Secondary timing chain set (for water pump/balancer shaft), aftermarket
If a slapping rubbing noise can be heard in the front engine area when the engine is cold, it is highly likely that the slide rail of the secondary timing chain drive for the balancer shaft / water pump is broken. This damage affects around 1/4 of all GTs with a mileage of 75,000 km or more.
Visual inspection of a broken tensioning rail for the water pump drive is possible via an inspection opening for the water pump.
Secondary timing chain set without sprockets, aftermarket
If the sprockets are still in order, we offer her a high quality aftermarket set for the secondary timing chain without sprockets, from european maufacturers like Schäffler / INA /SKF.
Scope of delivery secondary timing chain set without sprockets:
Balancer shaft chain (like GM 12645237 /
12635427)
Balancer shaft chain tensioner (like GM 90537300)
Chain tensioner rail (like GM 90537299)
Slide rail (like GM 90537336)
Slide rail (like GM 90537369)
You also may need a gasket set
Please also remember the required seals for the front cover, Made in Germany, which we also offer. Regardless of whether you are replacing the primary or secondary timing chain, the identical seal set is only required once!
Tip:
When replacing the secondary timing chain, it is advisable to replace the water pump and the primary timing chain drive.
