1999 Chevrolet Cavalier is overheating

Tiny
PANCHITA
  • MEMBER
  • 1999 CHEVROLET CAVALIER
The coolant actually disappears in 5 minutes because after driving the car for a few minutes, the coolant starts overflowing and then the car overheats. They have changed thermostat, sensor, but they cannot find the reason as to why it overheats and the coolant overflows.
Thursday, October 11th, 2007 AT 1:40 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following: Pressure test the Rad. Cap, Clogged radiator, Fan clutch, Radiator electrical fan, collaspe hoses, water pump.
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Thursday, October 11th, 2007 AT 6:18 PM

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