Question about 1999 Chevrolet Tahoe

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Stuck bolt on 1999 thermostat

The bolt is rounded and stuck on the back side of the thermostat. I have tried to tap it lightly, used some "break free" fluid, and it still won't budge, and is getting too rounded to use a socket. How can I break it loose?

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  • 6 Answers

You might want to get advice from a mechanic to unsure that you don't worsen anything

Posted on Jan 01, 2014


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Posted on Jan 02, 2017

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SOURCE: best way to replace thermostat on a 1999 chevy

HI" the best to get to it with out a struggle is to remove the cross over pipe make sure engine is nice and cold apply plenty of wd -40 to 4 bolts holding cross over pipe in place ,this will save you lots of frustration ,you can go the other route 13 flex pref 1/4 and plenty of patience when put in it back together ,hope this helps

Posted on Sep 23, 2009

Testimonial: "very helpfull"

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SOURCE: i am trying to take off a brake rotor on a 82

Yes,and no.There are tabs bent over from behind the nut.Bend these tabs straight so the nut can turn.If it had a lock,and you removed it,then there will be no tab.You can buy a special wrench,or use a chisel and a hammer to turn the nut.A socket is easier,but it can be done this way.they will be a washer behind the nut,and another nut,then you are home free.I hope this was helpful.

Posted on Oct 06, 2009

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SOURCE: how can i remove/unscrew a rounded bolt

very very difficult i feel for ya. id try a undersize socket and extension use hammer to drive on bolt head or if at all possible vise grips. also attempt a 6 point box end wrench if it will fit. last resort vise grips. if all else fails left handed drill bits and screw extractor

Posted on Nov 15, 2009

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SOURCE: 2004 trailblazer! how and what tool must be used

sears craftsmen makes a box/opened emd wrench that ratchets, provided you can get a box end wrench on it.

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SOURCE: front and rear shock bolts are warn need help

Only thing left now is to cut them off with a torch, chisel them off or, use a small cut-off wheel.

Posted on Jun 06, 2010

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If my fans stop working and plus my motor heats yp fast by the temp gage could this mean I need a thrmastat also when I replace my fans that cool my motor and where is my thermostat located at,?

follow the top radiator hose to a round piece your thrmostate is under that be carefull noy to break bolts off if you have any doubtes about bolts take it in to replace thermostate about 120.00 worth it if bolts beak 250.00

Oct 08, 2014 | 1999 Oldsmobile Cutlass

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I am a woman trying to locate or see what the thermostat under my 1999 chevy tahoe looks like?

The thermostat is inside a round ball at the engine side of the upper radiator hose. There are two bolts holding the housing to the engine and a paper gasket to seal it.

Mar 18, 2011 | 1999 Chevrolet Tahoe

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How do i change a thermostat on a hyndai elentra 1999

1.Disconnect the battery cable from the negative terminal

2.Drain the cooling system.If the coolant is relatively new or in good condition,save it and reuse

3.Follow the upper radiator hose to the engine to locate the thermostat housing

4.Loosen the hose clamp then detach the hose from the fitting.If its stuck,grasp it near the end with a pair of large adjustable pliers and twist it to break the seal,then pull it off.If the hose is old or deteriorated,cut it off and install a new one

5.Inspect the condition of the outer surface of the thermostat cover inlet that mates with the hose.If its corroded or pitted,replace the thermostat housing cover

6.Remove the thermostat housing cover bolts and then remove the cover.If the cover is stuck,tap it with a soft-face hammer to jar it loose.Be prepared for some coolant to spill as the gasket seal is broken

7.Note how the thermostat is installed (which end is facing out)and then remove it

8.stuff a rag into the thermostat housing,and then remove all traces of old gasket material and sealant from housing and cover with a gasket scraper.Remove the rag from thermostat housing and then clean the gasket mating surfaces with lacquer thinner or acetone

9.Install the new thermostat in the housing.Make sure that correct end faces out.The spring end is normally directed into the engine and that the bleed hole is at the top

10.Apply a thin ,uniform layer of RTV sealant to both sides of new gasket and position it on the housing.

