Is it the water pump???

some bolts go thru the water jacket,could be you need to add cilcone to the ends of the bolts.

im sorry to tell you,but pulleys on water-pumps do not get RE-PLACED! if they're LEAKING from th weeping HOLE,which is too the side of the pulley, then that means the RUBBER-SEAL went out, which is behind th pulley,on the inside, this indicates that its time for a BRAND-NEW-WATER-PUMP...

that is the distributor behind the waterpump, water pump will come off with \out removing crankshaft pulley, i own a 95 Z28 Lt 1 350, reply to [email protected]

depending on the motor i am sure your water pump will be behind your timing belt which is at the front of the motor behind the plastic cover panels. what engine do you have in it?

Well there are only 3 things that could have gone wrong.

1. Radiator Leak - this means the radiator has developed a hole with via corrosion of the metal parts of simply integrity failure of the plastic parts of the radiator.
2. Hose leak - this could be a hole in 1 of 2 hoses that connects the engine to the radiator. Or it can also be a leak where the hose connects to the radiator (clamp Failure).
3. Water Pump breakdown - this is where the gasket in the water pump has failed and is leaking out the water rather than pumping it.

All the problems above has different ways of diagnosing. but we can probably narrow it down.

1. if the leak is near the radiator then it could be a hose connection, hose breakage or Radiator hole.

2. if the leak is nearer the engine then check the other end of the hose and if its not there then it could only be the water pump is leaking. You can check this if there are water stains on the water pump. The water pump on a 1990 corolla is mechanical turned also by a fan belt. Look for a pulley that has a hose connected to the radiator and that would be the water pump.

Starting from the top down dab every joint and seam with kitchen paper towel. Between each dab and press examine the kitchen towel for dampness. It is vital that you find out exactly where the leak is coming from. You could be lucky and the leak might be fixed buy an extra half turn on a jubilee connector on a hose union or a quarter turn on the water pump or thermostat housing bolts. If the leak persists you may require a new gasket . If the leak is from the water pump shaft seal behind pulley you will see a tell tale stain on the 'chin' of the pump body. This will require a replacement of the pump.

relay should be inside the hood next to engine there is a fuse box cover stated what relay are uses.

Is your radiator fan coming on?

Try checking all the way around the head gasket.