Look hard around your valve cover or your spark plugs holes especially #3 and #5. i found mine on 3 and 5 spark plugs. oil sometimes drip down to hot eng and smell like burn oil. possibility your valve cover that seal your spark plug hole is worn out and leak around the valve cover and straight down to hot area. replacing valve cover gasket is not easy and if you take it shop will cost you over $1000.00 because of intake manifold and a lots of hardwares to remove. shop around before you take it to the shop. if you do it your self with a friend make sure you take picture for every lines ,bolts sensor plugs and so on you remove. also may as well tune up or change your spark plugs. good luck
Here is what is happening to all those monteros with the burning oil smell. I found the passenger side exhaust manifold had a crack in it by the rear most cylinder and the exhaust valve guide seals were bad at the same time. Oil is forced out the exhaust port and is seeping out the cracked manifold and causing the burning smell. I welded the cracked area of the manifold and replaced all the exhaust valve guide seals on passenger side cylinder head with it still mounted on the engine. The problem and burning smell are gone.... hope this helps all you montero owners :)
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