Secondary timing chain set (water pump/balancer shaft), genuine GM parts
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, genuine GM
We only offer original GM spare parts here, which you can also have installed by an Opel dealer, as only then can the dealer give a guarantee on his repair. This is not possible with cheaper timing chain kits from the aftermarket, which are often of dubious quality. If necessary, have the dealer order the parts from us himself!
If the sprockets are still in order, we offer a set of original GM spare parts to replace the complete secondary timing chain drive, most of which are no longer available in Europe. Most Opel workshops now also order from us.
Scope of delivery secondary timing chain set without sprockets:
Balancer shaft chain (original GM 12645237 /
12635427)
Balancer shaft chain tensioner (original GM 90537300)
Chain tensioner rail (original GM 90537299)
Slide rail (original GM 90537336)
Slide rail (original GM 90537369)
Option 1: plus gasket set secondary drive, plus 29,99 Euro
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!
Option 2: plus gear set secondary drive, plus 199,00 Euro
The water pump and the two balancer shafts are driven by gear wheels.
The crankshaft is fitted with a special gearwheel with shock absorber, which is NOT included in any aftermarket timing chain set. The water pump sprocket is not included in this set as it is often supplied with a new water pump.
Crankshaft sprocket with shock absorber (original GM 55557168 / 12642713)
Balance shaft gear 1 (original GM Original GM 90537295 or OEM INA/SKF improved design)
Balance shaft gear 2 (original GM GM 90537435 or OEM INA/SKF improved design)
Please add options to the shopping cart via the drop-down menu.
Tip:
When replacing the secondary timing chain, it is advisable to replace the water pump and the primary timing chain drive.
