Question about 2004 GMC Envoy

1 Answer

Broken bolt on thermostat - 2004 GMC Envoy

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 4,793 Answers

You need to drill out (very small drill)the centre of the bolt,then use an "easyout"(backward screw)to remove not use too big a bit otherwise you will have to rethread the hole....

Posted on Aug 26, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Water pump thermostat

The hard bit is:-You will need to drill a hole down the centre of the broken bolt, when you have drilled about 2cm use a stud extract to ease out the broken bolt. Stud extractors are relatively cheap they are a tapered left hand thread which grips the side of the hole as you try and unscrew it. If you put a drop of brake fluid round the broken bolt and let it soak in, it acts as a penetrating agent. Take the drilling easy don't force it!

Dec 30, 2013 | 1992 Cadillac Eldorado

1 Answer

Broken bolt on thermostats housing

drill a hole in broken bolt get a easy out , good to have a spray can of MOVE IT !!!! really good stuff!!! spray on the move it put easy out in the hole , heat up broken bolt when Move it starts to bubble try backing it out !!

Oct 02, 2013 | 1989 Toyota Pickup SR5

1 Answer

Broken thermostat housing bolt

You'll probably have to drill out the bolt. Very carefully.
If there is any part of the bolt sticking out you may be able to use vise grips.

Jan 24, 2013 | 1990 Toyota Camry

1 Answer

What to disassemble to change thermostat

You will need to remove your air cleaner and duct assembly. You will then see the thermostat housing sandwiched between the back of the intake manifold and the exhaust crossover pipe. The service manual says to remove the exhaust crossover pipe, but trust me, you do not want to attempt this unless you have access to a torch to heat the nuts that hold the thing to the exhaust manifolds. If you break a stud, then you are going to be removing an exhaust manifold for broken stud removal. If you take the 8mm screws out of the heat shield on the exhaust crossover pipe, you can wiggle the heat shield out. This will provide enough room to get the lower thermostat housing bolt out. It is a pain to do it this way, but it works and will prevent broken exhaust pipe studs. Sometimes the little 8mm bolts will also break, but since they only hold the heat shield, it is of no great consequence.

Then all you have to do is remove the two bolts that hold the thermostat housing to the manifold. The thermostat is directly under it.
Then the only other real "trick" is getting the thermostat and O-ring to stay in the correct position while you put the thermostat bolts back in. A trick that I use is a small wooden wedge. I put the thermostat housing into place over the thermostat and O-ring, then place mt wedge between the thermostat housing and the crossover pipe to hold the thermostat housing in place while I start the bolts. Otherwise, the thermostat tends to slide out the bottom while you are trying to get the bolts started.

Let me know how it goes...

Jun 16, 2012 | 2002 Buick Rendezvous

1 Answer

How do you remove a broken 8mm bolt in the thermostat housing? I have the thermostat housing apart, some of the bolt is showing, I just need to know the easiest way to get it out without tearing it up...

This is easy if you have enough of the old bolt sticking up. You will need a good sized hammer, a very good set of vise grip pliers (round teeth not the flat teeth type). Now hit the bolt end with the hammer hard, hard enough to flatten the top of the broken bolt, but not hard enough to break the T-stat housing. Then you can spray some wd-40 on the bolt. Now clamp the vise grips on the bolt end. work back and forth back and forth to get it loosened. Then you can try and turn it on out. Hope this helps FixYa up.

Aug 04, 2011 | 1997 Lincoln Town Car

1 Answer

My thermostat bolt broke when i was screwing it back in. Its a jeep 2004 grand cherokee 7.7 v8 powertech. wondering what the peice is called that thrermostat housing connects to?

Can you run a drill bit (smaller than the bolt into the middle of the broken bolt? If so get a easy out from local auto parts store to pull broken bolt. Don't forget to pickup a new bolt.

Jan 15, 2011 | 2004 Jeep Grand Cherokee

1 Answer

Where is the thermostat located on a 94 toy/4 cylider

Follow the top radiator hose from the radiator to where it attaches onto the engine. The thermostat is inside the housing that the hose attaches to. Remove the radiator hose at thermostat housing. Remove the housing. There are usually two bolts. The thermostat is inside. Scrape off all old gasket material and clean the housing. Install new thermostat and gasket. Be sure not to overtighten the bolts on the housing. The housing is usually cast metal and is easily cracked or broken if the bolts are overtightened. Hope this helps and best wishes.

Jul 31, 2009 | 1994 Toyota 4Runner

1 Answer


Ouch! Was it from over-tightening or trying to remove the bolt?
Really, I need more information...
Regardless, you'll have to take the thermostat housing off and remove that broken portion of the bolt. The reason I asked if it was from overtightening, it should be a little easier since the threads aren't locked-up, to remove the bolt section. Hopefully there's enough bolt shank sticking up to lock some vice-grips to.
If the bolt broke trying to loosen it, you may have to drill into the broken bolt remnant and use an "Easy-out" to extract it.
I know... big pain. You can do it. Hey, stuff happens. Good luck!

Apr 25, 2009 | 1993 Saturn SC2

1 Answer

Broken bolt housing for thermostat gooseneck cover on intake mani

Hello, The only thing you can do is weld the broken area and the drill and tap the hole.
Go to and they have a solution for you. Good luck and let me know how you make out.

Jan 21, 2009 | 1995 Dodge Caravan

2 Answers

Broken screw thermostat

If you can remove the thermostat housing and the bottom bolt is visible, you can use a vise grip to remove it.
If the bolt is broken even with the block, then you have to drill it out.

Oct 05, 2008 | 2003 Jeep Liberty

Not finding what you are looking for?
2004 GMC Envoy Logo

Related Topics:

58 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

75822 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides