Question about 1999 Mercedes-Benz M-Class

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I have an oil leak coming from above the alternator. I have cleaned the engine and I cannot find a leak from above.

The leak have been there for several years, But now it is getting worse and I want to sell it. It has 150k. I used as sealant but that did not help.

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  • Mercedes-Benz Master
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Thats low miles-with care u can do twice that--a pro shop will do a leak test--cud be just valve cover gaskets--use of 40wt oil or a thickener sloes it down--------thats a classic car--new stuf has too much computercrap

Posted on Apr 30, 2013

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I see oil leaked everywhere including all over the alternator..were do you think its coming from?


4down vote First job is to refill the engine with oil. Check for the correct oil in your vehicles hand book or ask at your local parts counter. Check with the vehicles owner for a history of any oil leaks. Do not start or drive the vehicle without oil. Check for the oil filler cap having been replaced correctly. Check that the PCV hoses are in place and in good condition. The PCV system vents the engine and if it is not in good working order the engine crankcase will become pressurised and force oil out of seals and joints. If the oil comes into contact with rotating parts it will be flung around the engine compartment leaving the mess you describe. With oil replaced in the engine, being mindful of rotating parts, run the engine and look for a leak. Steam cleaning is the ideal way to clean up the mess, but you can use an aerosol can of brake cleaner on a cold turned off engine, together with rags or paper towels. Hot parts could ignite the brake cleaner, but it does evaporate very quickly.
7down vote If oil drips on a pulley or a belt then the rotation of those objects could sling the oil everywhere, even as high as the bottom of the hood. Most likely an oil leak would have to be above these components and a good guess would be through something like a failed valve cover gasket.
Another possibility is that it is leaking near the front of the car from (oil cooler line, for example) and the wind from driving and the radiator fan could be blowing the oil to a variety of places, but I feel this is less likely to make it to the hood in any significant quantity.
If the oil is leaking this badly then you might be able to start the car (make sure you fill it back up with oil before you start it again) and see if you can watch and see the oil dripping.
Just to be clear, don't drive it when the oil is empty otherwise you will create bigger problems then an oil leak. If you absolutely have to drive it before fixing it, then fill it will oil and check the level frequently to make sure it doesn't get to empty before your final destination.

I would also suggest that you clean the excess oil off before re-filling. Once you've refilled the engine with oil let the car sit for a couple hours and do a visual inspection to see if oil is leaking again and if so, from where. That will help immensely with troubleshooting.
https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=oil%20leaked%20everywhere%20including%20all%20over%20the%20alternator.

Dec 15, 2016 | Cars & Trucks

1 Answer

I have found oil in my spark plug well (cups). cy 1


The oil will be originating higher up on the motor. Most likely you have an oil leak in the Cam cover gasket and some of the oil is running down and pooling in the spark plug cavity. Cam cover gaskets often need to be replaced periodically in any event and you do have a 14 yo car. It is difficult to be certain without inspecting your engine but that is where I would look first. Just carefully soak up the oil in the cavity with some paper towel and cloths. (If the cam cover gasket has been replaced previously you may get a leak eventually because they are often not tightened evenly at the correct torque setting or are over tightened and the cover can distort and the gasket can be over compressed).

Once you have cleaned up the oil around the S/plug , if you then clean the engine around that area and above it thoroughly you may be able to spot the source of the oil leak once the new oil starts running out. Just tip a small amount of kerosene or degreaser on your cleaning cloths and work around the engine with the dampened cloths to remove oil and grime. Then inspect the engine after a few hours of running and see if you can see where the oil is coming from.

Dec 29, 2015 | 2001 Hyundai Accent

1 Answer

Oil leaking above filter could it be oil sending unit


Could be the oil pressure switch. But ive also seen the oil filter housing leaking on thesed 2.2L accord engines. If its coming from even higher then all of that then its the valve cover gasket leaking. i Suggest cleaning off the engine first with brake cleaner to really see exactly where it is coming from

Jan 07, 2013 | 1997 Honda Accord

1 Answer

Oil leak from bottom rear of engine does'nt appear to be pan or rear main maybe higher on engine,maybe oil sending uniy?


clean up the engine with a good engine cleaner follow the instruction of the can use a hight preesure wather machine ,(cover with plastic bags the electrics parts alternator,ignition components ,etc....)after you clean up the engine run afew miles and you will be found the exact place of the oil leak.

Jul 22, 2012 | 1999 Chevrolet S-10 Pickup

1 Answer

My 2000 Jetta 2.0 is visibly leaking oil from above the oil cooler when the engine is running. Is it most likely the seal or could there be something else above the cooler that could be leaking?


let car cool down clean oil cooler make sure no oil visible. start engine keep looking see were oil is leaking from use torch or lamp if nessesary

Aug 02, 2011 | 1998 Volkswagen Jetta

2 Answers

Have oil leak not heavy, but it leaks any answer were it could be coming from..


Valve Covers, Head Gaskets, Oil Pan Seal and a number of other spots. You'll need to clean the motor with Gunk Engine cleaner and then look for the largest build ups of oil and crud to get a better idea where it is.

Feb 15, 2011 | 1997 Mercury Villager

1 Answer

Engine oil leaks rover 25 1398cc engine petrol above and around oil filter. about egg cup full intermitently every few days


possible cause of leaks the oil filter the oil pressure switch oil could be running down from cam cover leaking gasket; could be camshaft oil seal best to clean oil run car try to pinpoint where it is coming from .

Jan 17, 2010 | 1995 Land Rover Discovery

1 Answer

My 1992 isuzu trooper is leaking oil .it appears to be coming from top passenger corner of oil pan.however oil has coated parts to rear and above oil pan.oil leak is slow.could this be oil pump.what are...


clean your engine and look very carefully where the oil leak really come from, the cause why this leak happen, the engine was shutdown while the engine temperature is hot. usually the leak will come from the turbo. the engine must be idle for 3-5min before shutting off.

Jun 30, 2009 | 1992 Isuzu Trooper

2 Answers

97 jetta with oil pouring out just above where the filter ataches


I have a 1997 jetta and have been through this. Go to the volkswagen dealer and have them pull up the oil cooler housing. You will see a gasket (o-ring) that seals the two pieces of this housing together. Buy that. Your old one has gotten brittle from years of extreme temperature swings and cracked ( it will be like hard plastic when you remove it.) Unscrew your filter, take a 27mm socket (prob need deep well) and unscrew the nut at the top of stud where the filter screws to. Take it all the way off and remove the old o-ring. Clean the area well and put your new oil swabbed o-ring in and reverse the above steps. 30 min 8 dollar fix. Good luck!

Dec 27, 2008 | 1996 Nissan Sentra

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