I need some help. I have an 02 ford f150 with a 4.2l v6. It's burning about 1.5-2 quarts of oil a week! There's no smoke coming out of the exhaust and that's confusing me. It's a standard and its starting to putter real bad at start up and starting to accelerate in first gear. The truck has 297*** miles. I'm thinking the rings are shot but the only thing that's confusing me is the lack of smoke coming outta the exhaust. Help! This is my personal work truck. If it can't work neither can I!!
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Anyone have any mechanic experience?
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No leaks? By 300k I would expect a couple, and you may not always see a lot of oil drops, and still have a leak or two that gets blown off while driving. Also by that point I would expect the valve guides and rings to be suffering. It is possible that it can be burning oil without it smoking like a diesel. I doubt that it's going in the coolant, especially if it's low, and especially after losing that much oil per week. If the coolant is low, you should find out why because it could be a head gasket issue allowing both oil and water into the cylinder. I've never known the pcv to cause oil consumption in the 4.2. If it gets clogged it will cause pressure buildup and eventually cause leaks.
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Originally posted by kparker158 View PostCould be the main seal in btwn the engine and tranny. Mines out on my sierra.
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Originally posted by AJMag View PostNo leaks? By 300k I would expect a couple, and you may not always see a lot of oil drops, and still have a leak or two that gets blown off while driving. Also by that point I would expect the valve guides and rings to be suffering. It is possible that it can be burning oil without it smoking like a diesel. I doubt that it's going in the coolant, especially if it's low, and especially after losing that much oil per week. If the coolant is low, you should find out why because it could be a head gasket issue allowing both oil and water into the cylinder. I've never known the pcv to cause oil consumption in the 4.2. If it gets clogged it will cause pressure buildup and eventually cause leaks.
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