Question about 2001 Chevrolet Blazer

1 Answer

2001 blazer has new radiator, water pump heater core and thermostat and new intake gasket but still runs hot

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 17,970 Answers

Stuck or backwards thermostat, the spring should face the engine. If its a serpentine belt system, the belt may not be routed correctly around the water pump causing it to spin the wrong direction. Blown head gasket, or cracked head. If none of the above is the problem, try adding a engine treatment at next oil change. Most advanced friction reducer availible.

Haynes Manual suggests if the water pump has been replaced with a serpentine belt and a reverse rotating water pump it might have been replaced with an earlier, normal rotating water pump instead of the reverse rotating type. It also suggests the radiator cap not maintaining normal pressure, fan not functioning properly, radiator core blocked or radiator grill dirty and restricted, drivebelt defective or not adjusted properly.

Also, here I post the comment and solution from other Blazer's user...
QUOTE
Problem: when I turn off the motor after driving for a while and wait a few minutes (i.e. go into a store.) when I come back and start it up it is always between 210-240deg. Is this normal?

I am running a Jet 180º thermostat , green antifreeze with a bottle of Redline water wetter , TransPro "extra capacity" radiator, LS1 electric fans, cowl induction hood and a CS144 High Output Alternator.

The first change was to add the larger radiator. Around here in record heat , once the system was hot no amount of airflow would cool it back down. That was greatly improved after the addition of the new radiator.

Next step was to get a head start on cooling and not run quite so close to the edge. That is where a lower temperature thermostat comes in. I did have to relocate the IAT sensor in order to make the combination work. The 2001 PCM is just too tight to get away with it. That information is all in another thread - Relocating IAT.

Now to match the cooling fan to the lowered operating temperatures. I was unable to find a clutch fan in other than the stock temperature. The stock fan really does a pretty good job, but locks in way to late. I opted to go with electric fans. In order to maximize the fans operation a bigger alternator is needed. The stock alternator is already working pretty hard. The addition of the electric fans is not what it needs. As heat builds the voltage drops and so does fan speed. Adding a bigger alternator helps in several ways. You maintain voltage to keep fan speed maximized, and it runs cooler since it is not having to work as hard.

There may have been some other mods that are contributing to the package. Such as a free flowing exhaust system. Modified front license plate mount area (cut out for flip down plate mount). Cowl induction hood lets the heat out at slow speeds and draws cool air at higher speeds. 2" body lift makes some room for the air to move out over the engine and transmission. Auxiliary transmission cooler helps to dissipate some of the heat to the airflow rather than the coolant. New radiator cap that doesn't allow air into the system. Restricted EGR system doesn't introduce as much hot gasses to the intake.

Some of these "small differences" may or may not affect the outcome. Lots of small changes can make a difference though.

My package seems to be working pretty well in a high desert environment.
END QUOTE.

About this, HERE can find other comments and recomendations.

Hope helps.

Posted on Jun 03, 2010

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

2005 Pontiac grand am overheating replaced intake gasket checked hoses replaced thermostat what else could it be


Could be a blocked heater core. Could be a head gasket or a warped head or block if it got to hot at one time.

Jul 01, 2017 | Pontiac Cars & Trucks

1 Answer

Driver side back seat floorboard soaking wet just replace radiator and thermostat and it's overheating what could be the problem on a 2001 Ford Mustang


Is the floor also wet under the dash? This could be a lot of things why your car is running hot. Could be a head gasket, cracked cylinder head or block, stopped or restricted radiator, water pump impeller faulty with broken vanes, stopped up heater core, cracked water jacket and or a leaking intake manifold gasket. So as I stated could be a slew of causes. You'll have to actually diagnose the cause by checking from the easiest cause to the hardest.

Sep 09, 2016 | 2001 Ford Mustang

2 Answers

2001 Blazer Replaced heater core now water pump is squealing and seems like low circulation


my 98 Blazer I had to replace radiator water pump heatercore and hoses. Had head gasket go. Once that happens air and dexcool corrode cooling system. Do you smell antifreeze? Are you loosing antifreeze? Check oil see if its another color not clear or black but i think light brown. Have you flushed out system?

