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Yes the timing cover gasket can leak coolant. The coolant passes the waterpump and is pump into the engine block thru the timing cover. to see the actual leak jack up passenger side of car support with jack stand take off wheel and the splash guard now you can see the crank shaft pulley look up at waterpump on both side it goes back to engine block with a mirror you can see it leak.
Good chance you have a cracked head. (or possibly warped). There are many passages that are close enough together but don't share proximity to the cylinder, where coolant can migrate from a water jacket to an oil passage yet never enter a cylinder at all.You also need to check the block deck as well to make sure there aren't any defects there.
CHECK FOR LEAKING WATER PUMP WEEP HOLE OR GASKET.ALSO CHECK WATER PUMP HOSE FOR LEAKS.IF ALL LOOKS GOOD.YOU COULD HAVE PINHOLE LEAKS IN RADIATOR CORE LEAKING ON FRONT OF ENGINE OR INTAKE MANIFOLD GASKET LEAKING COOLANT.
waterpump? No movement of water/coolant, engine overheats. Engine overheats, warp heads. Next time you rip a head off, check gasket to see if head gasket failed or if there is a different cause to car overheating.
Is it a 99 or an 03? Either way fairly simple. You will need to remove the splash shield on the passenger side wheel well. Removing tire is optional. If it is a 99, the pump should be located near the radiator. Loosen the bolts that hold the pulley on the pump before removing the belt. This will save you time later. Remove the belt, then remove the pulley. Take all the bolts out of the waterpump. Install in reverse order. If it is an 03, it is near the firewall side of the motor. Remove shield, loosen pulley bolts. The pulley will not come off until you get the water pump out, but you need to remove the bolts for it any way. Take the bolts out of the waterpump. You will need a pry bar to get the pump/pulley out. You can pry on the tensioner against the fenderwell and wiggle it out. Install in reverse order.
Solenoid pack leaking, Cooler Lines to Radiator leaking, Timing cover leaking, They suggest changing the water pump at the same time as the lower rad hose, timing chain, and valve cover gaskets. This is because it either looks like the water pump will die soon, preventative measures, or the shop is trying to rip you off for an hours labor.
Either way, I would suggest taking it to a mechanic, unless you're a bit of a handy man.