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97 Tahoe out of no where it began hesitating after a week I notice my coolant hoses had too much pres sure changed thermostat and both coolant sensors

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  • 6 Answers

I don't really know how you came to the conclusion that they had to much pressure, but I doubt new hoses had any effect on how it ran. It sounds like it is ready for a good tune up, with new spark plugs and wires, oil change, cap and rotor etc

Posted on Apr 14, 2014

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  • Clyde Tatum
    Clyde Tatum Apr 14, 2014

    ok let forgr

  • Clyde Tatum
    Clyde Tatum Apr 14, 2014

    lets forget the collant issue, the truck also hesitates and at time wont pick up speed, three code thats been there 2 yrs befor the problem started which is crank collation, and two o2 sensors. but when out to eat and just checked under body one of the catalitic conv look like it has gotten hotter than the other. they are not even a month old and one looks more worn.

  • Montana Apr 15, 2014

    Okay, unfortunately I don't have much experience with the 5.7 vortec (witch I'm assuming you have) i have heard of bad o2 sensors effecting performance because they relay information to the truck to control fuel/air ratios. Sorry I can't be of more help and I hope you come across the solution to your problem soon

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the best thing to get is the Haynes manual for your car at advanced auto or autozone or somewhere like that and the book will tell you how to take everything apart and put it back. i think the manual is about $16.00

Posted on Jul 30, 2008

ddbmike
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SOURCE: 97 Catera low coolant light is on

sensor is part of the overflow tank. lift the tank up and unplug the plug on the bottom. you can just cut off the plug and splice the two wires together or take a bread tie and strip off the paper then jump out the plug. to replace the sensor you must buy a new tank.

Posted on Jun 23, 2009

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SOURCE: CHANGING WATER PUMP 96 MERCURY MYSTIQUE STILL

check for a bad head gasket

Posted on Sep 05, 2009

outdoorsman5
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SOURCE: Vaccum hose diagram for 97 chevy tahoe 5.7 liter

I have the diagram you need. If you send me your email I will scan it off and send it to you. outdoorsman592003@gmail.com

Posted on Sep 12, 2009

Mike2015
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SOURCE: 95' Cadillac DeVille has no heat

There is several ways to see. 1. It could still be the heater core, try blowing air in to IN house, if it comes out the OUT hose strong, its not that. 2. It is posible there is an a pocket in the system. Try bleeding the air hose, that could be it. 3. Take the glove box out, disconnect the air bag CAREFULLY! Start the car, And turn the heat all the way up, then all the way down. U should see a arm move back and forth. MAke sure it goes ALL the way shut, and open. 4. It could be that the doors in the dash don't work. I'm not sure how to do this. Hope the other work!!

Posted on Nov 12, 2009

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You could have a pin hole in your hose or in your radiator.

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Engine Coolant Thermostat Replacement (4.2L Engine)
Tools Required
J 38185 Hose Clamp Pliers

Removal Procedure
Remove the necessary coolant from the radiator. Refer to Cooling System Draining and Filling .
Remove the generator. Refer to Generator Replacement .



Loosen the outlet hose clamp at the thermostat housing (1). Remove the outlet hose from the thermostat housing.



Remove the thermostat housing bolts.
Remove the thermostat housing from the engine block.
Clean all of the surfaces of the thermostat housing.
Clean the sealing surface of the engine block.
Installation Procedure




Install the thermostat housing to the engine block.
Notice: Refer to Fastener Notice in the Preface section.

Install the thermostat housing bolts.
Tighten
Tighten the bolts to 10 N·m (89 lb in).

Lubricate the inner diameter of the radiator hose with engine coolant.



Install the outlet hose to the thermostat housing (1). Secure the hose with the clamp.
Install the generator. Refer to Generator Replacement .
Fill the cooling system with specified coolant and concentration. Refer to Cooling System Draining and Filling .
Inspect all sealing surfaces for leaks after starting the engine.


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102900_tstat_2.jpg

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How do I change or unstick my thermastat in my 1997 tahoe?


Just follow the top radiator hose to the engine and find the bell or ball shaped housing, You don't have to remove the hose, but you want to catch the coolant, pull the 2 bolts out and have a new thermostat and gasket ready, use no sealant, the thermostat cannot be fixed just replaced, Get the recommended temp, 165 or whatever, you should be all set, put the coolant back in. Hope this helps.

Jan 09, 2011 | 1997 Chevrolet Tahoe

1 Answer

My chevy tahoe takes to long to heat up


To check if the thermostat is bad, start a cold engine, and feel both of the radiator hoses.
While they should both start cold, only one should heat up slowly. The other should stay cold.
Then after the warming one gets hot, only then should the other hose also suddenly get hot.
If both slowly get warm, then the thermostat needs to be replaced.
(By the way, make sure the coolant is full.)

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Theres a strong possibility being you just changed the coolant a few weeks ago that theres air in the cooling system not allowing the coolant to cirrculate properly, look at your top radiator hose is theres a small bleed valve at the top of the thermostat housing when the upper hose attactes to? If so loosen the bleed valve and allow the cooling system to purge the air out of the system you can tell when the air is out of the system when a steady stream of coolant starts to flow out of the bleed valve, if theres no bleed valve take the top radiator hose off of the engine side and allow the cooling system to purge the air out through the top of the engine that way, but it definatly sounds like theres air in the system not allowing for the cooling system to cool properly...

Dec 07, 2010 | 2003 Mitsubishi Galant

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How do you change the thermostst on 2004 L-6 trailblazer


Engine Coolant Thermostat Replacement (4.2L Engine)
Tools Required
J 38185 Hose Clamp Pliers

Removal Procedure
Remove the necessary coolant from the radiator. Refer to Cooling System Draining and Filling .
Remove the generator. Refer to Generator Replacement .



Loosen the outlet hose clamp at the thermostat housing (1). Remove the outlet hose from the thermostat housing.



Remove the thermostat housing bolts.
Remove the thermostat housing from the engine block.
Clean all of the surfaces of the thermostat housing.
Clean the sealing surface of the engine block.
Installation Procedure




Install the thermostat housing to the engine block.
Notice: Refer to Fastener Notice in the Preface section.

Install the thermostat housing bolts.
Tighten
Tighten the bolts to 10 N�m (89 lb in).

Lubricate the inner diameter of the radiator hose with engine coolant.



Install the outlet hose to the thermostat housing (1). Secure the hose with the clamp.
Install the generator. Refer to Generator Replacement .
Fill the cooling system with specified coolant and concentration. Refer to Cooling System Draining and Filling .
Inspect all sealing surfaces for leaks after starting the engine. 8387794.jpg

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Look for air bleeds, and read owners manual, some cars have coolant bleeds. Also, heater on high when filling coolant or risk bubbles...

My thought is that your fans may not be kicking in. They should cycle on and keep temp low enough. test them.

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