Question about 1999 Oldsmobile Cutlass

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My 1999 Oldsmobile Cutlass V6 is running way hot. I have replaced 2 thermostats,the water pump,radiator,coolant,fuses,and fan relays. But yet the car is still running at just below the red on the gauge and after a short 2-3 mile drive is spraying water from overflow tube on the coolant tank. The car is not showing any trouble codes when i scan it. No problem codes read and none to erase. I have dropped the oil twice now and both times it looked fine,no water in it. I also pressure tested each cylinder and all were good and within 1-2 psi of each other. I am at a loss and need a direction if you can help that would be great. Thanks much-

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Make sure the antifreeze is a 50/50 mix and you may want to replace the temperature sensor. The temperature sensor is on the manifold just in front of the thermostat housing and make sure there is no air in the cooling system. Idle the car and place the heater on high to cycle the coolant through the entire system, with the radiator cap on the first click letting any fluid expansion to follow in to the over flow tank and when the engine cools. The radiator will pull the coolant from the over flow tank, once all the coolant has been cycled and no air in the system. Tighten the radiator cap to the second click and that should help you burp the coolant system. As for the temperature running hot could be a faulty sensor, so replace it and it not that expensive and take under 15 min to replace. Good luck friend. 

Posted on Jul 15, 2009

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All though all the previous answers are good things to check. most likely though the problem is the intake manifold gasket. this is a very common problem with car. it is a lot more expensive of a problem. much more labor intensive. but if you have the extra tools to do a pressure check you probly got the tools to do this job too. if you haven't done it before buy a repair manual and you'll be fine.

Posted on Jul 27, 2009

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I am going to presume that the cooling fan does work when required. It seems you have replaced the whole cooling system. The only thing that comes to mind is that compression pressures are entering the cooling system. This would account for you overheat symptoms. Most rad shops have a simple tool to check for this. It uses a liquid that changes color if there are compression gases present in the cooling system. Cost should be minimal. It is possible to get compression into the system without showing up as coolant in the oil.

Posted on Jul 15, 2009

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1 Answer

Overheating


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2 Answers

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Apr 19, 2011 | 1999 Oldsmobile Alero

1 Answer

I have oldsmobile alero 1999, problem is that the engineer idles after running for an hour or when engine is getting hot


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3 Answers

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2 Answers

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