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Old 08-13-2012, 05:48 AM   #1
Charlton
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Default Oil In Spark Plug Holes

Changed my spark plugs on my high mileage Forester and noticed oil coming out all 4 spark plug holes. It was even worse on driver side. Is this normal? Did I put in too much oil when I changed it last?
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Old 08-13-2012, 06:18 AM   #2
OldStyle
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You didn't tell us the mileage but sounds like age has gotten to your oil control rings.

When did you change your PVC valve last?

How much oil are you consuming between oil changes?

I'm sure the experts, not one myself, will want to know.
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Old 08-13-2012, 06:25 AM   #3
Charlton
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152,000 miles and I'm not the original owner. I have not changed the PCV valve yet.
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Old 08-13-2012, 07:21 AM   #4
silver2004impreza
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It sounds to me like the spark plug tube seals are worn out. Get yourself a set of valve cover gaskets and replace them. It's a fairly common failure. I see it all the time at work. Just as a heads-up, be gentle when you're re-tightening the bolts that hold the valve cover to the head, as it's possible to break the bolts off in the head, and they are a royal pain to remove if that happens. You're going to need a 10mm socket and a ratchet to turn it with. It's 5 bolts per side. There should be a write-up elsewhere on the site with pictures on how to replace a valve cover gasket if you don't know how.

Also, I'd recommend using Fel-Pro gaskets. They make the best ones I've ever used.
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Old 08-13-2012, 09:00 AM   #5
Charlton
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Would valve cover gaskets be a repair that can wait?
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Old 08-13-2012, 10:07 AM   #6
J.Gibbs
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Quote:
Originally Posted by Charlton
Would valve cover gaskets be a repair that can wait?
Can they wait? Yes. Should they? No

Sounds like you need to just take a weekend and rebuild your foz. All the parts can be had for like 500 bucks
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Old 08-13-2012, 10:39 AM   #7
suex
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The valve cover/spark plug gaskets are about 15$ per side from the dealer.... Very common fault with these engines... If your going to tear it apart you might as well do the head gaskets as well(get STI head gaskets not N/A ones they will just fail again)....
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Old 08-13-2012, 11:38 AM   #8
aclver1
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Valve cover spark plug seals are a very easy fix and since you take the valve covers off you might as well do valve cover gaskets also they are cheap. Pick up a little Subaru silicone sealant and put a little on the plug seals to make sure they don't leak. You might want to take the battery out and your air intake piping to make a little room but nothing major. None of this requires taking off the head or anything close to that so you will not need to worry about a head gasket unless you notice coolant in your oil or you have overheating issues. Head gaskets are major work and expensive, I wouldn't do it just for fun.
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Old 08-13-2012, 11:52 AM   #9
J.Gibbs
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Quote:
Originally Posted by aclver1
Valve cover spark plug seals are a very easy fix and since you take the valve covers off you might as well do valve cover gaskets also they are cheap. Pick up a little Subaru silicone sealant and put a little on the plug seals to make sure they don't leak. You might want to take the battery out and your air intake piping to make a little room but nothing major. None of this requires taking off the head or anything close to that so you will not need to worry about a head gasket unless you notice coolant in your oil or you have overheating issues. Head gaskets are major work and expensive, I wouldn't do it just for fun.
The spark plug seals are included with the valve cover gaskets.

Also he does have headgasket issues as stated in his other posts. His forester is sohc and actually really easy to do the headgaskets on and not expensive at all.

OP, best bet would be to order the full gasket kit for your car and just rebuild the engine before you have any more complications. If you were in my area id even do it for you
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Old 08-13-2012, 12:03 PM   #10
aclver1
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That's good to know, I didn't see his other threads, and I thought you guys were crazy for recommending a head gasket, 3 or 4 hours of work for something that could be fixed in 15 mins just because he had oil on his plugs. Yes if you have a head gasket issues do it all at once.
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Old 08-13-2012, 12:09 PM   #11
J.Gibbs
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Quote:
Originally Posted by aclver1
That's good to know, I didn't see his other threads, and I thought you guys were crazy for recommending a head gasket, 3 or 4 hours of work for something that could be fixed in 15 mins just because he had oil on his plugs. Yes if you have a head gasket issues do it all at once.
Definitely a day project for the sohc. the dohc like I have, more like a weekend lol.
But when you can get all the parts and tools needed to do this job for under $700 its well worth it. There are even how to's and service manuals you can use to have step by step instructions
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Old 08-13-2012, 01:23 PM   #12
Charlton
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Given that it is an external head gasket leak I am going to watch oil and coolant levels. I'm going to have to wait to do head gaskets
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Old 08-13-2012, 05:04 PM   #13
J.Gibbs
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Quote:
Originally Posted by Charlton
Given that it is an external head gasket leak I am going to watch oil and coolant levels. I'm going to have to wait to do head gaskets
External leak is the sign you need to do them now! The oil and coolant usually don't mix in these engines when they go. Just trying to save you some big headaches
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Old 08-14-2012, 10:40 PM   #14
07RezaWagon
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Had the same problem on my 07 2.5i and replaced the valve cover gaskets with a kit from oreilly for like $25 which included everything needed. the hardest part was getting the valve cover off the motor due to the lack of space but it still only took a half hour
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