Question about Cars & Trucks

1 Answer

How can u unstick a thermostat on a 2002 trailblazer without removing the alternator?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Cheetah:

    An expert who has answered 20 or more questions within one hour.

  • Expert
  • 103 Answers

Repalce the thermostat. you don't need to remove the alternator to do gthat if you ahve the 4.2 or 4.3 engine.

Posted on Mar 21, 2014

3 Suggested Answers

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

  • 31 Answers

SOURCE: how to replace a thermostat on a 2003 chevy trailblazer

The thermostat is under the alternator.

If you have a memory saver to keep radio & PCM settings, install it now.

Remove negative battery cable from battery. Remove positive cable from alternator and disconnect harness plug from alternator.

Remove accessory belt noting how it is installed for later reinstallation.

Remove engine lifting hook in front of alternator.

Remove (3) bolts holding alternator on.

Drain coolant from radiator (may want to start this as first step as it takes a while). Loosen pressure cap to aid in system draindown.

Remove radiator hose from thermostat housing.

Remove two bolts from housing and remove from engine.

Reinstall is reverse keeping in mind the following:

Cleanliness counts where thermostat housing seals to engine.
Thermostat spring should point into engine.
If the thermostat has a bleed port, it should go to the 12 o'clock position (up).

Posted on Jan 14, 2010

alicantecoli
  • 22156 Answers

SOURCE: how do i remove alternator? 06 Chev Trailblazer

if you cannot remove the bolt then remove whatever is blocking your access

Posted on Apr 25, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

How to change thermostat 2002chev trailblazer 4cylnder


Ivan, Trailblazer only came with the 6 or 8 cylinders. You probably have the I6 engine. I have found that removing the battery AND battery tray makes this job really easy. Must remove alternator and alternator bracket. Pretty forward from there, make sure you replace your temperature sensor also while you're in there, it's right above the thermostat.

Apr 17, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

How to put a colling sensor in a 2002 traliBlazer


Lucky you! In 2006 the location was changed and is very difficult. In 2002 your engine coolant sensor is located right above your thermostat on the drivers side. While you're in there replace your thermostat also. Going through the wheel well is too difficult. I find that removing the alternator and alternator bracket, along with the battery and tray gives you compelte access to both the sensor and thermostat. Check your serpentine belt too since you do have to remove it, good time to change it.

Apr 04, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

Replaced thermostat now ac wont work 2003 trailblazer heat stays on


The thermostat is under the alternator. Remove Neg. battery cable, positive cable from alternator. Remove Alternator, drain radiat
if it can't help you i think you should buy a diagnostic tool and make a diagnostic by yourself or you can do it in a garage. there are a lot of good tools here: chinasinoy.com
hope it can help you!
cheer!

Nov 04, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

How do i change thermostat


See picture below, thermostat is located on driver's side of engine. You will have to remove the alternator to get proper access to the thermostat.


7_25_2012_11_17_41_pm.jpg

Jul 22, 2012 | 2002 Chevrolet TrailBlazer

1 Answer

How do I get to my thermostat in a 2006 chevy trailblazer I6


Must remove the alternator and alternator bracket to get to it. There are 2 bolts that are a bugger to get to. Bottom bolt on the alternator bracket, use a wracheting closed end wrench. Same with the bottom thermostat bolt.

May 05, 2011 | 2006 Chevrolet Trailblazer

1 Answer

How do you remove the bottom bolt of the thermostat housing on a 2004 trailblazer v6


V-6? Unless you've done an engine swap, it's an I6. With the stock I6 engine, must remove alternator and alternator bracket. Using a ratcheting wrench will help a ton for both the bottom bolt for the alternator and the thermostat, because the A/C lines are in the way, hard to get a socket in there.

Feb 25, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Is the thermostat on a 02 trailblazer with a straight 6 located on the end of the upper or lower radiator hose?The haynes manuel is saying upper and the guys at auto zone are telling me lower behind the...


It's upper, behind the alternator, so you're both right in a way. Upper is for the cooled coolant to go back into the engine, which has to go through the thermostat first. 2 ways to remove it are, 1. remove the alternator and then you'll have access to the thermostat. The other is to remove the front dirvers side tire to gain access. Might still need to remove the alternator for clearance.

Dec 11, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How to replace a thermostat on a 2003 chevy trailblazer with a 4.2 engine. One source says it is off the top radiator hose, and another says it comes from the bottom hose right behind the alternator. If it...


The thermostat is under the alternator.

If you have a memory saver to keep radio & PCM settings, install it now.

Remove negative battery cable from battery. Remove positive cable from alternator and disconnect harness plug from alternator.

Remove accessory belt noting how it is installed for later reinstallation.

Remove engine lifting hook in front of alternator.

Remove (3) bolts holding alternator on.

Drain coolant from radiator (may want to start this as first step as it takes a while). Loosen pressure cap to aid in system draindown.

Remove radiator hose from thermostat housing.

Remove two bolts from housing and remove from engine.

Reinstall is reverse keeping in mind the following:

Cleanliness counts where thermostat housing seals to engine.
Thermostat spring should point into engine.
If the thermostat has a bleed port, it should go to the 12 o'clock position (up).

Jan 03, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

What is best way to install thermostat on 2002 trail blazer 4.2 liter. should i remove the alternator, or should i go though the wheel well?



Removal & Installation

4.2L Engine
  1. Remove the necessary coolant from the radiator.
  2. Remove the alternator, as outlined in the Engine Electrical Section.
  3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing.
  4. Remove the thermostat housing bolts.
  5. Remove the thermostat housing from the engine block.
  6. Clean all of the surfaces of the thermostat housing.
  7. Clean the sealing surface of the engine block.
TO INSTALL
  1. Install the thermostat housing to the engine block.
  2. Install the thermostat housing bolts and tighten to 89 inch lbs. (10 Nm).
  3. Lubricate the inner diameter of the radiator hose with engine coolant.
  4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp.
  5. Install the alternator.
  6. Fill the cooling system with specified coolant and concentration.
  7. Inspect all sealing surfaces for leaks after starting the engine.
b691101.jpg
Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

Oct 23, 2009 | 2002 Chevrolet TrailBlazer

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

48 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...