E39 M5 Timing Chain Tensioner Replacement
When we bought our 2003 E39 M5 on our birthday at the end of July this year it had ~80k miles on it. The biggest issue with this car was light timing chain noise during warm up.
This is a common issue with the S62 engines and the main two culprits are worn timing chain guides and timing chain tensioner. This post explains how the timing chain tensioner was replaced. We do plan on changing out the chain guides as well, but considering it takes quite a bit of engine disassembly we chose to do the tensioner first.
Parts and tools needed:
11311406261 – 1x S62 timing chain tensioner
07119963355 – 1x crush washer for the tensioner
Wobble extension for easier access
Torque wrench to achieve final torque of 37 ft/lbs.
Gaining access to the timing chain tensioner
To gain access to the timing chain tensioner the passenger side air filter housing needs to be rotated up and out of the way. This can be done by loosening the hose clamp where it attaches to the intake manifold. The bottom portion of the air filter housing also has to be removed.
Air filter housing rotated up and out of the way.
OE BMW air filter.
Quite a bit of sand and grit in the bottom of the air filter housing.
Bottom of the air filter housing removed. This is done by loosening the hose clamp on the bottom intake hose.
With the housing removed it allows access to the lower side of the passenger side of the S62 block where the timing chain tensioner is bolted in.
Using a handy dandy mirror the location of the timing chain tensioner is revealed. Remove the tensioner with the 19mm socket.
Timing chain tensioner removed.
Mirror showing hole where timing chain tensioner resides.
New timing chain tensioner with new gasket ring installed.
Installing new tensioner and torquing to spec.
Mirror showing that timing chain tensioner is correctly seated and installed. Assembly is of course the reverse of removal. Clean up any oil spills and install the passenger side airbox back in the vehicle.
The timing chain noise reduced by quite a bit after installing the tensioner, but it is still audible which is due to worn chain guides. Next plans are to remove the engine and transmission from the vehicle to replace the chain guides, rebuild the VANOS system, replaced rod bearings and clutch and flywheel.
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