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No not necessory but u must have it tested for leaks and make sure it is not clogged internally or externally so u have good flow of coolent inside and no restrictions to air flow , if cooling system is corrosion free inside of radiator should be ok.
If you keep topping it up it is still leaking and if there is no external leak then you probably have a blown head gasket with water leaking into the cylinders. You need pressure checks on the radiator and engine to find out where it is bad.
Check your oil level and see if the oil on the dip stick is white and foamy or clean and just dirty oily. If it is white and foamy it has water mixed with it (emulsified) and you have a leak between the water and oil galleries. (Normally a head gasket)
If the car will let you see the coolant, top the radiator up with the engine cold and leave the cap off so you can see the water flowing round. Run the engine until you see the water flowing round when the engine thermostat opens. If you get air bubbles in the radiator coolant your head gasket has gone. If you get a sudden burst of air through the coolant, again, the head gasket has gone.
It will NOT get better by itself and could be an expensive repair - new car time? Sorry.
check your engine oil for water and water for oil your head gasket may have blown. failing that the water pump has gone and not pumping the water round. with engine running you should feel the water round if you squeeze the pipe near to the thermostat.
Hi it sounds your head gasket need's replaced ,,,As for the water creamy white that means that oil is getting in to your water .
The head gasket has gone water can get into oil
but it also oil can get into water can also
water can be lost down the exhaust.
Replace head gasket clean out radiator
And did you change the radiator because of an engine overheating problem? If that's the case, and you got everything connected back up right, I'm afraid you may have serious engine damage, a blown head gasket at least, and possibly further damage. Have it checked by a shop. Good luck.
check radiator is not blocked, check air can pass through radiator (fins not blocked with debris) check that there is no airlock in system. is header tank being pressurised when engine running ( remove cap and start engine, look for bubbles in header tank). If bubbles then you need to check head gasket or even crack in head or cylinder walls. Presume you fitted the thermostat in the right way round. if you have boiled the engine since fitting the thermostat you will probably need to remove it (maybe see if it boils without it fitted) and possibly replace it again. (drop in hot water and see if it opens, if it doesn't then replace it)
replace thermostat as if its not working it is not letting cooled water from radiator to curculate engine. if not done it could do damage ie head gasket, warp head
You have blown another head gasket. Oil won't get into the coolant, or coolant into the oil, but after the engine warms up exhaust gas will force it's way into the water jacket and stop coolant from flowing through. The best part is that it will be intermittent for a while, which makes it hard to find, but it will get progressively worse. Hopefully, it will be the same gasket the dealer has already replaced, which will help you convince them to warranty the job. You might want to make sure they had the head machined before putting it all back together.
Good luck!
leave the radiator cap off till it reaches operating temperture,check for bubbles in coolant,if you have bubbles [bad head gasket] or check for the coolant curculating,if not curculating [stuck closed thermasat or plugged radiator
If the head gasket is starting to go, the the water gets vapourized inside the engine. The water level will go down, sometimes you get white smoke from the exhaust, the car consumes more fuel and has less compression and performances.
If you are lucky, and you check the water you can drive a car with bad head gasket for many miles, before it blows completely and leave you on the middle of a motorway.
If the head gasket is starting to go better to fix it or to replace the car.
The part costs only thirty pounds or so here in UK, but the job is expensive, as you need to take apart the head. Here in UK you dont pay less than four hundreds pounds, probably a bit more, depending on the garage.
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