wodge
Part of things
Posts: 455 
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My BMW modern has gone pop all of its oil has disappeared without trace and it’s feeling sorry for itself. After adding service station oil at huge cost it does still run but at least one of its 4 cylinders down.
It’s an N47 diesel engine with 140k miles so not an unheard of failure - probably timing chain jumped - and as such there are many many companies offering supply and fit recon engines for quite reasonable prices.
Anyone here got any recommendations or avoid warnings before I randomly pick one? Whilst it might be an interesting project to pick over myself I’d rather spend my time on my triumph and motorcycle toys and I need this done now not in 10-15 years lol
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Where are you?
Would you take it out yourself or are you looking for someone to do the whole job?
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wodge
Part of things
Posts: 455
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I'm essex based. Ideally I need someone to do the whole job as I don't have anywhere off the road to work on unless I move some of my other mothballed projects.
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v8ian
Posted a lot
Posts: 3,758
Member is Online
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Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style.
Austin A35van, very different------- but still doing it in style, going to be a funmoble
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I know of Thurston as I know the guy thats now an MD there through the peugeot 205 world!
They do mostly machining work and assembly, classic and vintage stuff, rolling road too.
Worth a Call as they may well know someone that would take the job on though
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We've used Robertsons in Colchester for machining, not sure if they change engines though.
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stealthstylz
Club Retro Rides Member
Posts: 14,834
Club RR Member Number: 174
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Engine Recon Companiesstealthstylz
@stealthstylz
Club Retro Rides Member 174
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To do the job properly there are a lot of extra costs with modern diesel engines. The N47 isn't a particularly expensive engine to do now that oil pumps have come down in price, but by the time you've got turbo, injectors, oil cooler etc on the job + fitting it can be more than double the engine cost.
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N47 chains are ridiculously common. You've done well to get to 140K! Not a bad job to do really, engine out in about 1.5hrs (chains behind the flywheel). Rarely do they bend valves (I've personally never had any and probably done at least 30 of them) but more often than not rotate the cam lobes and occasionally crack the cam carrier. Parts actually aren't that dear, think carrier and cams from BMW is less than 500 now. If it wants a carrier you're probably looking at around 2K give or take. Try finding a local BMW specialist they should be rattling them out in a couple of days.
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wodge
Part of things
Posts: 455
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To do the job properly there are a lot of extra costs with modern diesel engines. The N47 isn't a particularly expensive engine to do now that oil pumps have come down in price, but by the time you've got turbo, injectors, oil cooler etc on the job + fitting it can be more than double the engine cost. This is my concern there are loads of companies advertising supply and fitted engines for £1995 all in. But I just think they’ll hold me over a barrel if any of my ancillaries are toast. Why would I need new injectors? Impact damage? They were all fine before the sudden failure. I couldn’t really tell if it was smoking badly as it was -3 and snowing. There’s a side story to this whole saga where the AA left me on the side of the M11 for 8 hours with no heat and by the end no lights with the temp below freezing. They couldn’t even give an eta as they were still looking for someone to do the job wtaf! I paid £193 for highways to get me recovered to services in the end. Anyway the upshot of this is I ran the engine after failure so I could keep the hazards going. It did still boost at that point. It also drove out of the final AA mans dolly - yes they cancelled my truck because once I was at the services they can’t just send a truck a van has to come first. Their multi fit freewheeling wheels so they can tow an awd vehicle on the dolly are funky. no way his transit was within weight limit though. |
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wodge
Part of things
Posts: 455
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N47 chains are ridiculously common. You've done well to get to 140K! Not a bad job to do really, engine out in about 1.5hrs (chains behind the flywheel). Rarely do they bend valves (I've personally never had any and probably done at least 30 of them) but more often than not rotate the cam lobes and occasionally crack the cam carrier. Parts actually aren't that dear, think carrier and cams from BMW is less than 500 now. If it wants a carrier you're probably looking at around 2K give or take. Try finding a local BMW specialist they should be rattling them out in a couple of days. Did you do the 30 in a professional capacity? I’m willing to hire a trailer and bring wherever if it’s a job you would be interested in taking on. |
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Bmw injectors are notorious for seizing in, also they'll likely need replacing at that mileage anyway, 100k miles I think is the service life, obviously most designs will keep on going appearing to be just fine for a few hundred thousand.
