2004 Infinity fx45 cranks but won't start after overheating problem (leaking radiator) fixed. Have checked all fuses, sensors and even changed brainbox but problem remains. Please help. Victor.

Chek the crank shaft sensor .

have u checked the water pump? the gasket could be bad! if that's not the problem check the thermostat. they also make a dye u can poor in the radiator called auto pro uv dye. you can get it at advanced auto parts store! use a black light and it'll show you where the leak is coming from! hope this helps!

check for your cam sensor or crank sensor .

You shouldn't have any gas smells, maybe a little if the engine were cranking over without starting. But your car is not even cranking, right? Or will it crank and not start? In that case you might smell a little gas, so next step would be to check for spark.

The leak on front passenger side: if that is where the front of the engine is, check carefully your water pump for leaking (then it is bad) and also check all hose connections there for leaks.

Sudden no-start conditions are usually loss of either spark or gas to the cylinders. These are the first things to check when it won't start.

COOLANT IN ENGINE OIL CRANK CASE SIGN OF BLOWED HEAD GASKET. HAVE COOLANT SYSTEM PRESSURE TEST FOR LEAKING HEAD GASKET.A GARAGE OR RADIATOR SHOP WILL PRESSURIZE COOLANT SYSTEM CHECK FOR BUBBLES IN RADIATOR AND CHECK FOR COOLANT DRIPPING IN OIL CRANK CASE.

REPLACE THE THERMOSTAT AND RADIATOR PRESSURE CAP.IF COOLANT LOW, ADD MORE COOLANT THROUGH COOLANT OVERFLOW UNTIL COOLANT LEVEL IN THE COOLANT OVERFLOW STAY AT FULL COLD MARK.REASON POUR COOLANT THROUGH COOLANT OVERFLOW MOST GM CARS DONT HAVE RADIATOR CAP.WHEN YOU GET COOLANT LEVEL OKAY, CRANK CAR LET IT IDLE UNTIL ENGINE GET HOT BUILD UP PRESSURE THEN TURN OFF CAR.CHECK FOR COOLANTS LEAKS AT THE RADIATOR HOSES,CHECK FOR LEAKS AT THE RADIATOR, CHECK FOR LEAKS AT WATER PUMP WEEP HOLE IF YOU SEE COOLANT LEAKING FROM WEEP HOLE REPLACE WATER PUMP. IF CAR OVERHEATING WHILE IDLING YOUR COOLING FANS NOT WORKING CHECK COOLING FANS FUSE AND RELAYS.IF FUSE AND RELAYS OKAY THE ENGINECOOLANT TEMPERATURE SENSOR BAD.

its best done with a scanner so you don't loose your radio settings etc. but you can disconnect your battery for 5 minutes and it will reset. also can go to auto zone or advance auto parts and they do it for free.

The engine oil 'warnig' light being ON indicates that you have a BAD problem with your engine oil system: this indicates that your engine is not being lubricated properly (due to low pressure) and you should get it checked immediately!
Oil warning light ON can be caused by:
- Low Engine Oil level
- Blocked oil filter
- Leaking oil filter
- Leaking oil seals
- Faulty oil pressure sensor (pretty rare) or loose sensor connector
- Also heck the obvious like loose Oil Filler cap and dip stick seal.
Hope it heps and do not drive your car without resolving this issue first as you could easily blow the engine!

There is a cooling fan switch normally located near the thermostat housing or in the head near the thermostat housing. check this and see if it is defective.

Check to see if your radiator fans are working. If you have A/C just turn it on and both fans WILL come on unless there is a problem ie: bad fuse(s), relay(s), or motor(s). I don't mean to scare you, but, someone "could" have a pretty bad head gasket leak and still not see fluid come out of the exhaust. If the fans are both working, it could be any number of things from, a faulty coolant temp sensor, a faulty dash gauge, possible air bubble in the cooling system. Another easy check is coolant consumption, if you are leaking coolant into the cylinder while engine is running and/or into the crank case. Just check to see if your coolant level is going down and/or your oil level isn't growing because of coolant filling up your crank case. Hope this info helps...(subytech)...