Ive changed thermostat, water pump, radiator, and fan. What else could be wrong with it?
2006-10-14 12:07:53 · 16 answers · asked by D'zignz of Kaos 3 in Cars & Transportation ➔ Maintenance & Repairs
You can check for blown headgsket by simply removing the radiator cap off (engine cold) then letting the engine idle, if it continueously "blows bubbles" you are having compression leaking into the water jacket, - which in turn will build up enough pressure (at road speeds) to blow out all the water and make engine overheat! It may bubble a little bit for two or three minutes as it heats up, but by the it should (maybe) blow a single bubble every minute or so, - (which is just expansion of water as the engine gets "hot").
Should the leak be small enough (at slower speeds), it will purge the air and fill up the water jacket again, - causing the engine to run at a normal temperature again! This small leak may be sealable with a product called "aluma-seal" (made by solder seal people), it will not hurt the engine, and may stop the leak, just warm engine up with the cap off, put in aluma-seal, and put cap back on,- then drive normally (5 miles or better the first time), this will mix the stuff in with water, and it will go around, - and around till it eventeually stops the leak. Note that this will not hurt the heater, (some stop leak compounds do).. Just use only one treatment, as half a dozen may pulg things up all over the place!
Also I have seen instances where the lower radiator hose has collapsed, (note most cars have a "spring" inside to hold them open). The internal spring may have rusted out, or "sub-standard hose put on at some time in the past, - (as they get older they get softer), and so may not have collapsed till now!
2006-10-14 15:14:19 · answer #1 · answered by guess78624 6 · 1⤊ 0⤋
If the radiator hoses are old and soft they may collapse under the flow of water through them and restrict flow through the system, or they may have ragged insides which do the same.
If there is an electric fan make sure that it is running under all conditions. Some have two or three speeds and one of the speeds may not be working. If it's not working at all check the fuses and the fan ballast resistor.
Get some cooling system cleaner from the parts store and use it according to instructions. Make sure it's compatible with alloy engines or heads if you have an alloy engine or head. Run it twice for best results.
Blocked exhaust system is the next step. The catalytic convertor and/or the mufflers or silencer could be carboned up or rusty inside and collapsed.
Over heating can ruin a thermostat. Most have wax balls inside them which expand when they melt and push the thermostat valve open. If the system gets hot the wax can flow out which ruins even a new thermostat. But this is fairly unlikely.
Is there anything that is restricting th flow of air to the raiator or from the engine compartment out?
If an engine is well out of tune, this can tip a marginal cooling system into overheating. Check the timing for a start.
How good is the transmission? Is the engine laboring to turn over a faulty slushbox? Are the brakes dragging? Are the tyres up to pressure?
Is your temperature gauge telling you lies?
2006-10-14 13:45:05 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Could be the same thing as is wrong with our car - the head gasket is broken, blown or cracked. This is a fixable problem but if the car is only worth a few hundred dollars the fix is not worth it - it is about 2 - 4 thousand dollars.
2006-10-14 12:18:35 · answer #3 · answered by mom of girls 6 · 1⤊ 0⤋
You haven't said what you are working with. Could be that the radiator needs cleaning out. Or you may have mechanical issues such as a blown head gasket.
2006-10-14 12:11:07 · answer #4 · answered by mad_mav70 6 · 1⤊ 1⤋
after changing all of that you should run cool ... but if not,check your timing...it could make the engine overheat.also make sure you have a shroud around your fan to direct the airflow through the radiator..
2006-10-14 12:15:52 · answer #5 · answered by d9hipi 1 · 1⤊ 0⤋
Maybe there's a blockage in the heater core. Does the heat work in your car? Did they replace the radiator with the proper size? If its a little small.....it'll overheat.
2006-10-14 12:13:25 · answer #6 · answered by UBuck30 2 · 0⤊ 2⤋
blockage in the hoses or low oil, head gasket, try no thermostat just to check flow sometimes you dont have to put it back in but watch the temp,
2006-10-14 12:20:43 · answer #7 · answered by mred 1 · 0⤊ 0⤋
A blown head gasket. Remove all the sparkplugs and crank over the engine, Look for water shooting out one or more of the sparkplug hole.
If it has a blown gasket you should see water.
2006-10-14 12:16:04 · answer #8 · answered by goldwing127959 6 · 0⤊ 1⤋
Recheck the coolant level at the radiator - NOT the expansion tank. Low coolant can cause the problem along with air trapped in the system..
2016-05-22 02:13:05 · answer #9 · answered by Karen 4 · 0⤊ 0⤋
Sounds to me like you have blown a head gasket. Better see a pro.
2006-10-14 12:13:24 · answer #10 · answered by ec1177 5 · 0⤊ 1⤋