Whilst the timing chain is a fairly wear-resistant part compared to other components, it will eventually wear out as the chain stretches over time. It is vital that the timing chain is replaced at intervals recommended by the manufacturer, as failure can cause severe damage to the engine.
To replace the timing chain, you will need a timing chain kit, new water pump and sealant, as well as locking tools and any fluids that need replacing. Whilst every vehicle model will have slightly different fitting procedures, the general steps are as follows:
- Unbolt and remove the rocker cover. Inspect the seals and replace if necessary.
- Using the pulley holding tool, unbolt and remove the engine mounting bracket, followed by the water pump.
- Next, set the number one cylinder to top dead centre. Turn the crankshaft pulley until the marks on the crankshaft pulley and camshaft are aligned with their designated timing marks.
- Using the pulley holding tool, loosen the crankshaft pulley retaining bolt and remove the pulley. Inspect the pulley for damage and wear, and replace if necessary.
- Remove the timing cover, which also houses the oil pump, followed by the chain tensioner assembly and timing chain tensioner rail. Then unbolt and remove the timing chain guide.
- Unbolt the camshaft timing sprocket and remove it together with the timing chain. And then remove the crankshaft timing sprocket.
- Clean the contact surfaces on the engine, ensuring no debris enters the inner working of the engine.
- Inspect the crankshaft sprocket using a Vernier calliper.
- You can now begin to replace all the timing components using the febi bilstein timing chain kit.
- First, fit the new crankshaft timing sprocket. Then fit the new camshaft sprocket and timing chain together. It is important to make sure that the camshaft and crankshaft sprocket timing marks are aligned correctly with the timing chain.
- You can now fit the new timing chain guide, the tensioner rail and tensioner assembly. Tighten the bolts to the correct torque as outlined by the vehicle manufacturer.
- Replace the oil pump ‘O’ rings.
- Clean the contact surfaces of the timing chain cover and fit the new crankshaft oil seal.
- Replace the timing chain cover gasket or use sealant and then refit the timing chain cover.
- Check the original water pump for any wear or damage and replace if necessary. After fitting the pump, tighten the bolts to the correct torque as outlined by the manufacturer.
- Refit the timing case cover, followed by the engine mounting bracket and tighten the bolts to the correct torque as outlined by the vehicle manufacturer.
- Refit the crankshaft pulley, and water pump pulley, ensuring all bolts are tightened to the correct torque.
- Replace the old rocker cover gasket.
- Refit the rocker cover
- Once completed, refit all engine auxiliaries, replace the engine oil and filter using the correct grade of oil. Fill cooling system with new coolant. Run the engine to ensure there are no leaks and road test to ensure correct operation of the vehicle.
Note: The chain is located inside the engine as it needs to be lubricated by the engine oil in order to function correctly. Lack of oil changes, low oil level or poor oil quality can cause the timing chain to wear faster.
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The febi product brand is part of the bilstein group, which also incorporates the strong SWAG and Blue Print brands. Further information can be found at: www.bilsteingroup.com