E46 engine internal wear. Burns oil like crazy. |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Posted: 26-March-2008 at 20:34 |
Hi peeps. My BMW has been burning oil rather excesively for a while. Its got full BM service history and has covered 111k miles. Iv just had it in to the garage and spent £600 on it including service, breather valve and pipes, coil packs, a bit of soldering, heater resistor and probably some other bits I cant remember. Anyhow since having the breather valve changed The car now smokes like hell, its embarassing! 530 miles after the work I have had to put nearly 3 litres of oil in again!!! Iv had it back to the garage and they have told me its internal wear and baisically a new engine is the cure. Obviously im a bit p#$t that iv just spent £600 on an engine that I now need to change. So Im looking for an engine(2.2 6 cyl) at a reasonable price. P.S I was told around £900 to fit an engine and roughly £900-£1000 for the engine and then our friend V.A.T. on top. Does this sound reasonable?? Thanks in advance |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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The engine runs lovely other than the oil issue which is another annoying thing. in a way I wish it was running like a dog.
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kbannon
Admin Group E39 525i Sport Individual Joined: 09-October-2002 Location: 64 Zoo Lane Status: Offline Points: 15508 |
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Who diagnosed the internal wear? BMW or a specialist?
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Current: 2009 E60 520d "Sport" tractor
Previous: 1989 E30 320i SE 1997 E39 523i 2003 E39 525i Sport Individual |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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A specialist Quarry motors at sheffield |
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kbannon
Admin Group E39 525i Sport Individual Joined: 09-October-2002 Location: 64 Zoo Lane Status: Offline Points: 15508 |
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Ok -the reason I asked was that sometimes BMW mechanics will favour a replacement over a repair.
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Current: 2009 E60 520d "Sport" tractor
Previous: 1989 E30 320i SE 1997 E39 523i 2003 E39 525i Sport Individual |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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do you think that may be the case? i asked about a repair but he said it could very well end up costing the same as a new engine in the long run.
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< FORZA WEST
Advanced Newbie Joined: 28-January-2008 Location: Forest of Dean,Gloucestershire Status: Offline Points: 29 |
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I have to say that engine wear in the 6 is very rare...we get them in with 250000 miles and no sign of any problems. Little concerned as it was burning a little oil then it has a new breather and suddenly its thomas the tank. How did they come to the conclusion its the engine wear..what tests and the cause.If you are burning that much oil from piston ring wear then you would be down on power and probably rough running. Have they checked the fault memory by any chance? when they say they replaced the breather valve,do you mean the cyclone under the inlet manifold.....I have come across one of the breather pipes to the cylclone collapsing,this causes a large increase in crankcase pressure and sending the oil into the manifold. |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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They called the breather a "scavinger valve" which was blocked and not alowing the burned oil to escape, not the valve is clear it is allowing the burned oil to escape freely. Im not sure what tests they did, I droped it off and they had it half a day. It had been on the computer they said because when i took it in for the work doing it was running rough which turned out to be 2 coil packs. There is no loss in power and the engine is quiet and smooth when revving all the way through the range. I would expect the engine to be noisy too! |
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Sporty1
Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297 |
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Get a compression test done, that will tell you if the engines worn, if it buring the amount of oil you say it is I doubt very much it would be running well, i.e. "no loss in power and the engine is quiet and smooth when revving all the way through the range" They probably didn't do a compression test or they would have figures to back up there diagnosis of it being 'donald ducked'. Was it smoking like a trooper before they 'serviced' it? Edited by Sporty1 |
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Sport Evolution Schwarz #043 |
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kbannon
Admin Group E39 525i Sport Individual Joined: 09-October-2002 Location: 64 Zoo Lane Status: Offline Points: 15508 |
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Just further to Sporty's suggestion regarding the compression test - get it done somewhere other than Quarry motors.
You can even get a compression tester tool in Halfords for under £20! How to do a compression test #1 How to do a compression test #2 Once you get the readings for the 6 cylinders, post them up here! |
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Current: 2009 E60 520d "Sport" tractor
Previous: 1989 E30 320i SE 1997 E39 523i 2003 E39 525i Sport Individual |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Thanks for the help guys! Yes it was smoking quite a bit and burning more oil than it should be but its smoking like mad now. Especially on start up and if i press the "loud" pedal. I think I'll be visiting halfords in the next couple of days. I'll report back the outcome Thanks again. |
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Stone-IslandV8
Really Senior Member II Joined: 31-January-2003 Location: North Somerset Status: Offline Points: 3015 |
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I had similar thing on my 520 which turned out to be nikasil wear.....believe it or not compression test didnt show up anything and a specialist reckoned the only definitive way to check for wear was a leakdown test.
The cyclone valve was changed as that screws up the engines vacuum system which sucks all your engine up. Try running the engine and taking the oil filler cap off.....too much vacuum on the engine will cause the cap to be a pain to turn and lift IIRC. In the end I had quarry motors fit a new engine which solved the problem but wasnt happy with their attention to detail when fitting it...do a search on my old threads. |
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Gentlemen I may not have a brain but I do have an idea
Past; E39 540T/E46 328CI/ E39 535/ E39 520/ E36 M3/ E36 318iS jet black Mtech/ E46 320d/ E36 318iS diamond black/ E36 318iS blue Mtech kit |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Right iv got a test kit so I'll post the results up once Iv had chance to use it
Thanks guys. |
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Sporty1
Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297 |
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Test with engine stone cold... sitting over night and then warm.
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Sport Evolution Schwarz #043 |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Ok will do. |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Hi, Im just in the process of doing the compression test and I have come across some plastic covers over the plugs which are bolted down with 2 bolts. Is there a rubber seal underneath these that I mite damage ?? Just wanted to be sure before I continue. Thanks. |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Also can anyone tell me where the MPI fuse is so I dont make a mess of the engine. Sorry Im not a mechanic so a little bit dumb
Thanks again
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Sporty1
Really Senior Member II Joined: 18-October-2006 Location: Hertfordshire, United Kingdom Status: Offline Points: 2297 |
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This should help you.... |
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Sport Evolution Schwarz #043 |
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Uncle kev
Advanced Newbie Joined: 26-March-2008 Location: Rotherham Status: Offline Points: 31 |
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Thanks Iv done the compression test and the results are (1 to 6 being from the bumper towards the windscreen) 1 - 200psi 2 - 210psi 3 - 210psi 4 - 210psi 5 - 200psi I couldnt do the 6th as the extention i was using was too long but the 5th was 200psi so the 6th should have been fine right ?! the plugs were fine and it actually fired up on 1 cylinder with the copression tester in it ( I left the other plugs in situe until it was their turn) There is soot in the exhaust no oil residue so its definately burning oil not blowing it out of the back. Soooooo...... Where next? I was going to try putting some Wyns oil addative in to see how that fairs up and maybe putting some 5/30 oil in rather than the mobil1 0/40. What do you think? Regards.
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< FORZA WEST
Advanced Newbie Joined: 28-January-2008 Location: Forest of Dean,Gloucestershire Status: Offline Points: 29 |
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Those compressions are fine....Any sign of oil in the coolant? I would be looking to take the manifols off and checking for crankcase breather failure-pipe collapsed/poorly routed.You may find a large amount of oil sat at the bottom of the manifold... After this you need to carry out a cylinder leakage test-thisa test puts a compression into the cylinder and the overal leakage of air should be no greater than 5 % - 10 % havent had to do this since the early nikosil problem...oh and the new e65 v12 n73 engine We dont see any other problems with these as such..head gaskets,heads,engines very very rare indeed. |
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