Oil found on my driveway, looked at the engine block, some oil appears to be leaking from the front of the engine, dripping down. Maybe a few drops a day. What should I expect for repair costs? Is this a head gasket, or some other engine gasket deterioration? 2000 Sentra GXE, only about 68,000 miles, not that old. What causes this? Just age and wear and tear, or cooling system problem? Pistons firing out of sequence causing undue heat and pressure?
Anyone else with this problem? Bet to let a shop look at it and give me an estimate? I shudder at the repair costs right now.
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Re: Oil Leaking slightly from engine block
Could be some thing as simple as a leaking filter, drain plug, or oil pressure sending unit. If it hasn't been in for an oil change lately, take it in, mention you have seen drops on the driveway, the tech will likely note the leak and possible solution. From this you can determine the cause and cost.
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in my opinion the #1 most common place is from the oil filter housing. Stand at the front of the engine bay, look at the right side of the engine block under the intake manifold. If the block is oily, wet, then that's the culprit. There's a $5 oil seal that dries out and can end up causing oil drops on your driveway. The labor for this repair can be several hundred bucks. it takes about 3-4 hours. Other common areas are the valve cover gasket in cars over 100K miles. If you smell oil burning inside the car, when you start it up in the morning, it's likely leaking here and getting on the exhaust manifold where it burns off..
Next place to look is the high pressure hose form the vanos to the oil filter housing. It's a 8" hose with banjo fittings. Over the years they can start to leak a little. Lastly the oil pan gasket can start to leak on cars with high mileage. My 98 323is has had all four over the years. It has almost 200K on it. I've done the oil filter housing gasket and some day will do the rest
The oil filter gasket is the one that leaks the most. It's not hard to do yourself if you are mechanically. There might be youtube videos to help. Good luck.
Dear Sir, Here is the oil leaking Problem Identifying Technique
Engine oil leaks from the valve cover gasket are common.
The intake manifold plenum gasket may leak and cause increased oil consumption/burning and a spark knock during acceleration; the gasket should be replaced.
External oil leaks from valve cover gaskets, intake gaskets (front or rear), and the rear crankshaft (rear main) seal area are common. The rear main seal is an unlikely source. Normally, the bearing cap mating surfaces (as well as the sealing surface between the oil pan and bearing cap) are the source for the leaks.
If the oil filter casing shows signs of distortion from excessive oil pressure, theoil pump should be replaced.
Often misdiagnosed as a leaking oil filter gasket, the oil filter adapter can seep from between the adapter and engine block.
Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.
First you need to identify what's leaking? What color is fluid? Green, Red, Brown? and where under car is fluid leaking from center, front rt, etc... Another option is check ALL fluid levels - coolant, oil, power steering, transmission.
This is not an easy repair in your driveway, but can be done. 1st thing, have you checked to see if the oil filter is the issue or is it the drain plug? If its the oil filter housing gasket, you will need to remove the filter. The housing is held in place by the threaded bolt assy that the filter screws onto. You will need to remove that bolt, remove the coolant hoses. Clean the engine block surfaces, for the new gasket to mate to, clean the cooling housing surfaces, install the bolt through the housing, and install the gasket onto it. Then install the bolt/housing into the block and tighten the bolt. Install the coolant hoses, oil filter. Fill the cooling system with the coolant that you removed. Fill the engine with oil, start and check for leaks.
If it's leaking at the top of the engine down. Look at the top of the engine at the front and you'll see a bleeder valve on top a black housing. These housings like to come apart at the glued seams. If it's leaking at the lower part of the engine towards the front, it could be your water pump leaking. Check your oil and if you see the color of the oil looking like chocolate milk, your water pump needs replaced, the oil will need changing as well. Do a coolant system pressure test and see if your hoses somewhere are leaking. Also check for your surge tank leaking. This is the tank that you put coolant into.