Question about 2000 kawasaki ZX-9 R Ninja

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1984 ninja, bought a week ago. overheats. took the inside out of the thermostat, pump looks good. radiator clear (i work at a radiator shop) engine runs smooth. cooling fan fed direct power and the engine climbs steady to red at idle. pulled the head. no obvious problem. is there anytthing i should have my eyes open for? are these bad for gasket failure? warped head? any help would be greatly appreciated.

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Is thier any odd smoke coming out the exhaust? if the smoke is whiteish that would be a head gasket.

Posted on Aug 01, 2009


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My 91 jeep wrangler has a good steady flow from the water pump and the other day the pipe that goes to the bottom radiator to the pump shot off and leaked out coolant everywere is it the pump it always...

If the pump isn't leaking or noisy, it's good. If the hose came off and the engine overheated you may have blown a head gasket (radiator hydrocarbon test is best to determine that) if you see steam from the tailpipe, coolant in the engine oil or oil in the coolant that also is a big clue.
Jeep engines tend to rust internally. the rust packs into the bottom of radiator core, especially after an overheat. Therefore, don't trust that because the radiator looks good that it is good you cannot see what's actually inside it. (you could try back-flushing but should do that with the radiator removed to do it right). If you see any improvement after flushing, replacement would be a good idea.(unless it completely works). You can use plain water in the cooling system while testing. Just don't leave the water overnight so it can freeze.

Feb 22, 2011 | Jeep Wrangler Cars & Trucks

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1984 dodge d150 overheating, changed water pump, thermostat, radiator.Lost, need Help???

pull the head off and have a look for corroded water ports in the head and failed gasket

Oct 05, 2010 | 1984 Dodge D150

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My exe's 98 blazer overheated on the way home last week, replaced thermostat on the side of the road, no help. She took it to a repair shop they told her they did a CO check of the coolant and she had a...

Assuming the following;
The head gaskets were replaced properly
The Water Pump was replaced properly
The Thermostat was replaced properly

There are only a few other things to check.
1) if you you remove one of the heater hoses from the engine bib during a cold filling from the radiator - it will release trapped air until you see the coolant coming out the motor side - this works great to ensure the air is out. Hook hose back up before running.(or you could leave the hose off for a second and start it to see if water gushes out - water pump check - kinda messy though)

Remember that heater water will circulate even with the thermostat is closed.

if that does not work, then you need to ensure the top hose going to the radiator warms up indicating the thermostat is opening and hot engine water is starting to dump into the radiator.

2) the radiator more than likely is clogged and needs cleaning by a radiator shop, or replacement if it is not one that can be cleaned.

Ask your son if he remembers looking into the water ports where he took off the old water pump, sometimes of the system is not flushed at proper intervals, it will sludge up the water jackets and keep water from circulating through the motor.

one last thing (gulp) That CO check is pretty accurate - and cheap. You might want to have it checked again - because the heads should have been inspected for cracks as well as pressure checked before putting them back on - especially since the motor overheated. That alone will crack the heads beyond repair - more so than not.

Let me know if you have any other questions.

Good Luck.

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1 Answer


Most people think of this is a common problem of the thermostat. To make sure it is not the only problem, run your car a day or two without the thermostat to make sure it is not overheating anymore, then put in a new thermostat. Your problem is solved.
However, if your engine still has overheat without the thermostat, then there is a problem with restriction of coolant circulation through the engine from 3 followings:
1- Radiator clogged up.
2- Water pump is bad.
3- Water jacket is clogged up.
A shop can easily determine if the water pum bad or not.
Make sure to find a reputation shop since a yo-yo shop can change your water pump first then later on determine the clogged up radiator is the culprit while you are not actually needing a water pump at the first place. Why, a good water pump still causes overheat since the radiator is clogging up. My advise is not to use a rebuilt radiator, go with a brand new one. It can last you 10 years instead of 2 years on the rebuilt one. Good luck.

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94 Jetta w/2.0 engine overheats.I took it to a mechanic and he said my thermostat was fine.So what else could be causing it to overheat??And it does have a small oil leak too but I can't pin point it.

Overheating could be anything in the cooling system. Thermostat is out, could be radiator, water pump, broken belts which cause the water pump to not move, cylinder head warped, cracked, or the cylinder head gasket.

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My BroncoII overheats. I removed the thermostat but nothing changed. What is the cause of this problem?

Are you getting good pumping action from your water pump? You can remove the radiator cap (cold only, please) and visually see some pumping action... or not.
Next question, is the fan to the radiator working?
If all this is good, it's possible the radiator is clogged-up and restricting coolant flow.
Hope this helps you. Good luck!

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I have a 1997 Subaru Legacy Outback Wagon and im having a problem with it overheating. I changed the thermostat 3 times...replaced the radiator...and still overheats. I took the thermostat out of car and...

sounds like a bad water pump, if have thermostat out allready, remove cap start engine look inside rev engine see water move rapidly if not water pump bad, sure is problem

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