We have done the radiator new top tank flush a new cap an a new thermostatic . We can run it to warm up for half hour its ok temperture normal on half. Then you take it for a drive its normal you could about 6km an then the temperture shoots up to the red then drops back to normal like straight away so i pull over to see if it boiling an stream but nothing its normal. I get hm an its run sweet no streaming or boiling over. But in after its cool down you have to put about half litre of water an the over bottle is normal. So can you help. I real donot what to think of the worse.
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Re: honda crv 1995 heading
What you need to do is to check where the leak is coming from. If you have to add water after it's run, then i suggest maybe putting a cardboard under the engine after driving to trace if there are any leaks. Also check the coolant/water level when the engine is running at normal operating temperature, both the radiator and the reservior. But please be carefull when you do this due to pressure, specially when checking a radiator in the condition the cooling system is in. And last i would suggest putting distilled water rather than regular tap water. The water from the tap is hard water so it will have the tendency to evaporate a lot more quickly than soft water. Hope you fix it.
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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.
Absolutely no idea but the brown sludge residue is caused by the fact that it has been run with no antifreeze causing internal corrosion of the engine ,,now the radiator that you obviously bought second hand could be the problem ,drain cooling system and flush then add some caustic soda about half a cup and add to a cold radiator then top up with water and run engine for about half hour then flush again in all directions using the heater pipes ,refill with water and try it and if its ok add the 50% antifreeze if its not ok then its a head gasket new thermostat and possibly a NEW radiator
Your thermostat may be staying closed, if the top coolant hose becomes hot after the engine running for a while, then thermostat is opening ok. Next check to see if the bottom hose going to the rad is getting warm. If its staying cold then you may have a problem with the water pump not circulating the water around the cooling system. If thats ok check the rad cap is sealing ok. when the engine gets up to normal engine temperture remove the reservoir top filling cap which has a rubber pipe going to the thermostat housing. with the engine running there should be no water coming down the pipe and exiting the filler cap. If there is it could be the rad cap not holding pressure which it would need to be replaced or the head gasket is leaking and pressurising the coolant system.. hope this helps you..
Ok ~ Things to check are (simplest first) 1. Examine radiator cap for damaged or leaking seals. (Have it tested at your radiator place. 2. Check for water leaks. At the radiator, rubber hoses including heater hoses. Also cabin heater radiator core. 3. Top up radiator and run engine without the cap fitted. Blip the throttle and see if any bubles or traces of gas appear when you look in the top tank. During this test, check that the top tanks turns "hot" as the thermostat opens. If not, remove and test/replace thermostat. 4. Have a "cylinder leakage test" done at your repair shop. 5. Have the cooling system pressure tested. 6. Add coooling system ceaner to the system and drive for about 30mins. Next, reverse flush radiator and engine block.
This list is in the order you need to procede, and next step should be performed only after the the preceding step tested ok.
Build up in the coolant system a faulty Sensor reporting that the engine is hot when it is not. You can try running a coolant flush through the system to remove that possible problem. If you are basing this overheating problem on coolant being forced out the over flow, do a compression check on the cylinders. If one or more of the cylinders is running extremely high compression you may have a faulty head gasket, cracked head or cracked block.
take fan belt off so water pump does not turn. take thermostat housing off. make sure water level is close to top of thermostat housing (inside) start it, look for air bubbles... If you get them it is due to leaking headgasket, this will be the cause of your overheating and I suspect it's pushing water out too... Just a guess with the limited details.
I had the same problem with my 1993 Liberty LX. Remove the thermostat (located inside bottom radiator hose engine connection - take the connection off and thermostat is inside). Reassemble (minus thermostat), reconnect bottom hose. Slowly (very, very slowly) refill the radiator and remove the bleed plug ( located beside the top hose connection to the radiator - a black square plug with a phillips head cross in the middle). When the radiator is full and clear water (no air bubbles) is coming out of the bleed point, replace the bleed plug and then the radiator cap.
Run the engine for five minutes (approx) or until normal engine temperature is reached. Allow the engine to cool down and recheck the water level - fill if necessary ensuring that the bleed plug is open and clear water is coming out of that point. Replace Bleed plug and then radiator cap. Run engine for five minutes (approx) and then test dive. If the engine overheats keep filling the radiator until there are no air bubbles coming from out of the bleed point.
This fixed my overheating problem. Good luck and safe motoring.
First check for the rad fan working. It could be the Fan relay, bad ground connection or coolant temp sensor (commands the fan relay). If not, check for little tiny bubbles in the coolant. Do this by running the vehicle with the rad cap off. Make sure there is no pressure in the cooling system first or you will get burned (squeeze rad hose, should be cool and easy to squeeze). Look into the top of the rad and watch for these tiny little bubbles. If they are present, you will need a head gasket.