I plan to change the PCV and screen on my '91 Grand Marquis (302). Should I
replace the grommet too or are they usually ok?
I finally located the pcv on the back of the engine (great idea Ford) and it
looks like it will be a bit of a chore to deal with. Anyone have any
pointers on this repair? Especially on the screen, does it just lift out or
what? I assume the valve just pulls straight up and out.
I saw a Fram PCV at Wal-Mart the other day and I noticed it looks different
than the one on my car. I think I will go to O'Reilly Auto and see if they
sell the Motorcraft valve they have listed on their website. It's somewhat
cheaper than what Ford quoted me for a new valve.
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The PCV is actually pretty easy, and yes you should replace the screen, it
is a major cause of oil leaks. If it's never been changed, soak it with some
carb cleaner, then force a flat head screwdriver into it and twist it to
break it free.
The screen is difficult to take out, on my 89CV, I screwed a 3 wood screw down
through the mesh and pulled it out with a vice-grips. It was completely
after replacing the PVC and screen, all my oil leaks stopped.
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