Overheating

Tiny
KATHY BROWN
  • MEMBER
  • JEEP CHEROKEE
I have a jeep cherokee 2000, approx. 95,000 miles in june replace radiator thermostate and belts, recentley began overheating again, has made a piercing high pitch sound that last briefley when it is started. The repair shop is unsure if it is head gasket or water pump. Any ideas?
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Friday, November 23rd, 2007 AT 5:09 AM

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Tiny
RASMATAZ
  • MEMBER
Has made a piercing high pitch sound that last briefley when it is started. Could be a loose belt.

Have the tests below perform

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: Thermostat, Pressure test the Rad. Cap, Clogged radiator, Fan clutch, Radiator electrical fan, collaspe hoses, water pump.
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Friday, November 23rd, 2007 AT 6:08 AM
Tiny
BMRFIXIT
  • EXPERT
Did they check for a head gasket failure?
Is the fan coming on?
Are u loosing antifreeze?
It s very possible for head gasket to fail if you over heated the truck
Does a head gasket test?

Good luck
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Friday, November 23rd, 2007 AT 6:13 AM

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