Jun 25, 2010 | Hyundai Motor 1999 Elantra

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The bleeder valve on mt slave cylinder won't break loose please help

Hi, try giving a dose of wd40 etc on the thread & leave for a while, also a gentle tap on the end can help sometimes. If it's already been rounded off & you can't get a spanner to grip, try using vice grip locking pliers, or if it's an sae bleeder, try tapping a metric socket on or vice versa if you can find one that's slightly smaller than the correct size. Hope this helps :)

Dec 26, 2009 | 1992 Jeep Wrangler

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How can i remove/unscrew a rounded bolt

very very difficult i feel for ya. id try a undersize socket and extension use hammer to drive on bolt head or if at all possible vise grips. also attempt a 6 point box end wrench if it will fit. last resort vise grips. if all else fails left handed drill bits and screw extractor

Nov 15, 2009 | 1999 Chevrolet Cavalier

1 Answer

Need to replace thermostat 2000 taurus

If it's the 3.0L Vulcan Engine (OHV), the thermostat is on the driver's side of the vehicle. Follow the upper radiator hose back to a metal area with three 10mm bolts. This is the thermostat housing. Undo the bolts, and there's the thermostat. Mark the back of it with the old thermostat in it (if you get one with a jiggle valve, it'll make it easier to put the new one in because the jiggle valve needs to be on top). The thermostat and housing aren't perfectly round, so you'll have to play with it a little to get it to line up. Make sure to change the gasket. The spring side of the thermostat goes into the engine.

The water pump is in the serpentine assembly. It's the larger pulley located toward the firewall. It'll be easiest to remove the water pump if you also remove the coolant recovery tank. The water pump pulley has four 1/2" bolts that you need to take out WITH THE BELT STILL ATTACHED. I can't stress this enough. The belt will keep the pulley in place so that you can remove the bolts. Take the pulley off, then the belt. Remove the heater hose at the top and the radiator hose at the bottom. There are 12 bolts of two diameters (1/2" and 10mm if I'm not mistaken). Tap the heater hose lightly with a soft-faced mallet to break the seal with the gasket. Trash the old gasket. Replace gasket (you can also line the mating surface of the water pump with RTV Sealant, put the new gasket on the new pump, and line the other side of gasket with a second coat of RTV sealant if you want a really good seal). Install the water pump and torque to manufacturer's specs. Attach the pulley to the water pump hand tight and put the belt back on. Tighten the pulley bolts. Put the coolant recovery tank back in place. Fill with coolant, start engine, bleed and check for leaks.

To bleed cooling system: Idle the engine until the thermostat opens (you'll be able to tell bacause the upper radiator hose will be uber hot and you'll feel coolant running through this hose). Squeeze all hoses in the system that you can reach, but don't burn yourself. Stop the engine and let it cool. Open the radiator cap and squeeze the COLD upper radiator hose. You'll see some bubbles in your recovery tank. You might have to monitor your coolant level for a couple of days while the final bits of air are purged through your radiator cap (that's why it's pressurized).

Hope this helps. It's not hard, but it took me quite awhile.

Mar 28, 2009 | 2000 Ford Taurus

1 Answer

Intake manifold sealant repair now leaking maybe oil? coolant b4

You need to remove the thermostat housing again. Then you will have to extract the bolts you broke off. You will need to drill and tap them so you can use an easy out to remove the broken bolts from the threads. Then you can clean up both mating surfaces and replace the gasket and the thermostat. Check to make sure you did not crack the thermostat housing or you may have another leak when finished. They are usually aluminum and break easily if too much pressure is applied or they are corroded and weak.

