Oil is leaking, check engine light is on, knocking in engine when idle increases with acceleration
An engine used oil for lubrication and colling. If there is no oil then there is no lubrication. No lubrication means lots of heat and friction. Is it a ticking or banging noise? I do believe it is an ohc engine so it couldnt be a lifter ticking. It is probably a rod knocking. It so then it will more than likely need an engine
SOURCE: oil consumption, rattle, engine noise
Check under the hood and inspect the valve cover gasket. If it's bad it would explain why you don't see any leaks on the ground because it's probably burning off on the manifold. This ticking you're hearing is a lack of lubrication to the rocker arms. Apart from the valve cover gasket, you should get under the car and inspect the oil pan and oil filter for seepage. Best of luck on your problem.
Greg
SOURCE: 2000 Engine oil leak
most likely front cover o-ring. there is a small $4 dollar o ring behind the front engine cover, that leaks. Pretty common problem on your car.
SOURCE: nissan xterra knock sensor
It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.
SOURCE: nissan maxima, high oil consumption on 2002
If you love the car as you say than be prepaired to shell out the bucks for a rebuild or replacement engine, because thats the only fix for your situation. You may not see any blue smoke but believe me its burning it, or you got a leak witch you say you don't. Its going someware and most likely its out the exhaust.
SOURCE: Nissan Altima 2000 - Engine oil leaking problem.
replace the front oil seal. first i would clean the engine with purple power (degrease etc.) then look at the engine and make sure the leak is not coming from above like possibly the valve cover gasket or from the oil sending unit. try to tighten the bolts on the valve cover and even the oil pan. you never know, you may get lucky. i don't know where you are but front seals are cheap but the labor on the job is what costs you.
Dear Sir,
Here is the oil leaking Problem Identifying Technique
Engine oil leaks from the valve cover gasket are common.
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