and gaskets and then cleaned the connection points with brake cleaner and lightly with very fine sandpaper since there was some built up oil residue.

I replaced all the o-rings and gaskets and also used a new banjo bolt and crush washer. When re-installing I tightened the banjo bolt to 29 ft/lbs.

I found this video to be helpful visual guide for disconnecting the hoses. There are helpful photos in this post as well.
 
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