Feb 25, 2009 | 1999 Ford Taurus

2 Answers

Need to install a thermostat of a nissan altima

Dear Guest: If you have some reasonable mechanical aptitude, it is a simple task on this engine to do.
The thermostat is located near the front to the engine (the side closest to the belts) and on the side where the radiator is.
Follow the top radiator hose to the engine and you will have found the thermostat housing.
1. Make sure the engine is cool before doing this job.
2. Get a drain pan and drain the coolant from the radiator. The drain **** for the radiator is located at the bottom of the radiator. Some have an end which can be turned without tools and others require a flat screw driver to unscrew the fitting from the bottom of the radiator. Make sure you remove the radiator cap, as it will drain much faster. Once drained, put the drain **** back into the radiator. Be careful and DO NOT OVER TIGHTEN IT! It will snap off in the radiator!
3. Release the hose clamp which secures the hose to the thermostat housing and then grasp the hose at the neck where the clamp was and try to rotate the hose on the housing. DO NOT try to just pull the hose off. Break it loose first by rotating it on the housing. If it is stuck, get a small screw driver and carefully, slide it in between the hose and the housing, working it around until you can rotate the hose. At that point you can remove the hose and push it off to the side or take it loose at the radiator as well. CAUTION!!!!! the radiator tanks are plastic and will break if you are not careful!
4. There are 3 bolts which retain the housing to the cylinder head.
Typically the bolt head size is a 10mm. Using a 10mm socket, rotate the bolts in a counter clockwise direction, removing all three bolts. There are some that did use a 12 mm bolt head size. Most of the time the housing will just come loose. Sometimes, it will stick. If so, a light tap will break it loose. Pay attention as to how the thermostat is positioned in the cylinder head prior to removing it. Most of the time it will pop out easily or you can easily pry it out with a small screw driver. CAUTION!!!!
Do not damage the mating surface where the gasket seals.
Carefully clean the old gasket off. A single edge razor works fine.
5. The thermostat has a top and a bottom. If you look closely, you will see a place in the outer parameter of the thermostat where there is a small hole, often with a little metal tab which projects through the other side and is able to jiggle some. This is a small bleeder to help bleed the air trapped in the system when it is installed. This part of the thermostat must be at the 12:00 position.
Additionally, make sure the part with the hoop is sticking out toward you. The cylinder head has been machined to allow the thermostat to fit flush with it when installed properly.
6. Clean the old gasket from the thermostat housing. Nissan utilizes a liquid gasket sealer (silicon) which you apply a "SMALL" bead around the water inlet (the cylinder head side), let the sealer skin lightly and then put the housing in place making sure that the thermostat had remained seated during the installation. If it had come loose and you try to tighten the bolts, you will crack the thermostat housing.
7. When you tighten the thermostat housing bolts, there is a torque specification however most people don't have torque wrenches which measure in inch pounds. For those who have a torque wrench, 10mm bolts:56.4-66 inch lbs, 12mm bolts 12-14 ft lbs.
I have found that the easiest way to keep from over tightening the bolts is to grab the ratchet from the head and tighten the bolts because you don't have the leverage at that point.
8. Let the silicon dry for 10 minutes and and then fill the system back up with coolant. Reattach the hose and clamp being careful not to over tighten the hose clamp.
If you are replacing it, not more than a 50/50 mix. There is no special bleeding procedure Nissan has for this car. Just fill the radiator with coolant, turn the heater inside the car to the heat position to allow coolant flow into it as well, because it too is part of the cooling system in terms of coolant capacity. I usually fill the radiator until it shows 1/2 way up the tank. As the engine warms up,prior to the thermostat opening, more often than not, the coolant level will rise dramatically before it drops. Once the thermostats has opened top the system off, put the cap on and let it run for a while and watch for leaks. Take the car on a short loop and then recheck for leaks again. If everything has gone well, the temperature will read normal and no coolant will be leaking.
Hopefully this should be sufficient to answer your question.

Dec 20, 2008 | 2001 Nissan Altima

1 Answer

Tried to replace thermostat broke both fastening bolts to the hou

The only way to get a broken tap out will be to use a punch and break it out

Dec 07, 2008 | 2006 GMC Sierra Denali

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