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Discussion Starter · #1 ·
Hello, I have a 535i which I have owned almost since new. 2011 year
Done about 150,000 klms and the engine has spun a big end bearing.
So my choices are fit recon engine or find used engine or sell the car part by part.
Anyone got interest in it or know of a good engine? Much demand for these as parts?
this has diminished my respect for BMW considerably as the car has been serviced well above manufacturers recommendations. I thought the engines were the best part.
 

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Hey man, I feel your pain. My 2015 535i just failed with 35,000 miles on the clock, spun bearings, engine seized. I was very good about the maintenance on this, currently having low mile engine installed. I don’t know if I can trust the car after this.
 

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You two are freaking me out. My N55 has 77k miles on it.

Somebody, maybe HotGrbg, said that it's important to prime the oil pump when changing the oil. I do this by pouring oil down the empty filter housing until it stops draining down the hole. Then I put in a little more and install the filter and housing cap. Doing this, I don't get a red low-oil-pressure light when I start the car after doing the oil change.
 

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I just bought a 2011 F10 535i with really good spec from auction with engine noise warning on it for £2k, it has a very very light tick/tap around 3000 rpm which will be bearing so im going to build it, it was there for a few months i think everybody was scared of it with the price of engines so got it for a steal.
 

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Discussion Starter · #5 ·
Hey man, I feel your pain. My 2015 535i just failed with 35,000 miles on the clock, spun bearings, engine seized. I was very good about the maintenance on this, currently having low mile engine installed. I don’t know if I can trust the car after this.
Thanks Oscar. its a real pain in the arse isn't it. Has anyone suggested why this bottom end damage is so prevalent with this engine?
 

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Discussion Starter · #6 ·
You two are freaking me out. My N55 has 77k miles on it.

Somebody, maybe HotGrbg, said that it's important to prime the oil pump when changing the oil. I do this by pouring oil down the empty filter housing until it stops draining down the hole. Then I put in a little more and install the filter and housing cap. Doing this, I don't get a red low-oil-pressure light when I start the car after doing the oil change.
Thanks for your input. You have to wonder why ( not doing) this oil prime might damage the engine in such a short lifespan. How many oil/ filter changes do you typically do in 150,000 klms ( 93,000 miles) ? very 20k or 40k is recommended. Its a mystery that only BMW know the reason for I suspect.
 

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Discussion Starter · #8 ·
I just bought a 2011 F10 535i with really good spec from auction with engine noise warning on it for £2k, it has a very very light tick/tap around 3000 rpm which will be bearing so im going to build it, it was there for a few months i think everybody was scared of it with the price of engines so got it for a steal.
You bought that one well Frank. Mine had exactly the same rattle at the start, and around those revs. Under that and it sounded sweet. Mechanic did an in chassis rebuild ( dropped front suspension and sump) , crank measured up fine with no damage. Replaced all the big end bearings and at about 2500 klms after rebuild it started again. Pulled it down again and its spun a bearing and damaged the crank. I'm leaning towards a rebuilt exchange engine ( about Aud $10K) .
keep it for 6 months and sell it. Car is only worth maybe $20k with new engine. As it is now about 10% of that.
Cheers Michael.
 

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Thanks Oscar. its a real pain in the arse isn't it. Has anyone suggested why this bottom end damage is so prevalent with this engine?
I live in a cold climate and when mine failed it was -15 below F. The tech said this motor is very sensitive to cold starts. Basically the oil pump failed due to something and it starved the engine. I’m having a block heater installed on it and will allow more warm up time in the future. Not sure mine was typical or not, but the tech says he had replaced several N55’s over the years. I bought the car with 30k miles on it, so I guess I can’t vouch for maintenance history. What pisses me off is I bought it with cash and made the decision not to get warranty as I figured even a transmission failure would be ok out of pocket, I just figured engine failure was so rare that a 4K warranty was unlikely to ever pay for itself when figuring in deductibles. Sorry for the rant, but it sucks. I love the car, easily the nicest I’ve ever owned, still tight and rattle free at seven years old.
 

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Discussion Starter · #11 ·
Hello, I have a 535i which I have owned almost since new. 2011 year
Done about 150,000 klms and the engine has spun a big end bearing.
So my choices are fit recon engine or find used engine or sell the car part by part.
Anyone got interest in it or know of a good engine? Much demand for these as parts?
this has diminished my respect for BMW considerably as the car has been serviced well above manufacturers recommendations. I thought the engines were the best part.
An update for all the owners of this F10 535i model. I finally found a local expert on these cars. He has a workshop specialising in BMW mechanical repairs. I told him my sorry tale and he said yes I expect your car has done about 150 / 160 klms ? I confirmed it has. He says he rebuilds 3 or 4 per month ; this engine amongst others, should have the big end bearings replaced as a matter of course, between 100,000 to 150,000 kilometres.
he said its relatively inexpensive doing it before the big end rattle starts.
Drop suspension and then sump.
Mine has been done incorrectly ( should have had conrod replaced on failed bearing ), having spun bearing will now require a new crankshaft which is prohibitive, source a used engine, rebuild it and start again Some costly mistakes but at least I know what's happened.
Cheers Michael.
PS any one know of an engine for sale?
 
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