How to Replace timing chain on BMW 316D E90 2009-2012

BMW

Special tools

  • Camshaft alignment tool – BMW No.11 8 760.
  • Crankshaft holding tool – BMW No.11 4 320.
  • Crankshaft pulley turning tool – BMW No.11 6 480.
  • Flywheel/drive plate timing pin – BMW No.11 5 320.
  • High-pressure fuel pump sprocket removal tool – BMW No.11 8 740.
  • Tensioner locking pin – BMW No.11 3 340.

General precautions

  • Disconnect battery earth lead.
  • Remove glow plugs to ease turning engine.
  • Turn engine in normal direction of rotation (unless otherwise stated).
  • Observe tightening torques.
  • If fitted: Mark position of crankshaft position (CKP) sensor before removal.
  • Do NOT turn crankshaft via camshaft or other sprockets.
  • Do NOT turn crankshaft or camshaft with timing chain removed.

Valve timing procedures

Removal

  • Removal/installation of timing chain requires:
      • Engine removal.
      • Cylinder head removal.
      • Oil pump chain removal.
      • Sump removal.

NOTE: Timing chains located at rear of engine.

  • Engine at TDC on No.1 cylinder.
  • Ensure camshaft lobes positioned as shown [1] .
  • Insert flywheel/drive plate timing pin [2] .
  • Ensure timing marks on rear of camshaft gears aligned [3] .
  • Install camshaft alignment tool [4] .
  • Ensure camshaft alignment tool abuts cylinder head.
  • Remove secondary timing chain tensioner [5] .

NOTE: If chain tensioner is to be re-used it must be drained of oil. Compress plunger slowly twice.

  • Slacken camshaft sprocket bolts [6] .
  • Remove camshaft sprocket.
  • Remove camshaft carrier assembly.
  • Remove cylinder head.
  • Remove secondary timing chain tensioner rail and chain.
  • Install crankshaft holding tool [7] . Secure tool with bolt [8] .
  • Slacken high-pressure fuel pump sprocket bolt [9] .
  • Remove high-pressure fuel pump sprocket. Use high-pressure fuel pump sprocket removal tool.
  • Compress primary timing chain tensioner and lock with pin [10] .
  • Remove primary timing chain tensioner [11] .
  • Remove primary timing chain guide and tensioner rail.
  • Remove crankshaft holding tool [7] .
  • Remove high-pressure fuel pump sprocket complete with primary timing chain.

Installation

  • Fit primary timing chain to crankshaft sprocket.
  • Install crankshaft holding tool [7] . Secure tool with bolt [8] .
  • Crankshaft position set at 45° ATDC No.1 cylinder.
  • Ensure groove on high-pressure fuel pump shaft aligned with lug on timing case [12] .
  • Install high-pressure fuel pump sprocket.
  • Ensure timing mark on high-pressure fuel pump sprocket aligned with lug on timing case [13] .
  • Tighten high-pressure fuel pump sprocket bolt [9] . Tightening torque: 65 Nm.
  • Install primary timing chain guide and tensioner rail.
  • Install primary timing chain tensioner [11] .
  • Remove tensioner locking pin [10] .
  • Install secondary timing chain tensioner rail.
  • Install secondary timing chain.
  • Remove crankshaft holding tool [7] .
  • Install oil pump chain.
  • Fit timing chain cover and flywheel.
  • Turn crankshaft anti-clockwise 45°.
  • Insert flywheel/drive plate timing pin [2] .
  • Install cylinder head.
  • Ensure timing marks on rear of camshaft gears aligned [3] .
  • Install camshaft carrier assembly.
  • Install camshaft alignment tool [4] .
  • Install camshaft sprocket.
  • Temporarily tighten camshaft sprocket bolts [6] . Tightening torque: 10 Nm.
  • Slacken camshaft sprocket bolts 90° [6] .
  • Install secondary timing chain tensioner [5] . Tightening torque: 70 Nm.
  • Tighten camshaft sprocket bolts [6] . Tightening torque: 15 Nm.
  • Remove special tools [2] [4] .
  • Turn crankshaft two turns clockwise.
  • Insert flywheel/drive plate timing pin [2] .
  • Ensure timing marks on camshaft gears aligned [3] .
  • Ensure camshaft alignment tool abuts cylinder head [4] .
  • Remove special tools [2] [4] .
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Bent Valves
Timing Tools?
Misconception
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Bent Valves

What happens when your chain or belt breaks. 

The timing of course becomes way off. Your crankshaft will always spin making the pistons move up and down. However the valves will remain in the position they were in when the belt or chain stopped working. 

Half of the valves will be stuck open and in the way of the pistons. Not all engines, but most. The piston out of valve time will smash right into the open valve and bend the, The only way to fix that is to remove the head and place those valves. 

If you think your valves might have been damaged.

Remove all the spark plugs, valve covers. With both valves in the closed position insert a compression tester hose in place of the spark plug and inject air into the hose and see if the cylinder can hold air. If both valve are closed and air can not be held, chances are you have bent valves.   

 

Timing Tools?

Do you need special tools to time your engine? Not always, on all my post I'll indicate that in each post if you do or not. 

But what are these special tools? Normally you would just line up some marks on the cam and crank gears and simply be done with it. However when these tools are needed they are very very important. 

The last one I did was a 2013 Range Rover 2.0 Turbo with dual cams. There were not timing marks at all. 

There is a small threaded plug on the back of the engine that I removed to insert a special threaded pin that would rest up against the weight of the crankshaft to prevent for DTC of the #1 piston. No further clockwise rotation would be possible. At that point I installed the supplied crankshaft lock by removing the starter. 

Then you line up the back of both camshafts to a notch in each camshafts to each other that a flat tool connects to each cam so they are in line with each other. But first you would make sure both intake and exhaust valves are closed DTC of the cams. 

And the last tool was to lineup the crankshaft position sensor. 

 

Misconception

The most important thing in any major engine work is to rotate the engine by hand at least two complete rotations. And do it easy and slow and with the spark plugs removed. 

Why remove the spark plugs? you may ask. Simple, with the plugs in place you'll be creating compression, making the engine harder to turn by hand and perhaps giving you the misconception of valves hitting the pistons or is it compression.  

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