I have got Boxer 150 . I have bought it recently but it is leaking oil from down engine i am sure that all the seals are right what is the problem

It is a simple task..The best advice I can give you is ..DONT get a cheap kind...All auto parts stores should sale this...It works good if you get the best kind that is highly rated with good reviews...All you have to do is pour it in the engine oil fill ...I strongly recommend with safety glasses clean engine completely to remove all oil from leak area while cold....Let it dry then use the sealing substance...BE SURE and follow the directions on the bottle...Also you may want to change your oil and put a thicker oil in it to help stop flow of leak...If it has a lot of miles I recommend 20/50 synthetic...Or if you have recently changed you DONT want to overfill it..Most stop leak instructions will tell you to add to engine when it is 1qt. Low.....I have had luck with sealant in the past..It will either stop it or slow it down.."

If you are sure it has no leaks, the only other possibilities are worn oil rings or valve stem seals. Generally if the oil rings are worn then the compression rings are as well, so get a compression test. If readings are down on spec, which is about 150 psi., add a tablespoon of engine oil to each cylinder in turn through the plug hole. If readings rise, then it is worn rings at fault. If not, then suspect the valve stem seals.

On these engines though, there are several characteristic oil leaks which may be hard to spot, being the cam cover gasket, crank nose seal, and the distributor o-ring seal.

try making sure oil filter is tight if you filled it recently could have leaked down side.if you can crawl under and check a location of wet oil on bottom of engine. if near trans probably rear seal

SHOULD NOT HAVE OIL CONSUMPTION. IF YES YOUR ENGINE LEAKING OIL OR BURNING OIL IF YOU ADDING OIL TO ENGINE EVERY WEEK.IF LOSING OIL CHECK FOR LEAKA AT THE FRONT CRANKSHAFT TIMING COVER SEAL OR REAR MAIN OIL SEAL.CHECK FOR LEAKING OIL FILTER.ENGINE CAB BURN OIL THROUGH WORN VALVE GUIDES AND VALVE SEALS.WORN PISTON RINNGS.IF YOU HAVE HIGH MILEAGE ENGINE IT WILL START USING OIL.

Start at the top of the engine and work your way down, intake manifold end gaskets possibly, try some leak detector spray. Looks like a powder when it dries....spray it on the area of the engine you suspect the oil is leaking from, let it dry......go drive it for a bit and recheck.....use an inspection mirror, the oil trace will show up as a dark streak when it leaks. Try NAPA. Good luck.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_2496c4f07ad24453

remove the filter and be sure the is a rubber gasket attached, if so rub a bit of oil on it before replacing, being certain that interior threads are clean and not stripped ( if so replace filter) only turning hand tight, no not overly tighten.

oil filter screws onto an adapter housing which also has the pressure sending unit on it (above oil filter). This adapter housing bolts to the block with 3 bolts. if oil appears to be leaking from where the adapter housing meets the block (especially at the rear side of engine near bottom), then you need to replace the siamese o-rings between the adapter housing and the block ($12 part at dealer). remove lowest 12mm bolt and loosen top 2 12 mm bolts(top 2 bolts won't come out unless you drop the engine down, but loosening 1 inch is all you need), replace o-rings and retighten bolts. be careful not to get dirt/grit between block and adapter. just finished doing this to son's 95 2.7 v6 which was leaving an 8" puddle of oil after idling for only 1 minute-worked perfect

you will have to raise the engine,by undueing the engine mounts,then remove the oil pan,then remove the lower crank bolts,drop down the crank enough to gain room for the new rear main seal to be put into place and reverse procedure and torque the bearings to specfications.you will need a seal tool for the rear seal

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.

this being a side mounted 3.1 liter (v6) the front of the engine would be on the right side of the car from the driver's perspective. if the oil is coming from that side cocentrate your pinpointin there, make sure it is not one of the valve cover gaskets and oil is running down from the top (common) and making pinpoiinting the leak difficult because it tends to spreak on its way down. Seals tand to leak more when the engine is running, so you may have to run it while parked for a little while and check for the leak. It may be the crankshaft seal if it is localized to below the crankshaft; Or if it is coming out of the timing cover then it may be the camshaft seal of the lower intake seal. Intake seal leakes are next to valve cover gasket leak the most common on those engine. Update us. Good luck.