Going to change out the PCV integrated valve cover this weekend. Also changing the hose. Anything else I should do besides those two things? I'm not seeing leaks anywhere else so I should be good there. Just making sure there is nothing else I should do while I do those two items.
5.3 is devouring oil
- Thread starter smcnair
- Start date
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avalonandl
Full Access Member
Make sure the PCV hose routing is correct.
Oil catch can. Welcome to the club. :/
Mudsport96
Full Access Member
I switched both my Tahoe and Silverado back to the old 99-02 pcv valve covers and opened the drain holes up in them. The Tahoe never did use oil so it was preventative, but the Silverado was using 2 quarts per oil change. It stopped after the cover swap and has been good for over 100k miles.
TollKeeper
Full Access Member
Any further info on this? My Envoy is going thru oil, about 4 quarts per oil change, and it doesnt leak.
Mudsport96
Full Access Member
What info do you need?
I just went to the junkyard and got a pcv valve cover off of a 99 5.3 and put it on my 06.
Also, 4 qts per 3000 miles is probably something bigger than the valve cover issue.
TollKeeper
Full Access Member
I agree.. But its really weird.. I will do an oil change, fill it up to the full line (6 quarts). Check it 1-2 days later maybe 20-70 miles, and it will be down nearly 2 quarts. And from there is just goes down a little bit, maybe 1.5-2 quarts over the next 4500 miles. It does this every oil change, without fail.
Been doing this for over 110k miles. Motor is still un-opened since new, OEM cats/Muffs, OEM coils.. Even the brake system is OEM except pads and rotors.. Its actually been really shocking since it has 203k miles on it now.
Yeah, that's weird.
