N52N head bolt no access

kburger · 06-21-2023, 10:21 AM

Hey addicts. Kburger here. Got the wife’s 2013 128i convertible with n52n engine. Got another thread here don’t think it got any attention. So the engine seized we bought the car at 80k we think they sold it to us knowing the engine was gonna fail. But we got 60k out of it. So 140k now. I’m rebuilding the old engine just one hopefully easy question for you guys. Bentley says remove the head bolts for the timing chain cover first. It says to move the plastic chain guide out of the way to access the one bolt. It’s on the intake side. There is NO way to get the chain guide out of the way without destroying it. Is the only solution to remove the timing chain cover? Thanks In advance.
Kburger

kburger · 06-21-2023, 05:03 PM

Am I doing something wrong? On e46 fanatics I would have a few knowledgeable people helping me. Here I never get any replies.
Kburger

krhodes1 · 06-21-2023, 05:06 PM

Quote:

Originally Posted by kburger

Am I doing something wrong? On e46 fanatics I would have a few knowledgeable people helping me. Here I never get any replies.
Kburger

Post this to the e90 forum - same engine, WAAAAAY more traffic.

kburger · 06-21-2023, 07:25 PM

Thanks much I’ll give it a shot.
Kburger

GoRomeo · 07-03-2023, 07:13 PM

E90 forum we are cool 😎😂

4JawChuck · 07-10-2023, 04:23 PM

There are three threaded pins under large Allen head plugs on the front of the engine, remove these plugs to access the threaded pins that hold the tensioner assembly in the engine. The passenger side white chain guide is snapped into slots on the drivers side chain tensioner, simply pry the plastic guide open to withdraw that piece first, you can’t get the tensioner out in one piece with the chain still installed hence the two piece assembly.

Suggest you unscrew the chain tensioner plunger assembly on the passenger side before doing the above, it’s a large aluminum bolt…impossible to miss. The tensioner plunger is simply spring loaded, no oil supplied like other engines are constructed.

06-21-2023, 10:21 AM	#1
kburger New Member 3 Rep 11 Posts Drives: 2013 128i Join Date: Mar 2020 Location: easton PA iTrader: (0)	N52N head bolt no access Hey addicts. Kburger here. Got the wife’s 2013 128i convertible with n52n engine. Got another thread here don’t think it got any attention. So the engine seized we bought the car at 80k we think they sold it to us knowing the engine was gonna fail. But we got 60k out of it. So 140k now. I’m rebuilding the old engine just one hopefully easy question for you guys. Bentley says remove the head bolts for the timing chain cover first. It says to move the plastic chain guide out of the way to access the one bolt. It’s on the intake side. There is NO way to get the chain guide out of the way without destroying it. Is the only solution to remove the timing chain cover? Thanks In advance. Kburger
	Appreciate 0 Tweet Quote

06-21-2023, 05:03 PM	#2
kburger New Member 3 Rep 11 Posts Drives: 2013 128i Join Date: Mar 2020 Location: easton PA iTrader: (0)	Am I doing something wrong? On e46 fanatics I would have a few knowledgeable people helping me. Here I never get any replies. Kburger
	Appreciate 1 GoRomeo963.50 Quote

06-21-2023, 07:25 PM	#4
kburger New Member 3 Rep 11 Posts Drives: 2013 128i Join Date: Mar 2020 Location: easton PA iTrader: (0)	Thanks much I’ll give it a shot. Kburger
	Appreciate 0 Quote

07-03-2023, 07:13 PM	#5
GoRomeo Brigadier General 964 Rep 3,854 Posts Drives: 330i, 135i Join Date: Feb 2006 Location: San Diego CA iTrader: (0) Garage List 2008 BMW 135i [9.50] 2006 330i [6.75]	E90 forum we are cool 😎😂
	Appreciate 0 Quote

07-10-2023, 04:23 PM	#6
4JawChuck Private First Class 216 Rep 104 Posts Drives: 2013 128i SE Join Date: Feb 2023 Location: Canada iTrader: (0)	There are three threaded pins under large Allen head plugs on the front of the engine, remove these plugs to access the threaded pins that hold the tensioner assembly in the engine. The passenger side white chain guide is snapped into slots on the drivers side chain tensioner, simply pry the plastic guide open to withdraw that piece first, you can’t get the tensioner out in one piece with the chain still installed hence the two piece assembly. Suggest you unscrew the chain tensioner plunger assembly on the passenger side before doing the above, it’s a large aluminum bolt…impossible to miss. The tensioner plunger is simply spring loaded, no oil supplied like other engines are constructed.
	Appreciate 0 Quote