Over heating

I have a 1998 Honda Accord. It has 204,600 miles with a v6 engine.I have changed the thermostat and it still over heats so I took it out and still same thing over heats.I have flushed the radiator out with a hose after buying a flush kit that diden't work.I don't know what else to do it is still over heating. WHat should I try or do next. Please Help.
Thank you, Heather
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Wednesday, November 14th, 2007 AT 2:08 PM

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Before you start the vehicle remove the radiator cap-now start it-look inside the radiator is the coolant squirling around-now have someone raise the engine speed did the squirling increase, if so pinch the upper hose for a few secs and let go did the flow increases if so the water pump is okay

Do you see white smoke on back? If not try bleeding the air out of the system see below

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.

If bleeding don't work have the following tests below

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, November 14th, 2007 AT 2:21 PM

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