Question about 2000 Chevrolet Silverado

7 Answers

2001 Chevrolet Silverado 5.3L 4WD overheating after changing waterpump

2001 Chevy Silverado 5.3L 4WD. I changed out the water pump (opted for a new one, not remanufactured) and changed out the thermostat. I slow filled the return container with antifreeze until I saw no more bubbles. I turned on the engine and let it run for about 10 minutes. The engine temperature went to 250degF in no time. Killed the engine and felt the top hose. It was tight and so was the bottom hose. After scratching my head for a while, I took the cap off the return container and added a gallon of water. I put the cap back on, started the engine and got the same overheating. I took the new thermostat off and put the old one back on (which is only a year old) and went through all the steps above. Same thing. I let it cool down, and when I went to take the cap off, it blow off and sprayed water all over. Thank God the water was only warm and not hot. I got mad and went inside to cool off. And here I am typing out this problem with no idea what is going on.

Posted by on

  • 1 more comment 
  • crosswalker Jun 03, 2009

    I replaced the water pump because it was leaking. The engine never overheated. I have since changed the water pump and thermostat again ( the local auto parts store has been extremely helpful :ABC Auto Parts) but I am still overheating. The radiator does not have a radiator cap. I have a reservoir / return bottle with a cap. I am getting hot now right as the thermostat opens up and I am thinking head gasket (although I never overheated the engine).

  • Gary woods Jul 28, 2013

    Same problem pulled heads took to-machine shop nothing wrong put back together same problem so don't pulled heads

  • Gary woods Jul 28, 2013

    Also did check for exhaust gases in over flow jug has none

×

Ad

7 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 401 Answers

If it is building that much pressure that quick
then i would say that you have a head gasket problem
why did you replace the water pump cause of a leak or becuause it was overheating?

Posted on Jun 03, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 116 Answers

When you replaced your water pump you drained all your coolant now to top it off leave the cover off your tank cause as your thermostat opens it will allow more water to enter your block. keep topping it off till it doesnt drain into your block anymore. this will be a while since when you add water it cools your thermostat and closes and will reopen when reaches temp.

Posted on Jun 03, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 232 Answers

Two possibles,the thermostat is in backwards and I really doubt that,by your post you seem pretty knowledgable,but its wortha check to see if the spring assembly is pointed towards the motor and not the radiator,the second would be an air lock in the cooling system,try running the system without out any pressure on the system this should allow any air to work its way through.

Posted on Jun 03, 2009

  • 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.

  • Master
  • 1,305 Answers

Instead of filling the overflow container first, open the radiator cap... it's a tight fit... do it when the car and you have cooled off (ha!) and fill the radiator.. then fill the overflow to just below the add line...run it and let it warm up... did it help?
It may back some coolant out... but then equal out..

Posted on Jun 03, 2009

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 3 Answers

Remove coolant return hose from tank 2 read iator see if coolant comes out radiator side if not then radiator is clog try back flushing with water hose and some clamps if not try replacing radiator back flushing worked for me. Symptoms was overheating no heat and radiator hot on one side and cold on the other top hose hot lower cold after water pump and t-stat was replaced I removed the return hose and nothing came out the radiator

Posted on Oct 09, 2014

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Corporal:

    An expert that has over 10 points.

  • Contributor
  • 5 Answers

Don't do that, it'll just get you burned, if your heater isn't working first check the interior air filter. You have to remove a large black cover from the passenger seat. Once off just pull towards u on the obvious spot the filter is in. Then look to the left and you should see a black plug with wires coming from it. This is your heater relay. Unplug it, inspect it and start the car while still unplugged. Turn your heater on and plug it back in. My Tahoe had the same problem, clogged air filter and a filthy relay plug.

Posted on Jun 21, 2013

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Im having the exact same issue with my 04' tahoe with a 5.3l Did you find out anything

Posted on Sep 21, 2010

  • daddy_van Jan 02, 2011

    i also having the same issue with my 04 tahoe with the 5.3l. it started to overheat and not blow any hot air. i replaced the thermostat first and had the same issue. next i replaced the water pump. still overheating. it was apparent when i pulled the water pump that it was not pumping fluid. now it is but is still over heating and blowing cold air. i have heard of filling it up by pulling the top hose of the radiator at the radiator and filling it there till it comes out. i helps avoid the air bubbles. but why would the heater still blow cold air. im hoping its not the heater core

  • Gary woods Jul 29, 2013

    Replace the radiator fix my truck

×

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.
Good luck!