Jan 31, 2013 | 2001 Chevrolet Blazer

3 Answers

1998 chevy blazer After the repair shop replaced the blown intake gasket, I have no heat from the heater. I took the heater hoses off and ran water thru the heater but still no heat


Is the vehicle running at normal temperature..If its running cooler than normal,then it might be the thermostat..Feel the upper radiator hose after the vehicle hot..It should be hot to touch

Sep 05, 2011 | 1998 Chevrolet Blazer

1 Answer

My truck is running hot with the ac on and the radiator is about half empty. i do not see any water leaking and i have the heater hoses disconnected because of the heater core. could it be a bad water...


A common problem is a leaking intake manifold gasket. Put the thermostat back in ( the correct one), otherwise it will never run correctly. Make sure the cooling fan is operating correctly.

Aug 02, 2011 | 1998 Chevrolet S-10 Pickup

1 Answer

Heater fan blows good but only blows cold air. Is it the heater core? The thermostat? How hard are they to replace if i do it myself?


Check the heater core by checking the hotness or coldness of the 2 tubes at the firewall that lead to the heater core.

If both tubes are hot, the heater core is fine. If both tubes are cold, then the heater core is plugged up and will have to be flushed out or replaced.

The thermostat, if stuck open, will delay the heating up of the heater core. It's not hard to replace the thermostat.

Thermostat Removal & Installation 4.2L Engine To Remove:
  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • Some of the coolant
    • The upper radiator hose f150_42_thermostat.gif

    • The bolts (A).
    • The water outlet connection (B)
    • The water thermostat and paper gasket assembly (C)
To Install:
NOTE: The water thermostat is indexed and must be installed correctly.
  1. Install or connect the following:
    • The water thermostat
    • The thermostat
    • The water outlet adapter
    • The bolts
      1. Torque to: 80 inch-lbs (9 Nm)
    • The upper radiator hose
    • The coolant
4.6L/5.4L Engines To Remove:
  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • Some of the coolant
    • The upper radiator hose f150_46-54_thermostat.gif

    • The bolts (A)
    • The water outlet connection (B)
    • The water thermostat
    • The O-ring (discard)
To Install:
  1. Install or connect the following:
    • A new O-ring to position the water thermostat in the upper intake manifold
    • The water outlet connection onto the upper intake manifold
    • The bolts
      1. Torque to: 18 ft-lbs (25 Nm)
    • The upper radiator hose
    • The coolant
prev.gif next.gif

Jan 28, 2011 | 1997 Ford F150 Regular Cab

1 Answer

My blazer is over heating. I have changed the thermostat and flushed the radator and heater core. I have no leaks, but it still over heats.


Is the water pump working? When you run your car until it is at the operating range on the gauge, does the top radiator hose get warm (hot). Your motor block might have a calcium block. Make sure to use distilled water to fill up the rad.

Jan 23, 2011 | 2001 Chevrolet Blazer

1 Answer

Heater not blowing heat only cold


Check the coolant level. It is common for the intake gaskets to leak causing the coolant level to drop. The first thing to stop working when the coolant gets low is the heater. Top off the coolant and determine where you are leaking coolant whether it be the intake gaskets, hoses, radiator, water pump, etc.

If the coolant is full what does the temp gauge say? Once the vehicle is warmed up it should read around the 200 degree mark. If its below 190 than the t-stat is stuck open. Replace the thermostat.

If both of those are fine and the coolant looks like mud than your heater core is plugged. You can try back flushing it with a water hose. Remove both of the heater core hose and use a water hose to flush out the heater core. This may take several tries before you start to feel some heat.

Nov 14, 2010 | 2001 Chevrolet Blazer

1 Answer

How to change a heater core


hi try this save to file then zoom in.6332883.jpg

Feb 06, 2009 | 2001 Pontiac Grand Am SE

4 Answers

Overheating


Did I read that right and it has no thermostat?

Running it without a thermostat will cause it to overheat.

The problem is there is nothing to slow down / restrict the coolant and let the radiator do it's job.

A very common misconception on how cooling systems work..


Jun 06, 2008 | 1994 Chevrolet S-10 Blazer

Not finding what you are looking for?
2001 Chevrolet Blazer Logo

Related Topics:

63 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7772 Answers

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

Answer questions

Manuals & User Guides

Loading...