2001 chevy diesel 2500...cooling system...blowing cold air from heater/defrost...low coolant lite coming on...start to remove reservoir pressure...

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Customer

2001 chevy diesel 2500...cooling system...blowing cold air from heater/defrost...low coolant lite coming on...start to remove reservoir pressure cap and great amount of pressure and coolant spill thru overflow tube before cap compeltly removed...Took to dealer for repairs...two thermostats replaced and pressure cap too...two days later low coolant lite again came on...repeat of problem I took truck in first time...I will drive truck approx 10-15 miles before water temp gauge rapidly climbs to 210 plus degrees before dropping to 180-5 and heat slowly comes from heater...Also start and idle truck for 20 plus min's in morning...temp gauge has not moved at all...only cold air from defrost/heater...start to remove psi cap just to check for pressure again ,,seems like a lot coming out and bubbles noticed too in fluid down by that bottom hose connected to res..HELP...

Last updated
Relly De Jesus
Chevy Mechanic

Hello and welcome to ExpertHelp.com! My name is Relly De Jesus and I'm going to do everything in my power to answer your question to your full satisfaction!

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Last updated
Relly De Jesus
Chevy Mechanic

Hello Terrance

How are you doing? You will have to take it in and they will replace the thermostats again. But before doing so there are points to be looked at specially the coolant light always trigger.

Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)

- Excessive white smoke or a coolant type odor coming from the exhaust pipe, along with low coolant levels, may indicate coolant in the combustion chamber. Cause Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head. Correction Perform the following diagnosis to determine the cause of the coolant loss.

External/Internal Coolant Leaks

- Verify that there are no external coolant leaks. Refer to the Loss of Coolant procedure in the Engine Cooling section of the Service Manual. If the vehicle is equipped with an Exhaust Gas Recirculation (EGR) system, inspect the EGR valve and intake system for evidence of internal coolant leakage. Replace the EGR cooler if any condition is found. Refer to Exhaust Gas Recirculation (EGR) Valve Cooler Tube Replacement procedure in the Engine Controls

- Disable the fuel system by removing the IGN 1 relay on C/K trucks or the IGN B relay on C4500/5500 trucks using the J 43244 Relay Puller Pliers. Disconnect the 4–wire glow plug control circuit connector from the glow plug relay/controller assembly. Remove the glow plugs. Refer to the Glow Plug Replacement — Bank 1 and the Glow Plug Replacement — Bank 2 procedures in the Engine Controls — 6.6L sub-section of the Service Manual. Inspect for evidence of coolant on the glow plug tips. Note any cylinders that show evidence of coolant leakage. Caution: Keep hands and face clear of glow plug holes while cranking. Hot liquid or gases may be expelled during cranking.

Cylinder Leakage

- Remove the fuel injector sleeves of the cylinders that show evidence of coolant leakage. Damage to this portion of the fuel injector sleeve may indicate a loose injector caused by improper tightening or a missing copper washer. A loose injector will allow the fuel injector and the fuel injector sleeve to bounce inside the cylinder head, resulting in coolant leakage to the cylinder. If damage is found, replace the affected components. Cylinder head or cylinder head gasket replacement will be required if worn out or damaged.

Hope this helps in giving you the insight why the coolant always fails. You may want to print this as well to let them know of the possibilities. Let's just hope that they might have gave you a factory defect thermostats and the new replacement resolves the issue for good.

Is there anything else I can add or help you with Terrance? I'll be standing by for your response.

Thank you

Relly

 

Posted
Relly De Jesus
Chevy Mechanic

Hello Terrance

How are you doing? You will have to take it in and they will replace the thermostats again. But before doing so there are points to be looked at specially the coolant light always trigger.

Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)

- Excessive white smoke or a coolant type odor coming from the exhaust pipe, along with low coolant levels, may indicate coolant in the combustion chamber. Cause Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head. Correction Perform the following diagnosis to determine the cause of the coolant loss.

