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Anonymous
Anonymous Posted on Jan 23, 2009
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WHAT'S LEAKING? Is it the valve stem seals or piston rings???

Hi,

I've got a 2004 Ford Crown Victoria Police Interceptor. When I pulled the #1 and #5 spark plugs, they were covered in oil. Is it the valve stem seals or piston rings??? Is there a fast way to find out? What should I do? Can I just replace the heads?

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Hi,
If it is the valve seals,you can replace the head,but it would be cheaper to replace the seals,If you pull the head,you can do a leak down test on the pistons to check the rings as well.


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You are better just reblding the motor

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Valve stem seals are a LOT cheaper than a head. Either way, you have to pull the head off. I would go with the seals first. If that doesn't take care of the problem, you have a major job coming to replace the rings.

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