Losing oil.
#11
10-07-2018, 09:28 PM
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How many miles are on your engine?
I have my engine apart right now and while cleaning the heads, noticed there is an unusual amount of caked black oily residue in all of the intake ports and on the intake valves. Tonight I will be examining the intake manifold carefully to see if I can figure out where this is coming from. It appears to definitely be oil residue. I haven't owned the truck long enough to know what the oil consumption is (bought it at 89k and the lifter / cam went bad at 92k).
Anyone else notice this or have an explanation on how oil is finding it's way to the intake?
Mike Sal
I have my engine apart right now and while cleaning the heads, noticed there is an unusual amount of caked black oily residue in all of the intake ports and on the intake valves. Tonight I will be examining the intake manifold carefully to see if I can figure out where this is coming from. It appears to definitely be oil residue. I haven't owned the truck long enough to know what the oil consumption is (bought it at 89k and the lifter / cam went bad at 92k).
Anyone else notice this or have an explanation on how oil is finding it's way to the intake?
Mike Sal
#12
10-07-2018, 09:29 PM
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As far as the OP, if the PCV is stuck semi open that may explain some oil loss. I have owned may vehicles throughout my life and never had or needed a catch can. There are some PCV designs that are worst than others so I guess a catch can may help some, I don't know. If at 92k miles you had some caked on oil residue, then maybe the previous owner was not using full synthetic oil and doing regular oil changes. I wouldn't worry about it.
#13
10-08-2018, 10:26 AM
#14
12-24-2018, 02:24 PM
My 2011 1500 5.7L is losing oil and I don't know where. I'm putting in at least 4qts of conventional 5w20 every 2 or 3 hundred miles. When it first started losing oil it got so low it threw a camshaft position sensor fault that cleared when I added oil back. It will continuously lose oil until its empty if I don't keep it topped off. I've also replaced all of the MDS solenoids trying to get rid of that tick when it goes into eco, which hasn't helped. I haven't ever found where its leaking oil so does anyone have any ideas?
#15
12-25-2018, 08:47 AM
The 5.7 doesn't have a plenum gasket like the old 5.2 / 5.9 engines. I think wvmech's problems are bad rings. It probably got low on oil & overheated the rings which caused them to wear out. To use that much oil, it has to be going out the tail pipe. I can't believe he could be losing that much oil thru the PVC system or valve stem seals. He didn't mention any oil on the driveway, so assume there no leak (you did check to make sure it's not leaking around the oil filter?). A compression test should be able to confirm or deny bad rings.
Mike Sal
Mike Sal
#16
12-31-2018, 09:36 AM
The 5.7 doesn't have a plenum gasket like the old 5.2 / 5.9 engines. I think wvmech's problems are bad rings. It probably got low on oil & overheated the rings which caused them to wear out. To use that much oil, it has to be going out the tail pipe. I can't believe he could be losing that much oil thru the PVC system or valve stem seals. He didn't mention any oil on the driveway, so assume there no leak (you did check to make sure it's not leaking around the oil filter?). A compression test should be able to confirm or deny bad rings.
Mike Sal
Mike Sal
