OEM 2003 GMC Safari Timing Chain

2003 GMC Safari Parts Questions & Experts Answers

• Q: How to replace the timing chain and sprockets on 2003 GMC Safari?

  A: Begin by uninstalling the engine front cover together with the Crankshaft position sensor reluctor ring to replace the Timing Chain and sprockets. Board a 7/16-20 x 1 inch bolt into the end of the Crankshaft but maintain a bolt length that does not exceed one inch while choosing anything other than the Crankshaft balancer bolt to prevent thread damage to both components. In preparation for removing the Timing Chain align the timing marks first and follow up by releasing or removing valve rocker arms whenever necessary to stop piston-valve contact. Use the Crankshaft to rotate until both sprocket timing marks become visible when the cylinder number four reaches top dead center (TDC) during compression. First clean and inspect the Timing Chain and sprockets before removal. Follow these steps for Timing Chain setup: first install the sprockets then remove the Crankshaft bolt before adding the new engine front cover to defend against oil leaks.