If the pipe from stat to rad is getting warm that suggests the stat is opening and some water is flowing, but very little (or it's convection).

I'm still leaning toward pump failure.

RIGHTS GUYS

I HAVE GOT AN UPDATE.

I opened all pipes and thermostate,

the small pipe which goes in the coolant reservior, it was jamed because of mud. so i took the bottle off and cleaned it.

put everything back on and took all the air off.

drove for a bit, the coolant light came on, soo opened the small pipe which goes in reservioe, there was some air pressure, then opened the cap and filled more coolant in.

then i drove for a bit, all heaters were blowing proper hot air. BUT GOT AN OTHER PROBLEM NOW, the pipe which goes in thermostat and bottom hose of radiator, it was cold but the thermostate plastic case was hot though.

the other pipe which goes on the top hose of raidator to engine, it was hot.

Edited by bmw messed up on 12/02/2013 at 15:01

what movements?

the pipe which goes in thermostate to bottom hose of radiator, it was cold and i can feel something inside like coolant moving i think.

rest of the pipes were all very warm.

is it possible if the thermostate didn't open?

but i had proper hot air from heaters inside the car

Edited by bmw messed up on 12/02/2013 at 15:49

yeah bro hope thats right lol

i went to a garage before, he goes either thermostate or water pump gone so i came here and did some research.

i write it down so if anyone ever has the same problem, atlest he will know what he need to do to fix it before taking it to a garage.

1) i checked everything like no leak at all

2)i open the thermostate, put in a hot bowl which was on fire, the thermostate start getting open and then i put in a cold water, it close itself so thats mean, thermostat is fine.

3) the pipe which goes to the bottom of radiator from thermostat, i put water in that, and opened the tap in the bottom of radiator so the water flows thats mean, there was no blocking on the upper hose.

4) the pipe which goes from engine to upper hose of radiator, i put water in that too, the water flows from the tap so there was no blockages as well.

5) the pipe which goes into the reservior, its very small pipe, i took it off, it was full of mud and blocked, so i might as thought, i clean the bottle too. so i took it off, and cleaned it with hot water. there was so much mud in there.

6) now put everything back together and start filling the coolant, i left the small pipe which goes in reservioe, also called bleed pipe.

7) now there was two pipe, 1 pipe which connects to thermostat and bottom hose of radiator, 2 pip which connects to engine and upper hose of radiator, when added the coolant, squeeze those pips and see the level in the reservior, if its goes up and down, thats mean there is no blockage in the cooling system

8) close the cap and start the engine and rev is on 2000 rpm till water start coming out from the small bleed pipe. if see a water, close it ASAP.

9) now there is an other small pipe which on the top of the big pipe which connects to engine and upper hose radiator, open the pipe and see if water flows.

10) if there was water flowing, then i guess your water pump is fine.

11) water pump would be the last option. do all those step first, actually i did it twice though. car is fine for now, i will take mine for a proper bad drive today to see if its heat up or not. i will pot the updates.

yeah i will certainly do that

i drove my car for like 30 miles but in the end it heats up but this time, heaters were blowing warm air, not hot air.

the temperature needle goes back to 90 degree if i slow down but if i rev hard, it increase.

the pipe which connects to radiator and thermostate, was cold.

other pipes were hot and other thing i noticed, my car was 100 degree but radiator fans were off, but asap i turn off the engine, both fans start working to cool the engine i guess.

but should fans be working when if my car was over heat like when i was driving or idle??????

i turned AC on, both fans start working then.

other question i want to ask, can i drive with out thermostat? what advantage and disadvantages will it cause?

I dont think you read my whole conversation but anyway i am not driving the car, i am trying fix it and trying to find out the problem of over heating.

anyway guys, when i drive slow like under 40mph and 5th gear, car don't over heat and heaters are blowing little warm air as well.

I am thinking the water pump is working but not proper, like getting weak or somthing. but please do tell me about the radiator fans, when temperature goes 110 degree still my fans not working but asap i turn off then engine, both radiators fans start working for 2 mins. then cut off itself.

"anyway guys, when i drive slow like under 40mph and 5th gear, car don't over heat and heaters are blowing little warm air as well."

Sounds very much like you are driving it to me.

If you drive it at under 40 and it does not overheat or loose any coolant then the radiator itself could be blocked but you should still have a hot heater which makes me think that the HG has gone.

Edited by Collos25 on 14/02/2013 at 13:14

how radiator be blocked? when water is coming back to reservior and plus i open the top hose and put water in in the pipe and it flows out from the bottom tap of radiator.

then i put water in the put water in the pipe which goes to bottom of radiator, waters flow out from the bottom tap.

thats mean radiator is not blocked.

Doesn´t prove anything its the rate the water and the volume of water that will pass through the radiator in a given time.It can half the core blocked you will still get water passing through.

Your HG test is flawed to say the least you can have water to oil,water to water ,and water to air, the latter will not show only use water and the heater wil run cold till all the water is used up.

the system is been bleeded so many times but m sure, there wasn't any air lock. as the water circulating from all pipes.

I bought a new thermostate for 11quid from BMS. before i put it in, i checked it in hot water so it works, ( open and close)

i am concern about the pipe which goes in radiator bottom hose and thermostat. i can feel proper coolant movement inside the pipe and its cold pipe.

the other pipe which goes in engine and upper hose of rad, was prety hot and also the small pipe which goes back to reservior was hot too.

i am so confused, what would be the problem as my heaters are warm when car is idle and when i drive, it goes soooo hottttt.. that i had turn it off even its minus outside.

thanks bruv

i will try that tomorrow and also got block test to check for head gasket like any gases in radiator.

a quick question, can a car over heat because of temperature sensor?

other questions, the pipe which goes in to thermostat from radiator, does it have to be cold?? when car is at normal temperature, i can feel the coolant inside but other pipe which goes from engine, i cant feel the proper movement of coolant..

so does it have to be like that?