SOURCE: 98 Saturn sc1 timing chain noise
need to have a shop fix it asap.if the chain breaks or skips timing your entire could possibly need to be replaced.replacing a serpentine belt tensioner is fairly cheap and easy
SOURCE: whining noise after water pump installation
If it's a 2.2 there is a special tool that holds chain while servicing the H2O pump.If you didn't have it the chain slipped & is now too tight causing the whine.You will need to take everthing apart.I woulr recommend replacing the chain & all guides(kit) Hope this helps
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