BMW E91 2008 Touring with engine N43B20A with 258tkm
How to assembly it
PART 0 - Removing timing chain and intake camshaft
Here in this video I am removing timing chain and intake camshaft
Original problem was not there… read symptoms, see video and see whole series :)
This is where all started.
Symptoms:
After starting cold engine: Misfires after 30-60 seconds from starting
1. At first when the car started cold; engine idle running was uneven
and the engine malfunction light came on. The uneven idle running
was occurred with heavy vibration. After restarting the engine,
the car was operating normally. At first, this was rare.
2. A few months ahead, the fault worsened with vibrations at each start-up and later the car had to be started more often before the idle running was
relatively smooth. At the slow speeds on the road, you can feel some unevenness.
3. Eventually, the fault worsened to the point that restarting was no longer helpful. About 30-60 seconds after the car was restarted, the engine malfunction light came on and the engine control unit shut down one cylinder. It didn't matter whether the engine was cold or warm.
4. In the end, the car no longer made any sense to drive.
Actions taken during the fault:
- The new plugs and ignition coils did nothing to help the situation.
- BMW's ISTA-D application suggested replacing all fuel injectors.
- There is no problem with the fuel supply and the fuel pressure was fine.
- If the fault is not in the spark plugs, ignition coils, fuel injectors,
fuel supply, and there is no intake and exhaust leakages then the fault must be mechanical.
- The new fuel injectors would have cost around € 1,200 on the original.
I ordered "new" fuel injectors from EBay and the problem just got worse.
These fuel injectors were fakes.
- In reality, they were the first versions of the BMW injector series that BMW itself has rejected!
- The money lost at this point was 260 euros.
- It is not ideal to replace the new original injectors when there was no certainty that they would be defective.
Repair workshop diagnosis:
- Intake Cam Shaft has elapsed (1 cylinder cams)
- The timing chain is stretched
- This repair would have cost with them around € 2,300 with parts and labor.
- No thanks!
To perform a workshop diagnosis repair byself:
- the intake camshaft was certainly slightly worn (the cams of the cylinder 1.)
- I found a used camshaft on Ebay for € 94.80 !! This turned out to be a good and good investment. 😊
- New parts: 2 x new rocker arms and 2 x hydraulic aligment elements, timing belt parts, V-belt, coolants, oils, seals, etc…
The price for these parts came to 395,00 €, which also includes a 85,00 € timing tool from EBay.
To locate a mechanical fault:
- With Engine cylinder Leakage Test I found leakage in cylinders 3 and 4. These two cylinders leaked to each other.
- When firing air pressure from the spark plug hole to 3. cylinder, air came out of the 4 cylinder spark plug hole and vice versa.
- Pressure did not come out from intake side or exhaust side or coolant reservoir
- The fault must then be in the head gasket or the cylinder block between them.
Actual failure:
- After removing the head, the fault was found; the head gasket was broken between the 3rd and 4th cylinders.
- This disrupted the engine running and caused the engine to run unevenly.
- In addition, there were small grooves in the head and block surface, just at the crack of the head gasket.
- Because of this, I had to use both of them for grinding at the engine shop. At the same time, they also replaced the valve steam seals and checked the valves.
Thoughts:
This is my first motor repair, so if you see any amateur mistakes on these videos, try to understand 😉
The car has been driven for a while now after rebuild and the engine is running as it should.
You can follow me also in Instagram, facebook and Youtube:
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I made video series on youtube of assembling the engine. Check out the videos from my channel, if you want to know how things went ... 😉
I hope these videos help those who want to do the same for the N43 engine themselves.
This engine repair cost me around 1300 € + new clutch parts; flywheel and clutch plates etc. 800 euro.
The total price was approximately 2100.00 €.
I can only imagine how much this whole project would have cost at the garage.
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Music:
Runaway by Diamond Ace | [ Ссылка ]
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