OEM 2007 Chevrolet Cobalt Timing Chain Tensioner

2007 Chevrolet Cobalt Parts Questions & Experts Answers

• Q: How to replace the timing chain tensioner on 2007 Chevrolet Cobalt?

  A: Before changing the Timing Chain Tensioner, you should disconnect the negative Battery Cable. Thereafter, remove the camshaft cover and the Timing Chain Tensioner, then the seal from tensioner after that. Check the Timing Chain Tensioner, o-ring seal, and washer for wear and damage; replace them as necessary. And measure the Timing Chain Tensioner assembly end to end; it should be supplied under a new tensioner when in the fully compressed non-active state, it measures 72mm (2.83 in) from end to end, while in an active state, it measures 85mm (3.35 in). And if the Timing Chain Tensioner does not remain in a compressed condition, remove the Piston assembly from the body of the Timing Chain Tensioner, instal the j45027 into a vise, and insert the notch end of the Piston assembly into the j45027. Convert the j 45027-1 to revolve the ratchet cylinder to the Piston. Check to ensure that the bore of the tensioner body is free of dirt and debris, as well as damage;. Clean any contaminations using a lint-free cloth and replace the tensioner in case it's damaged. Use the compressed Piston assembly to install it into the Timing Chain Tensioner body until it reaches the bottom of the bore without compressing it against the bottom. The tensioner should have a length of around 72mm(2.83m) end to end. If not, go back to the previous step. Make sure that all the dirt and debris are removed from the hole of the Cylinder Head where the Timing Chain Tensioner is threaded. Install to Timing Chain Tensioner assembly and tighten it to 75 n.m (55 lb ft). To spring the Timing Chain Tensioner, compress it 2mm (0.079hir. Rest in a rubber-nosed tool, running depth ahead on the shaft into the cam drive back to where the cam chain rests, and apply an acute pressure whereby slant upwards. Finally, you should install the camshaft cover, and reconnect the negative Battery Cable.