It's a 2000 limited with around 120k on the clock.
I bought this car stock with about 118k on it late last year and it was fine didn't burn oil or anything. Good running car, pretty mint. I lifted the truck right away before I even did my first oil change. I did oil change and it was fine for a while and out of nowhere started eating up massive amounts of oil, no leaks, smokes a bit but not as much as it should for the amount of oil it's going thru. I've added 4 courts this last 2500miles and as of this morning I think I'm a court or so low. The truck did develope a nasty tick at cold start up, sounds like the top half of the motor is being starved of oil until it warms up. One of my guesses if valve seals but that bad? I'm gonna do compression test this weekend. Any ideas guys?
Measuring thru the dipstick, right? Certain the dipstick is seated correctly?
Smokes on start up or all the time?
Hows the antifreeze?
Do you have any mods we should know about? (remote oil cooler, oil filter mods, etc?)
Compression test is a good start... let us kow the results and answers to the above.
2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof. Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Check the crankcase breather and intake for signs of oil. Could be blowing oil out through the breather and then burning it. Bad PCV valve and/or charcoal canister? The old 4.2L sixes did that a lot. I wonder if a 4.7 might do the same.
Yea I have to invest a day in going over everything I've just been real busy at work so haven't had much free time and just throwing oil into it to keep it alive.
Why would I be getting such a bad tick at start up? Oil pressure reads around 60 at start up and stays pretty close when warmed up. I have however gotten a check guage light twice and oil pressure read 0 since owning it but lasted a few seconds and came back on. Bad sensor? Oil pump?
Ok I was able to do a compression test just now, I haven't drained oil or coolant yet but dd notice a lot of oil by the IAC housing and throttle body. I don't know the order of cylinders but I will put it down as if you were looking at the engine bay from the front.
155 145 <-- rear of motor
160 150 <-- front of motor
Haha very true sorry.. I really do know how to spell it, don't know why i spelled it like that. Good catch, I'm done for the night but will check coolant tomorrow, I am going to drain anyways since I will be doin the heater core of the jeep
The 4.7s are very picky about oil. Ask me how I know. The hydraulic lifter valves did the same on mine and ticked then went away. It turned out though that the oil pump was going out and there was alot of crap in the passageways. Your compression seems pretty high there. Maybe you just lost some valve seals.