I have a Saturn SC1 and the engine sounds like a tractor when it is warm, when it is cool it sound normal, what do you think is going on, do you think it is the hyd- lifters?

CHANGE FUEL FILTER,COULD BE FUEL PUMP,FUEL PRESSURE SHOULD BE 31 - 36 PSI ENGINE VIN 7 AND 26 - 31 PSI ENGINE VIN 8

Honestly those engines are a dime a dozen, my local pick apart has a bunch of them-my 99 saturn has 180,000 miles on it and it uses oil (they all do, it seems)-change your oil, religiously, and if it doesn't leak, use synthetic-you can use 10w-30 instead of 5w-30, and make sure you use a good oil filter, like a Puralator PureOne or a K&N, Bosch-one with an anti-drainback valve. If it runs well, you should get lots more miles out of it, a good rebuild will cost upwards of $1700 but you can get a good used engine for as little as $200 if you look around. Just don't let it run low on oil, the rings are a bad design and cause binding which causes oil consumption, and eventual wear and failure.

check the connection to the starter located at the back of the engine (you have to get at it underneath), mine does the same thing i cleaned the connections and put some lube on the starter gear and it works like a charm now

car over heats at idle when i turn on ac it cools down. checked relay fine,fuse is fine.help!

Sounds like a case of a bad radiator elec. cooling fan motor, fan should come on with a/c on, if it don't, check fuses, if fuse ok, check for voltage at cooling fan motor, if you do have voltage, replace elec. cooling fan motor.

Check to make sure that one of the pulleys are not sticking on your serpentine belt line, or better known as the belt drive. Such as an alternator that is that seizing up, or a bad power steering pump.

CLOGGED FUEL INJECTORS IS CAUSING ENGINE TO FLOOD.THE INJECTORS IS LEAKING WITH ENGINE OFF.TRY CLEANING FUEL INJECTORS FILL GAS TANK UP.PUT A BOTTLE OF INJECTOR CLEANER IN FUEL TANK.DRIVE AROUND SO THE INJECTOR WILL CLEAN OUT THE INJECTORS.CHANGE AIR FILTER OR FUEL FILTER.THEY ARE DUE AT 30000 MILES .ALSO SCAN IT TO CHECK ECT AND IAT SENSORS THEY CAUSE STARTING PROBLEMS.

The ects in located on the drivers side up towards the top and into the side of the block has a small 2 wire plug,make sure when you buy this that you tell them sensor and not switch as they look the same,do this with the engine cool,remove the coolant tank cap to relieve pressure and coolant loss will be very small.

check your spark plug wires.