1998 Isuzu Rodeo Question Over heating and no heat, with rou

Tiny
TATDADDY614
  • MEMBER
  • 1998 ISUZU RODEO
  • 4 CYL
  • 2WD
  • MANUAL
  • 134,000 MILES
I bought this 98 Rodeo, 5 speed, 4 cylinder. I was told that it is losing water, and that it might be a head gasket. I was also told from another person that it could be that or a cracked head. I decided to search my self, and what I found is this: it idles rough, but when driving it is fine, both upper and lower hoses get hot after awhile, there is no smoke from exhaust of any kind, there is no heat from the heater. I can hear the fluid boiling, but no leaks. The temp gauge goes all the way up, but when I hit a good pothole or bump, it jumps down to normal, then goes back up to the hot end. I am assuming it is not a gasket or cracked head, but a water pump instead. But not being a mechanic, I am not sure.
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Monday, November 16th, 2009 AT 2:41 PM

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Tiny
RASMATAZ
  • MEMBER
Hi tatdaddy614 and TY for the donation

Check coolant level if okay replace the thermostat then report back with some results
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Monday, November 16th, 2009 AT 5:40 PM
Tiny
TATDADDY614
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Ok, replaced thermostat, and regained a little heat in the truck, but it began to over heat again, just not as fast, I got into the engine compartment, and noticed all the hoses seemed to be pressurized, I gave them all a little sqeeze, and when I got to this piping on the passenger side of the engine, a small hose leading up to the intake, broke off from the piping and hot fluid sprayed everywhere, including my face, luckily it wasnt bad, and I just got a few burns, nothing too serious. So now I am even more stumped. And I dont know what that pipe is? The lower hose connects to it, and then it connects to the heater core hoses, and goes to several small hoses. SO now that needs replaced as well as whatever else in wrong.
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Tuesday, November 17th, 2009 AT 10:20 AM
Tiny
RASMATAZ
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Test the water pump if okay check the radiator if its clogged-up and also could be airlock in the system. Continues to overheat get it block and pressure tested.

Water pump test:

One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad. The other cause might be a bad thermostat that is not opening properly (remove and inspect the thermostat), or a clogged radiator.
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Tuesday, November 17th, 2009 AT 1:26 PM
Tiny
TATDADDY614
  • MEMBER
Ok, did that, everything looked good. I checked the oil dipstick, no water or coolant, but when removing the oil fill cap, it is cloudy in the top end, looks like coolant. Cracked head or head gasket?
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Tuesday, November 17th, 2009 AT 3:14 PM
Tiny
RASMATAZ
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Continues to overheat get it block and pressure tested to check for blown headgasket, cracked head or block
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Tuesday, November 17th, 2009 AT 11:53 PM

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