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wodge
Part of things
Posts: 455
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Its been a great car to be honest but its head rather than heart decision on this one I'm fine with spending about £3k on it any more than that its probably sell it spares or repairs. I'm well out of date probably but I wouldve thought injectors alone must run at £200+ each?
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wodge
Part of things
Posts: 455
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The other thing thats odd is it still hasnt turned the eml on and its never thrown an actual code or gone in limp mode in 100,000 miles is this normal for BMWs? Its done all the service warnings and brake pads low and that sort of thing. All the PSA stuff ive had has thrown codes/limp mode for fun.
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stealthstylz
Club Retro Rides Member
Posts: 14,834
Club RR Member Number: 174
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Engine Recon Companiesstealthstylz
@stealthstylz
Club Retro Rides Member 174
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As welshpug says they get stuck in fairly often, and will be pretty tired by now anyway.
Reading your symptoms I'd be surprised if it's the timing chain. Not seen one jump before, even when they're so stretched they've worn the head and block away. Usually they're either fine, rattly or snapped.
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stealthstylz
Club Retro Rides Member
Posts: 14,834
Club RR Member Number: 174
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Engine Recon Companiesstealthstylz
@stealthstylz
Club Retro Rides Member 174
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Its been a great car to be honest but its head rather than heart decision on this one I'm fine with spending about £3k on it any more than that its probably sell it spares or repairs. I'm well out of date probably but I wouldve thought injectors alone must run at £200+ each? They're usually surprisingly cheap, one of the only cars that are. Think they were about £400+vat last set I ordered. |
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Sorry I didn't read your initial post properly regarding the fact of it still actually running. Deffo not timing chain in that case. When you say all of its oils gone, is there clouds of smoke from the exhaust although to be fair the dpf swallows a lot of it it when the turbos go on them)? Turbos aren't far off being as common as chain failure. Have you had in inlet pipe off the turbo to have a feel of the turbine shaft?
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wodge
Part of things
Posts: 455
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Update on this it does look like turbo failure. Had the pressure pipe off and it squirted 500ml of oil everywhere as soon as it hit boost. I’ll get it off and block the oil feed then run the engine with an open exhaust and inlet and see if it runs smooth once it burns all the oil that must be in the cylinders. It only seems to miss at low revs so I’m thinking it’s rich from the oil in the combustion chamber, I’m semi hopeful. Best case it’s just a new turbo required.
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Engine Recon CompaniesDarrenW
@darrenw
Club Retro Rides Member 74
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Update on this it does look like turbo failure. Had the pressure pipe off and it squirted 500ml of oil everywhere as soon as it hit boost. I’ll get it off and block the oil feed then run the engine with an open exhaust and inlet and see if it runs smooth once it burns all the oil that must be in the cylinders. It only seems to miss at low revs so I’m thinking it’s rich from the oil in the combustion chamber, I’m semi hopeful. Best case it’s just a new turbo required. That would be quite a win if it turns out to be the case! Fingers crossed... |
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wodge
Part of things
Posts: 455
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Feb 10, 2024 15:02:57 GMT
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Update on this I fitted and recon turbo the old one had loads of shaft play and curse word oil from every orifice. However sadly that wasn’t the whole story. I couldn’t get it to not smoke even though it was now consuming minimal oil still not throwing codes! So I got an old laptop going with ISTA and according to the “Smooth running test” it’s is pumping a lot of fuel into that cylinder 1. Unplugging that injector stops the smoke. I did a compression test using the glow plug hole (what a butt pucker they are getting them out without breaking) and it’s down at 110psi I was expecting 3 times that.
Do I cut my loses here I’m kinda out my depth already or should I take the rockers off and look for valve damage - I think they are one use rocker covers but might be wrong.
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