Cleaning valve covers
Senior User
Joined: Aug 2003
Posts: 329
Likes: 1
From: Dallas, TX
It seems like a small amount of sludge might be normal with older motors unless you religiously run quality synthetic oils.
It's also important to keep the PCV (positive crankcase ventilation system) in top working order, as it can also be partly responsible for the sludge.
Good luck!
It's also important to keep the PCV (positive crankcase ventilation system) in top working order, as it can also be partly responsible for the sludge.
Good luck!
I had zero sludge in my 200k+ 4.9 when I pulled the cover recently. It's had penzoil conventional its whole life, with regular changes.
Carbon buildup baked onto things, yes, but no sludge anywhere to be seen.
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