External/Internal Coolant Leaks

- Verify that there are no external coolant leaks. Refer to the Loss of Coolant procedure in the Engine Cooling section of the Service Manual. If the vehicle is equipped with an Exhaust Gas Recirculation (EGR) system, inspect the EGR valve and intake system for evidence of internal coolant leakage. Replace the EGR cooler if any condition is found. Refer to Exhaust Gas Recirculation (EGR) Valve Cooler Tube Replacement procedure in the Engine Controls

- Disable the fuel system by removing the IGN 1 relay on C/K trucks or the IGN B relay on C4500/5500 trucks using the J 43244 Relay Puller Pliers. Disconnect the 4–wire glow plug control circuit connector from the glow plug relay/controller assembly. Remove the glow plugs. Refer to the Glow Plug Replacement — Bank 1 and the Glow Plug Replacement — Bank 2 procedures in the Engine Controls — 6.6L sub-section of the Service Manual. Inspect for evidence of coolant on the glow plug tips. Note any cylinders that show evidence of coolant leakage. Caution: Keep hands and face clear of glow plug holes while cranking. Hot liquid or gases may be expelled during cranking.

Cylinder Leakage

- Remove the fuel injector sleeves of the cylinders that show evidence of coolant leakage. Damage to this portion of the fuel injector sleeve may indicate a loose injector caused by improper tightening or a missing copper washer. A loose injector will allow the fuel injector and the fuel injector sleeve to bounce inside the cylinder head, resulting in coolant leakage to the cylinder. If damage is found, replace the affected components. Cylinder head or cylinder head gasket replacement will be required if worn out or damaged.

Hope this helps in giving you the insight why the coolant always fails. You may want to print this as well to let them know of the possibilities. Let's just hope that they might have gave you a factory defect thermostats and the new replacement resolves the issue for good.

Is there anything else I can add or help you with Terrance? I'll be standing by for your response.

Thank you

Relly

Posted
Customer

Hello Relly...Thank you for your information concerning my cooling system question. Today is very busy for me with early morning appointments. I will read over your info and I may give you a call later today.

Thanks again

Terry

Posted
Customer

Took truck back to dealer repair shop...went over your information with service manager...he listened, I hope...we'll see...Truck at shop...I'll let you know what they find.. Thanks Relly....terry

Posted
Relly De Jesus
Chevy Mechanic

That will be great Terry... Please don't forget to click the green ACCEPT ANSWER button if everything ends well and if you're satisfied with my assistance. Will greatly appreciate it. Let's hope for the best.

Thank you

Relly

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

How are you doing? Please let me know of the result after the dealer diagnose the issue. I'll be standing by for your response. You have a great day!

Thank you

Relly

Posted
Customer

Relly, I will let you know..

Posted
Relly De Jesus
Chevy Mechanic

Thank you ... Have a great day ahead

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

How are you doing? This is a follow up regarding my assistance. Is there anything else I can add or help you with? Let me know if it's been helpful and please keep me posted on the progress. I'll be waiting for your response.

Thank you

Relly de Jesus

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

How are you doing? This is a follow up regarding my assistance. Is there anything else I can add or help you with? Let me know if it's been helpful and please keep me posted on the progress. I'll be waiting for your response.

Thank you

Relly de Jesus

Posted
Customer

Hello Relly

The truck is at the dealers shop... I took it in last Thursday..I have heard nothing from them since I dropped it off..I will be giving them a call Monday if they do not call me..I will pass on the information from them to me to you...   terry

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry

Good to hear back from you. Let's just hope that everything ends well. I'll just be standing by and eventually will make a follow up. Have a great day Terry

Thank you

Relly

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

How's it going? any word from the dealership Terry? I'll be standing by for your response.

Thank you

Relly

Posted
Customer

Well Relly... I called them around 10:00am...The mechanic seems to be stumped concerning my complaint,, is what the S/manager told me...He seems to be thinking it's a head gasket problem, just not 100% ...So I was told they are going to do more research concerning this problem and well let me know as to what they conclude ... I am not feeling very good about all this....  terry

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry... they really need to look thoroughly that's why I gave you the causes. Replacing thermostats is easy but they really need to go deeper. It will take them some time to figure out what's causing the issue Terry. The head gasket is a possibility and replacing it can resolve the issue. 

Posted
Relly De Jesus
Chevy Mechanic

Is there anything else that you think I might add or help you with Terry?

Posted
Customer

Relly,    They believe it's a water pump issue and are going to remove parts as required for repair or replacement...I do not understand and rely on them to get it right...A question I asked concerned the pressure in the cooling system...S/manager told me this could be from the result of a faulty water pump...What can you add here Relly.?

