N54 misfire cylinder 3 help! Found out some problems

domdom18 · 11-29-2019, 12:09 PM

There are 2 intake valves in one cyl. When cleaning notice 1 up 1 down.
Suppose to open close together? If yes., What to do?
Need to lift engine out for repair? What to check ? Don't wanna believe the valve springs broken.
Thanks everyone

iqraceworks · 11-29-2019, 12:21 PM

Pull the cylinder head off.....no need to pull motor.

Was the motor running ok before you noticed this??

domdom18 · 11-29-2019, 12:28 PM

Quote:

Originally Posted by iqraceworks

Pull the cylinder head off.....no need to pull motor.

Was the motor running ok before you noticed this??

Nop. Code was shown cyl 3 misfire.... Swapped coils spark plugs injectors. Still cyl 3

iqraceworks · 11-29-2019, 01:09 PM

Do a compression test on each cylinder.

mweisdorfer · 11-30-2019, 08:24 AM

Quote:

Originally Posted by domdom18

Quote:

Originally Posted by iqraceworks

Pull the cylinder head off.....no need to pull motor.

Was the motor running ok before you noticed this??

Nop. Code was shown cyl 3 misfire.... Swapped coils spark plugs injectors. Still cyl 3

Is this code with a BMW specific code reader / software?

domdom18 · 11-30-2019, 10:41 AM

Code was read with bt cable . My valve was stuck in the open position. Do I need to replace springs? Lift the cam rod?

iqraceworks · 11-30-2019, 12:40 PM

Quote:

Originally Posted by domdom18

Code was read with bt cable . My valve was stuck in the open position. Do I need to replace springs? Lift the cam rod?

Reguardless of the problem.....you need to pull the cylinder head off. Could be bad valve guide, broken spring, crap on valve, etc..etc.

relative4 · 12-01-2019, 08:44 AM

Quote:

Originally Posted by iqraceworks

Reguardless of the problem.....you need to pull the cylinder head off. Could be bad valve guide, broken spring, crap on valve, etc..etc.

Easy tiger, it is NOT time to pull the head.
Start wih a compression test.
After that, you'll likely be pulling the valve cover for further diagnosis.
A stuck valve can usually be repaired without pulling the head.

iqraceworks · 12-01-2019, 11:16 AM

Quote:

Originally Posted by relative4

Easy tiger, it is NOT time to pull the head.
Start wih a compression test.
After that, you'll likely be pulling the valve cover for further diagnosis.
A stuck valve can usually be repaired without pulling the head.

Sure.....you can knock it lose, but to fix it right (new valve + new valve guide) you need to put the head. There is a reason the valve stuck.....and just knocking is lose isn't going to solve anything.

11-29-2019, 12:09 PM	#1
domdom18 New Member 0 Rep 6 Posts Drives: e92 335i Join Date: Feb 2014 Location: hong kong iTrader: (0)	N54 misfire cylinder 3 help! Found out some problems There are 2 intake valves in one cyl. When cleaning notice 1 up 1 down. Suppose to open close together? If yes., What to do? Need to lift engine out for repair? What to check ? Don't wanna believe the valve springs broken. Thanks everyone
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11-29-2019, 12:21 PM	#2
iqraceworks Brigadier General 2001 Rep 3,731 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Pull the cylinder head off.....no need to pull motor. Was the motor running ok before you noticed this??
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11-29-2019, 01:09 PM	#4
iqraceworks Brigadier General 2001 Rep 3,731 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Do a compression test on each cylinder.
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11-30-2019, 10:41 AM	#6
domdom18 New Member 0 Rep 6 Posts Drives: e92 335i Join Date: Feb 2014 Location: hong kong iTrader: (0)	Code was read with bt cable . My valve was stuck in the open position. Do I need to replace springs? Lift the cam rod?
	Appreciate 0 Quote