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      06-01-2015, 05:23 PM   #1
E90Fleet
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Arrow B58 (340i) Engine Technical Drawings and Details

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Diagrams on B58 engine. Also see more info on the BMW 340i model @ http://f30.bimmerpost.com/forums/sho....php?t=1124143

Pictured:

Turbo
Oil Pan
Oil Filter
Charge Air cooler
Cam cover
Engine cover
Coolant pump and heat management unit (note pump is mechanical, not electrical)


Compared to N55:

New cylinder head design (better cleaning so less carbon buildup on valve stems)
New charge air cooler (Intercooler)
New type of thermostat
Dedicate turbo electric coolant pump
Mechanical coolant pump (from electric)
Modified oil filters
Smaller, faster valvetronic


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      06-01-2015, 05:40 PM   #2
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Turbo gets its own cooling pump (part no 4)
Regular coolant pump shown above is mechanical, not electrical like older engines
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Last edited by E90Fleet; 06-01-2015 at 05:46 PM..
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      06-01-2015, 05:45 PM   #3
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closed deck?
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      06-01-2015, 05:49 PM   #4
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Belt run
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      06-01-2015, 05:51 PM   #5
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Cylinder Head with new smaller and relocated valvetronic actuator (9)
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      06-01-2015, 05:56 PM   #6
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So what are the big differences here from the N55.

I like that is a mechanical pump, one less electronic thing to fail (as water pumps in general are known to fail on BMW)
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      06-01-2015, 06:08 PM   #7
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Quote:
Originally Posted by smithf32 View Post
So what are the big differences here from the N55.

I like that is a mechanical pump, one less electronic thing to fail (as water pumps in general are known to fail on BMW)
Everything

New cylinder head design (better cleaning so less carbon buildup on valve stems)
New charge air cooler (Intercooler)
New type of thermostat
Dedicate turbo electric coolant pump
Mechanical coolant pump (from electric)
Modified oil filters
Smaller, faster valvetronic
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Last edited by E90Fleet; 06-01-2015 at 06:20 PM..
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      06-01-2015, 06:11 PM   #8
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Quote:
Originally Posted by E90Fleet
Quote:
Originally Posted by smithf32 View Post
So what are the big differences here from the N55.

I like that is a mechanical pump, one less electronic thing to fail (as water pumps in general are known to fail on BMW)
Everything

New cylinder head design
New charge air cooler (Intercooler)
New type of thermostat
Dedicate turbo electric coolant pump
Mechanical coolant pump (from electric)
Modified oil filters
Wow this seems like a motor that can take some abuse. I've never heard of a turbo having its own designated cooling system.
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      06-01-2015, 06:29 PM   #9
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Quote:
Originally Posted by Eddien123 View Post
I've never heard of a turbo having its own designated cooling system.
The BMW V8 and V12 engines have dedicated turbo electric coolant pumps
Same on I8 engine (B38)
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      06-01-2015, 06:43 PM   #10
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Quote:
Originally Posted by E90Fleet
Quote:
Originally Posted by smithf32 View Post
So what are the big differences here from the N55.

I like that is a mechanical pump, one less electronic thing to fail (as water pumps in general are known to fail on BMW)
Everything

New cylinder head design (better cleaning so less carbon buildup on valve stems)
New charge air cooler (Intercooler)
New type of thermostat
Dedicate turbo electric coolant pump
Mechanical coolant pump (from electric)
Modified oil filters
Smaller, faster valvetronic
+1

You answered my question before I could ask it.

I'm glad BMW has made a change to hopefully address the carbon buildup issues. I've seen some really gunked up valves.
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      06-01-2015, 06:45 PM   #11
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Quote:
Originally Posted by E90Fleet
Quote:
Originally Posted by Eddien123 View Post
I've never heard of a turbo having its own designated cooling system.
The BMW V8 and V10 engines have dedicated turbo electric coolant pumps
Same on I8 engine (B38)
What BMW V10 engine is turbod?
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      06-01-2015, 06:51 PM   #12
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Quote:
Originally Posted by Eddien123 View Post
What BMW V10 engine is turbod?
Sorry, typo, meant N74 V12
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      06-01-2015, 07:29 PM   #13
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Is the orientation reversed? If so, how does one replace a timing chain and ancillaries?
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      06-01-2015, 07:36 PM   #14
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Quote:
Originally Posted by Daftasabrush View Post
Is the orientation reversed? If so, how does one replace a timing chain and ancillaries?
Yes, the VANOS, upper and lower timing chains and oil pump chain are now on the rear of the engine.
Probably an engine out procedure to change now.
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      06-01-2015, 07:49 PM   #15
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any pictures of the fuel system?
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      06-01-2015, 07:57 PM   #16
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Quote:
Originally Posted by drexplode View Post
any pictures of the fuel system?
Injectors plug directly into metal fuel rails.
No more connecting metal hoses
3 Injectors per rail
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      06-01-2015, 09:13 PM   #17
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Thanks. Very interesting!
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      06-01-2015, 10:59 PM   #18
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Quote:
Originally Posted by E90Fleet View Post
Yes, the VANOS, upper and lower timing chains and oil pump chain are now on the rear of the engine.
Probably an engine out procedure to change now.
Oh, wonderful. Having the timing chain in a place that requires pulling the engine to replace worked out well with the N47

This might be a deal breaker for me is I want a car I can keep for a long time.
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      06-02-2015, 01:35 AM   #19
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Quote:
Originally Posted by E90Fleet
Quote:
Originally Posted by Eddien123 View Post
What BMW V10 engine is turbod?
Sorry, typo, meant N74 V12
Oh ok. Thanks I didn't know that.
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      06-02-2015, 09:36 AM   #20
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It's interesting that BMW has gone to a mechanical, belt-driven turbo cooler at a time when drag on the engine is taken so seriously because of fuel economy standards.
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      06-02-2015, 10:33 AM   #21
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Thanks for posting this E90Fleet. Interesting info.

That new oil filter looks abut twice the size of the current version.
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      06-02-2015, 11:01 AM   #22
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Quote:
Originally Posted by Weaselboy
That new oil filter looks abut twice the size of the current version.
I was going to say that new filter looks small, maybe half the size. I think it's thinner. It also looks to be in a very tight spot, changing that should be... interesting.

I don't see the charge air cooler, did OP mean to say intake manifold?

The mechanical water pump appears to have an actuator, I have to believe BMW wants/needs to retain the on-demand nature of the flow for efficiency.
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