Question about 1996 Lexus ES 300

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Engine oil leak

Have a small oil leak from the right side of the engine.

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  • Anonymous Jan 14, 2009

    mine was leaking too. it turned out that i needed to replace the gasket

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Check the valve covers

Posted on Dec 31, 2008

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2 Answers

Leaking oil on right side of motor.


The crankshaft oils seals are known to leak after approx 100,000 miles. The Harmonic Balancer (fan belt pulley) end of the engine will have lots of oil and road grit around the oil pan, air conditioning compressor, power steering pump and other area in the engine bay due to wind spread. This seal can be replace without removing the engine. Remove the harmonic balancer bolt and use a pulley puller. If the seal mating surface is grooved replace the balancer too or the new seal will fail soon.

The transmission "bell housing" will weep oil and or trans fluid if the rear crankshaft seal or the transmission seal develops a leak. This seal is much larger than the front seal so it lasts longer and need replacing less often. The transmission will need to be removed from the car to reach these seals.

The oil pan is sealed with silicone engine sealant and will dry out and leak also. Sometimes the leak looks like it is the front or rear seal (pulley or transmission end of engine) but it may be the oil pan leaking and dripping into the pressure plate inspection plate or the pulley. The oil pan can be removed and resealed without removing the engine or transmission but it is a little tricky. Dropping the engine's under brace and exhaust pipe is recommended. Additional engine/transmission support is needed to do that.

While you are under the car look near the oil filter. Above and forward (toward the fan belt is forward) and see if there is oil dripping from the oil pressure sending unit wire. It will leak into the electrical connector. Squeeze it and see if oil seeps out. If so replace the sending unit. It looks kind of like a spark plug screwed into the block.

Near the oil filter you will see the power steering pump mounted to the side of the pulley end of the engine and it is over the right CV drive axle and has several hoses connected. One larger hose is a none pressure hose that gravity feeds the pump from the fluid reservoir mounted above it on the passenger side wheel well in the engine bay. This hose eventually leaks and drips power steering fluid everywhere! It is a molded hose from the dealer parts dept. and relatively easy to replace. Messy but do-able.



Now the top side of the engine. The valve cover has a rubber gasket that shrinks over time in that hot engine bay. Take a Phillips head screw driver is see how loose the screws holding it are. Really loose hu? You can tighten them but you should replace it because it shrunk and that makes the screws loose.

You will need some silicone engine sealant each side of the distributor bridge at the driver's side of the cover. Get a manual to make sure you tighten those screws in the correct order.



Distributor "O"ring seal can leak. Two 12MM bolts to remove it and put a new "O"ring on and you are set. Mark the Distributor's position to the bridge bracket BEFORE you loosen those screws. Line it back up to the marks so you don't mess up the timing and reset the timing after is even better.

Jun 26, 2011 | 1996 Nissan Sentra

1 Answer

My car is leaking oil. i dont know if its the oil pan or the oil filter came loose? need to know where the oil filters located.


if it leaves small spots the chances are its the pan gasket but the oil filter should be located up in front of the engine on the right hand side... depending on the size of motor

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Engine smokes when hot


this is caused by a valve cover gasket leak, replace them

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My 2006 Town Car is leaking a small amount of oil. Garage has checked and replaced oil plug and tightened oil filter but I am still noticing small 1/2 dollar bill size leak on garage floor. Any ideas? Cost...


Check for stains in the valve cover gasket on the side of the oil filter, and in the engine block right above the filter. There is not much that can leak on that side, other than filter itself, and you already checked it. You HAVE to take the car to dealer for warranty inpection, and repair. The issue not only has to be covered by warranty, but by not doing so in time, it might void the warranty, for being careless about it.

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It sounds like you have a head gasket that went bad and needs to be replaced, have a compression test done on all the cylinders and if your luck it may just be a intake manifold gasket when bad and needs to be replaced. Note; that the antifreeze is corrosive to the engine bearings so try to do more frequent oil changes or have the issue replaced as soon as you can before you end up having to overhaul the whole engine. Good luck and keep me posted and note: Next time you have a small leak, use kitchen black pepper. The pepper will block any small holes in the system and can be cleaned right out with just a simple flush as to the brand radiator sealer will restrict the flow of antifreeze through out the engine's coolant jackets and journals.

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My car leaks oil right above the starter it a small plug thing that goes to the motor and has some wires hooked up to it that i can disconect do uyou know what the part is called it look almost like a...


Where you're describing sounds like it's leaking from the oil pan. If the vehicle has high mileage, you will probably want to look into replacing the oil pan gasket. If this doesn't sound right, it could be something to do with the oil pump. There isn't a lot of electrical components in that area of the engine. The oil pump or oil sensing unit would be my guess.

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Volkswagonw polo polo P reg 1.4cl unknown oil leak


Did you check the oil cooling filter...??? , that's the only thing I'd imagine , otherwise you may have a very small leak on the engine gaskets...

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Oil Leak (major) 1997 Camry 2.2 ltr.


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