Peugeot 306 1.4 overheating problem, heater not getting warm, engine is running ok, radiator not getting warm, water coming from overflow pipe on rad/expansion tank, all hoses connected to engine getting warm, no water from heater bleed niple. water pump? head gasket? which one?

Do not continue to operate. Operating an overheated engine will cause the engine to fail.

After the engine has cooled,
Confirm that the engine has coolant.
Confirm that the reservoir is full to the mark
Start engine and confirm as engine gets warm cooling fan at radiator turns on

Confirm that the rubber engine belt is working
Put in car heater to full hot and blower on.
Confirm heat is hot from car heater.
If heater is not hot possible water pump failure or air in coolant system keeping the coolant from circulating.
Allow to cool completely.
Remove cap start engine and observe coolant flowing at or near cap. Observe bubbling or exhaust gases coming from radiator

Check for water in oil by pulling dip stick

• White smoke from the exhaust pipe
• Overheating engine
• Bubbles in the radiator or coolant overflow tank
• White milky oil
• Significant loss of coolant with no visible leaks

If milky likely a blown head gasket

Hope this helps?

When cold fill the radiator with water and leave the cap off. Make sure that you have all the air out.
Start the car and watch the radiator, you are looking for air bubbles coming out of the radiator. If you have a steady stream of bubbles appearing you have a blown head gasket.

It would appear your thermostat is stuck in the closed position , find where it is on your engine, drain coolant and remove thermostat housing and stat, replace housing(liquid gasket OK) and coolant. now run engine, turn heater controls to hot leaving filler cap off, top up any water to max and replace cap now warm up to temp until fan comes on. if all ok replace thermostat with a new one and new gasket, you could also flush the sytem out at the same time with a hose pipe by loosening one of coolent pipes and flush radiator.

Fill the rad or overflow bottle right to the top and run the engine with no cap on,if you see a constant flow of bubbles your head gasket is leaking or you have a crack somewhere in the cooling system.

disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

i had something similar once, it ended up being the intake radiator hose, it has a metal coil inside, mine was broken and when you revved the motor it would **** the hose shut and overheat, but under 2000 rpm it was fine .

when replacing coolant, did you bleed the air from system! you can remove radiator or overflow cap when cold. start vehicle and let it run until thermostat opens,when all air is out hoses should get hot. but before starting, turn heater on to high setting, if you vehicle does not have a air bleeder on it. do as above. just be sure radiator is full of coolant. after hoses get hot, turn off heater, then put cap back on radiator or overflow. good-day! the first thing to do is to check for a stuck closed thermostat. do this first ok!

It could be the fan temp. switch but it shouldn't have been boiling in the overflow tank. I'd recommend doing a compression test to see if you have a blown head gasket. If it's a blown head gasket, the compressed air/fuel mix being force into the cooling system could well look like boiling in the over flow tank.

Could be a faulty water pump, clogged or stuck Thermostat or clogged radiator. Once the engine cools down remove the radiator cap then start the engine and wait for it to warm up to operating temperature. At operating temp you should be able to see the fluid in the radiator circulate. If you don't then you need to let the engine cool again and remove the thermostat or replace it. And run the same test again. If you still don't see the fluid circulate then replace the water pump.

The year of the vehicle, rusty liquid, and overheating, says your radiator could use a replacement. If it was your water pump, you would have liquid coming out of the water pump itself.