1996 Toyota Pickup cooling problem

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1996 Toyota Pickup 4 cyl Four Wheel Drive Manual 158, 00 miles

This year my truck started over heating.A mechanic stated that he'd just replace my radiator. So, I took it upon myself to do so. And replaced my thermostat as well. I still am having over-heating problems. What else could it be? I'm not a mechanic and have no idea where to go from here.
Please help with any info you may have.

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Wednesday, February 6th, 2008 AT 11:39 AM

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Try bleeding the cooling system

Always bleed air from cooling system after replacing coolant. Set heater for maximum heat. Remove radiator cap. Loosen drain plug and remove drain bolt (if equipped) from engine block. Drain coolant reservoir. Fill coolant reservoir to MAX mark with 50/50 water-coolant mixture. Loosen bleed bolt and fill radiator up to base of filler neck. Close bleed bolt when coolant flows out without bubbles. Tighten bleed bolt. With radiator cap removed, start and operate engine to normal operating temperature. Add coolant if necessary and check for leaks.

Bleeding don't work get it block and pressure tested.

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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Wednesday, February 6th, 2008 AT 12:18 PM

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