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I have a 2004 venture. Problem on hand is no heat. Replaced

Customer Question
Customer: My name is***** have...
Customer: My name is***** have a 2004 venture. Problem on hand is no heat. Replaced the thermo at first and then the water pump by friend mechanic. It seemed it worked but then after 3 to 5 ***** *****, heat is gone.
JA: Thanks. Can you give me any more details about your issue?
Customer: Engine temp seems fluctuating. It goes over heated and settled down to normal. Then comes back again ... the overheat temp and no heat. Friend mechanic now has the impression bad head gasket. He suggested changed the engine(119,000 ***** *****). Cheaper this way than put new gasket. Is he right?
JA: OK got it. Last thing — Chevy Mechanics generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.Category: Chevy
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Answered in 54 minutes by:
1/13/2016
Chevy Mechanic: BOBBYSS, Master Technician replied 1 year ago
BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17,516
Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH
Verified

Hello, my name is Bobby. Thank you for the question. If it ha a blown head gasket then that will cause the temperature to fluctuate and can cause air to enter the heater core and keep the heater from working. If it is a head gasket it is always cheaper to replace the gaskets instead of the entire engine. You are typically looking at about a $1000-2000 difference. I hope this helps. If you need more help please let me know.

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Customer reply replied 1 year ago
Hi, Bob, thanks for the reply. So you think it's a head gasket thing after replacing the thermo and water pump to cause this "no heat issue and engine temp fluctuations " issues?
Chevy Mechanic: BOBBYSS, Master Technician replied 1 year ago

that is what it sounds like to me as it is common in this engine. I typically perform a block test first to verify this. Any shop can do this test.

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Customer reply replied 1 year ago
If its confirm head gasket is the cause, what can you say about blue devil sealant?
Chevy Mechanic: BOBBYSS, Master Technician replied 1 year ago

That and the Bars Leak with carbon fiber are decent quick fixes but they are not long term.

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Customer reply replied 1 year ago
Ok, I have a dealer mechanic appointment this friday...will let you know how it goes..
Chevy Mechanic: BOBBYSS, Master Technician replied 1 year ago

Let me know if I can be of further assistance. Have a great rest of your day. Please rate my service when you have time also. Thank you.

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BOBBYSS
BOBBYSS
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17,516
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Experience: ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH

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