Question about 2002 Kia Sedona

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Waterleak nopressure in hose loud knocking at top of engin

It over heated so checked water it empty so filled up an realised leak near back of car then started an a large knocking sound from top of engin please help

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  • graham white Oct 01, 2009

    its not leakin into engin the water is leakin from a pipe it sounds like somthing coming up an hiting top of engin

  • graham white Oct 02, 2009

    the head is blown if water is in cylinder will that make it thump at top center of engin an would it be possible for me to fix it as have a bit of nollage about cars also theres heal a seal from america recons it fixes it useing the heat from cylinders just pore it in have u any more advice as no warenty skint no job an 5 kids dont know what to do i do have £500 repair cover with AA but void due to the water pipe was corrosion which caused it please help

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That doesn't sound good. It appears you have 1 of 2 issues. The no coolant is a bad/blown head gasket or cracked engine block. When the head gasket is bad or block is cracked the coolant leaks into the cylinder blows out the exhaust (have you noticed the smell of coolant or white smoke in the exhaust) then runs by the pistons and into the oil pan (check your oil level it is probably way high) where it mixes with your oil and reduces its viscosity/lubrication. After prolonged driving with coolant/water in the motor your bearing will wear prematurly and cause parts to become looser then they are (hense the knocking sound). If you continue driving with the knock the motor will have a mechanical breakdown and more then likely throw a rod. THis is usually a motor swap at this point. Some mechanics will replace the bearings but either or you will nee extensive work to correct. The head gaskets need to be replaced/checked and the head for warpage/seepage and possibly a cracked block plus fixing the damage to the lower end. Its usually cheaper to purchase a new/used motor as this is somehting that will cost $1000's of dollars so please pick a reputable mechanic for this kind of work... If you have an extended warranty this is the time to use it..

Posted on Oct 01, 2009

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  • James Brooks
    James Brooks Oct 01, 2009

    You may wanna confirm that as the water could still be leaking where it shouldn't . When did the sound start? It could still what I described, you need to run the motor and put your ear all around it to pinpoint the sound (even get under the vehicle and see if its louder on top or bottom). If it sounds like a metal rattling it could be your valves (bad timing, valve guides/clearance). It needs immediate attention. You need to find the water leak and repair it to avoid an overheating motor which can also cause internal engine damage and extended wear..

  • James Brooks
    James Brooks Oct 02, 2009

    You could fix it yourself but its a little more then heal a seal. The damage is already done and major repair is needed. Even if it sealed the head gasked leak (which there no way to confirm unless you drive it and check later but risk doing even more damage) you still have the damage already done which needs to be repaired. You can do it yourself but this is a little about beginner mechanical knowlegde. It requires a little more engine, electrical/mechical know how as if you pull something off and put it back incorrectly it will not only not work properly but may damage someting else..

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As you have tried topping up, I would suggest WHEN the engine is cold you open the water cap that is on the engine block near the back left hand side, DO NOT OPEN WHEN HOT (it probably says that on the cap) try filling the system here, because this is a place where the system can airlock which could be your problem, it might take a bit to fill it because it will go down if your pipes are empty, (you cant circulate air with a water pump) squeeze the pipes at the same time, this needs to be full to the top, while you have this open you can start the engine and watch to see if there is any circulation, top up again if needed, watch your header bottle level. if the water is circulating then it should heat up ok. When full put the cap back on quickly and make sure you have water in your header bottle. if it doesn't heat up after this, then it is quite possibly your water pump, although if the engine is not overheating then I doubt that it is this. Other than that I would be checking for blocked heater pipes or radiator. You haven't said if you are losing water or not, but if you are then I would be checking the pipework that runs from the bulkhead all the way to the rear heater as they rot. I hope I have helped you a little.

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note if water pump was replaced due to leaking and engine was overheated at that time then it may be a good idea to replace the thermostat .
after filling is done start engine and allow it to run. watch temperature if temp start to climb past half way shut engine down and let sit for 5min. then restart and check level, in res do not open cap . feel air from fan and see if it is getting hot, this may take up to a half hour but do not drive,

A few questions, does this jeep have an electric fan?
when you heard the knocking was engine temp hot?
If you start jeep cold does engine knock?
Did this jeep get a new thermostat with waterpump job?
did it overheat when pump went bad and why did water pump get replaced?

sorry for all the questions ,just trying to get all the info to help you .

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