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:

3 Answers

Have 2005 chevy Silverado and its overheating have changed the water pump and thermostat have new hoses what else could be the problem


I would run radiator cleaner thru truck several times till water is clear and fill with correct ratio of antifreeze/water. Check oil if milky you have a cracked head or head gasket . clutch fan may not be engaging radiator old or incorrect for truck Semper Fi!

Feb 05, 2015 | 2005 Chevrolet Silverado

1 Answer

Will shocks off a 2001 chevy truck fit a 1995 truck 4wd


The description is vague. If you are asking if shocks from a 2001 Chevy Silverado, K1500 will fit a 1995 Chevy Silverado K1500, the answer is no (on front and rear shocks). I also looked up a 2001 Chevy S10 4wd and a 1995 Chevy 4wd. The answer is yes (on front and rear shocks). I hope that helps but if not please write back with the exact two vehicle descriptions.

Jan 11, 2014 | Cars & Trucks

1 Answer

I have a Chevy 2001 1500, I changed the thermostat and still have heat at first then it gets cool. Any ideas ?


sounds like your heater matrix could be blocked try flushing out but when you refill system undo one hose on your matrix at the rear of engine compartment to bleed air out of matrix this should help if not it may be you need a new water pump

Jan 02, 2014 | 1999 Chevrolet Silverado 1500

2 Answers

Have changed the water pump, thermostat, radiator, radiator cap, all hoses. 2001 chevy venture, still running hot? How long does it take to bleed the cooling system?


If the system fills via an expansion tank, I would recommend removing the top hose from the radiator and filling the system by pouring the coolant in through the hose until it begins to flow out of the upper radiator port. Reconnect the hose and then fill the expansion tank. That should take care of it.

Jun 26, 2011 | 2001 Chevrolet Venture

1 Answer

2005 chevy is running hot is it the water pump ?


CHECK WATER PUMP WEEP HOLE IF ITS LEAKING.THEN PUMPS SHAFT BEARINGS FAILING MEANING YOU NEED A NEW WATER PUMP.IF WATER PUMP OKAY.I BE LOOKING AT THE THERMOSTAT AND RADIATOR PRESSURE CAP.

Apr 14, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

2001 Chevy 4WD button lights don't come on - 4WD wont engage


check the solenoid on the front chunk these vehicles have had a lot of problems with these solenoids. have personally replaced about 10 of these on 98-02 models.

Aug 26, 2009 | 2001 Chevrolet Silverado 1500

3 Answers

Process to change fuel pump on 2001 chevy silverado 1500


take the six bed bolt loose and then take three buddies slide the bed back put in the new pump slide it back n place and put the bed bolts back in. if u drop the tank u can easily break the hard plastis lines that go to the fuel tank. u only have to take the fill lines and taillight wires loose this way its alot quicker, and easier.

Jul 29, 2009 | 2001 Chevrolet Silverado 1500

2 Answers

99 Chevy Silverado is overheating after maintance on radiator


try checking the hoses for blockage,and if not that make sure the fan is working right as it might be the fan cluch,or your water pump may have went out,best of luck

Mar 12, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

No Heat and Overheating in 1999 Chevy Silverado


After replacing the thermostat, you must bleed the air from the cooling system.

To bleed air from the 2.2L and 2.5L engines, remove the plug or sensor on the top of the thermostat housing. Fill the radiator with coolant until the coolant comes out the hole. Since the plug is made out of steel and the thermostat housing is aluminum, it is a good idea to apply an anti-seizing compound or Teflon® tape on the plug threads prior to installation. Install the plug and continue to fill the radiator. This will vent all trapped air from the engine.

Any trapped air in the heating system will have to be displaced by coolant. Once the cooling system is filled, with the radiator cap off, turn of the heater at it's highest setting. Start the engine and allow it to reach operating temp. You should see a drop in the coolant level as the air in the heating system is displaced by coolant. Add coolant to the proper level and replace the radiator cap.

Keep a close eye on the coolant level for at least the next couple of weeks. The cooling system is a "closed" system. Any significant decrease in coolant level indicates a problem.

If you have any questions, let me know.

Please take the time to rate this solution.

Drive safe and be warm.

clarkco

Feb 02, 2009 | 1999 Chevrolet Silverado 2500

Not finding what you are looking for?
2000 Chevrolet Silverado Logo

4,374 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides

Loading...