Posted
Relly De Jesus
Chevy Mechanic

Water pump is a possibility... do you have history of water pump replacement before Terry?

Posted
Relly De Jesus
Chevy Mechanic

If you haven't replace the water pump yet then it can be two things. Water pump replacement first and if it fails it will go to head gasket replacement. There's a possibility that the thermostat won't be replaced if not damaged on the process. Once these things have been looked at you'll be good Terry.

Please let me know if there's anything else I can add or help you with. 

Thank you

Relly

Posted
Customer

The water pump has never been replaced since I've owned the truck..Approx 120000 miles on it now. Thanks for your input Relly

terry

Posted
Relly De Jesus
Chevy Mechanic

I see... reasonable enough to start with the waterpump replacement first. If it still fails then the head gasket. I believe you'll be good after this. Everything will end well

Posted
Customer

Will keep you posted...

Posted
Relly De Jesus
Chevy Mechanic

That will be great Terry. Have a good one.

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

How's it going? Anything from the dealership?

Relly

Posted
Customer

 Morn'n Relly,,,  Nothing yesterday...hopefully sum word today...It seems that changing a water takes longer than I thought..

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry... Yeah it's not that painful to replace but will really take some time. I'll be standing by. Thanks

Posted
Customer

I have the truck back...S/manager wants me to drive it a few days and check cooling system for pressure and we will go from there..It's as if he is not 100% certain a repair (waterpump) is/was the problem...I'll let you know what happens Relly..  terry

Posted
Relly De Jesus
Chevy Mechanic

That's good news... Goodluck on the test drive Terry. I'll be standing by for the result. 

Thank you

Relly

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry

How are you doing? How's the truck performing?

Relly

Posted
Customer

Hello Relly...

To be honest I have not driven my truck in the pass two days due to illness...hopefully the situation will change soon and I will have an answer to my trucks performance for you...I'm thinking Monday...

terry

Posted
Relly De Jesus
Chevy Mechanic

Alrighty Terry... Catch you on monday. Restwell ok.. Have a great day!

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry

You're doing good? Please let me know if you have driven the truck. Get well. 

Thank you

Relly

Posted
Customer

Hi Relly

I have driven the truck 64 miles. The ,low coolant lite, came on in the cab. I left message with S/manager. Then I added approx one quarter gallon anti-freeze to bring to level mark, as I require my truck for business. I will drive the truck and see if the low coolant lite comes back on. I will keep you posted about that...  terry

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry

Good to hear back from you... Thank you and good luck!

Relly

Posted
Customer

Hi Relly

Yes I too hope for my truck to perform correctly.   Let you know.   

terry

Posted
Relly De Jesus
Chevy Mechanic

Hello Terry

Let's hope for the best.... I'll be standing by. Have a nice day.

Relly

Posted
Customer

Relly,, Today I hope to drive the truck more than a few miles,,closer to 100,, This may tell me about coolant lose,, thermostats seem to be operating correctly... will tell you what happened..  terry

Posted
Relly De Jesus
Chevy Mechanic

That's great news Terry... I will be standing by.. Goodluck and take care!

Relly

Posted
Relly De Jesus
Chevy Mechanic

Hi Terry

How's it going? Hope everything is fine. I'll be standing by for your response.

Thank you

Relly

Posted
Customer

Hi Relly

I have traveled 160 miles since I last had a low coolant level warning lite come on. Hopefully it will continue in this manner. Thermostats are working and so far I've added no coolant. I really do not understand how a water pump caused this situation.

terry

Posted
Customer

Relly... I will click on the "Accept Answer" button...you should be paid for helping out...Maybe this was just an odd situation/problem to troubleshoot, or the information I gave was not enough to go on...Nobody steered me correctly here or at the Dealers as to a straight out correction and it turned out to be expensive and manys days of my truck being in the shop as well as having to bring it back for further troubleshooting/$$ and lost use for myself...I'm very much hoping the truck 'is' now repaired...   terry

Posted
Relly De Jesus
Chevy Mechanic

Yes Terry and it's been a pleasure working with you. With the situation you're in right now I believe that the truck will stay that way. You can leave your worries behind Sir. You have a good one!

Relly

Posted

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