Heres what happened.. some body didn't put the cap on the radiator properly and yes the car really over heated... it was driven a couple of kilometres back home and now there is a real bad tapping noise coming from the top of the motor, I have a suspicion that the seals on one or more of the tappets (lifters) has been damaged (basicly cooked) or the worse case is that the aluminium head has been warped. The Head gasket seems to be okay, no water in the sump & water vapour spewing out the exhaust its summer in Australia at the moment
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Re: A real Bad tapping noise
Yeah it is your heads if there is water vapor coming out your heads are gone out not the gasket but the heads themselves and it is a very long process to replace them unfortunately as for the noise this is actually a seperate related issue due to the over heating the lifters are probably stuck also since it got really hot the oil most likely has broken down so I would also change the oil is there water in the oil ?
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You need to drain the radiator and refill it making sure when you refill it to be sure to put the anti-freeze back in real slow.Then start the car with the radiator cap off and let the car warm up to operating temp. you may have to add some fluid when the thermostat opens. If that don't work the only thing you can do is start the car after removing the radiator cap and stand back while the air is expelled be sure to stay out of the way and not get burnt by the hot fluid. During this time you will need to add fluid to the radiator so as not to over heat the engine. I don't really recommend this process unless you know exactly what you are doing.
It is a BAD idea to run a car without a thermostat. A thermostat brings the car up to operating temp in a certain range. If the engine never gets warm, the rings never seat against the cylinder walls and the car will run very badly. If any radiator hose collapses while running the car, the vent on the radiator cap is plugged up. Replace the Radiator cap and the thermostat and if needed have the radiator cleaned out and use a proper mix of anti-freeze Isuzu recommends.
Use some large jawed pliers, like channel-lock pliers, on the side of the cap turning it counter-clockwise, while pressing down real hard on the cap. Normally, you have to press down, sometimes really hard, and turn the cap back by hand. If it\'s tighter than that, it\'s okay to put a pair of pliers on it and force it off. You will want a new radiator cap anyway.
do they go bad, that part is easy, entropy happens , throughout the universe. cars, x10000 (a mechanic is born, for this task)
my guess, is the car is boiling over, right? post all symptoms and what size engine.
if boiling over. try a new cap, on the radiator. the overflow tank is for normal AF coolant expansion. and the reverse actions. cooling and contraction.
over heating has only 2 causes, in the macro. engine makes too much heat. cooling system failures. the mechanic has tools and tests that find out which one it is. if not a hand on person, take it to any ASE rated shop.
yes you can leave the thermostat out your engine will take longer to warm up ,be careful with that stop leak stuff, as well as stopping leak can be inclined to block radiator maybe there is something else causing it to overheat ?
Wow. It could be a multitude of different problems. I will tell you a few things to look at first. Possible reasons of over heating include low water, thermostat stuck closed, no thermostat installed, radiator stopped up inside with gunk or outside with bugs, missing lower air dam, fan not running either because of a sensor or a bad fan motor, blown head gasket, cracked head, cracked block. I put these in order of simple to hard and mostly low price to high price. You didn't say anything about noises but the accessory belt tensioner could be broken and causing the belt to not turn the waterpump sufficiently but you would probably hear the power steering pump growl if that was the problem. Hope this helps.
heat rises can be a number of things,, is anything blocking the air flow through the radiator, are the cells in the radiator blocked or clogged,, look in through the cap refill for the radiator and see if its rusty if so flush the radiator, is the thermostat the recommended heat range for the motor? Is the fan working correctly,, any of these could cause your problem, once it reaches the correct heat range is the thermostat opening and the temp0 drops,, and here's one that I have to add , but no reflection on your repair abilities, But I've done it ,, so I know it happens,, is the thermostat put in the right direction, make sure the spring section is towards the motor
This is where you fluid goes. If I were you, I would stay away from those sealants. But yes you can put the sealant in the reserve, but it;s best if you drain half the water out, pour in coolant and then re-fill. This gives it a better chance to flow throughout the system. Sometimes these sealants can cause more harm than good in the long run.