Pistons
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This is a discussion on Pistons within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; So I have 2003 wrx and the exhaust is getting oil in it. So maybe my turbo is messed up ...

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    Registered User interhead77's Avatar
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    Pistons

    So I have 2003 wrx and the exhaust is getting oil in it. So maybe my turbo is messed up or could it be pistons? The head gaskets are pretty new only 3 months old and the turbo is a deadbolt monster td04

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    OMG WTF MainFrame's Avatar
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    Could be a number of things.. remove the headers. If there's oil coming from the heads, it's coming from the engine. Too bad Deadbolt is out of business, free rebuilds was the ****.

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    Registered User interhead77's Avatar
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    So just check the manifolds or do I have to pull the damn engine apart again?

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    Pistons

    A compression test is a pretty simple way to determine if your pistons or piston rings are donezo. Consult your shop manual for specifics, but normal compression should be anywhere between 140-160 psi. If you have low compression in any cylinder, squirt some oil into the cylinder (~2 teaspoons) and recheck compression. If the compression increases considerably after the second run, your piston isn't making a proper seal (piston rings) and is likely responsible for the oil burning. If you have normal compression and you are not leaking oil from the valve cover, I would suspect the turbo.


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    OMG WTF MainFrame's Avatar
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    I would check the manifold first.. if there's not oil coming out of the heads then the oil isn't coming from the engine.

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    Quote Originally Posted by zax View Post
    A compression test is a pretty simple way to determine if your pistons or piston rings are donezo. Consult your shop manual for specifics, but normal compression should be anywhere between 140-160 psi. If you have low compression in any cylinder, squirt some oil into the cylinder (~2 teaspoons) and recheck compression. If the compression increases considerably after the second run, your piston isn't making a proper seal (piston rings) and is likely responsible for the oil burning. If you have normal compression and you are not leaking oil from the valve cover, I would suspect the turbo.


    I have perfect compression/leakdown, and my engine is chewing through oil.

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    Pistons

    Quote Originally Posted by MainFrame View Post
    I have perfect compression/leakdown, and my engine is chewing through oil.
    Do you have forged pistons?


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    Registered User interhead77's Avatar
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    I should also mention that my car doesn't seem to put out more than 7psi (read from a boost gauge plugged in near the throttle body) and it makes a ticking noise when it's on not to mention the car is incredibly loud. I'm at 140k but I bought the car at 135k. I've changed the oil and I am going to change it again soon.

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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by zax View Post
    Do you have forged pistons?


    Well duh



    Rings were not installed correctly..

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    Registered User interhead77's Avatar
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    Think my rings went bad?

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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by interhead77 View Post
    Think my rings went bad?


    One of many possibilities.. my exhaust has no oil in it, no leaks, no smoke, consumes nearly a quart every 200 miles.

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    Pistons

    Quote Originally Posted by MainFrame View Post
    Well duh



    Rings were not installed correctly..
    That doesn't count! Haha
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    Registered User interhead77's Avatar
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    Guess I have to find out the hard way. I'm just surprised because it doesn't seem like the car is losing any.

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    Quote Originally Posted by interhead77 View Post
    Guess I have to find out the hard way. I'm just surprised because it doesn't seem like the car is losing any.


    If it doesn't seem to be losing oil, why worry about it? Are you sure it's oil that's in the exhaust? If it's black and dry, like graphite powder, that's carbon, not oil.

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    Registered User interhead77's Avatar
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    It's wet sometimes and it's dry other times but the ticking and loss of pressure is what concerns me. I know there's definitely something wrong there.

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