Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Temperature gauge not registering when motor is warm/hot…

Temperature gauge not registering...

Temperature gauge not registering when motor is warm/hot radiator fans working, radiator fluid pushed to reservoir (no fuel smell in reservoir), no heat to interior/heater-core, no visible leaks.

Mechanic's Assistant: How old are the hoses? And just to clarify, can you actually see the leak?

No leak

Mechanic's Assistant: What is the model/year of your Chevy?

2004 impala3.8L

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes what I sent you is what I checked

Show More
Show Less
Ask Your Own Chevy Question
Answered in 5 minutes by:
3/6/2018
Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified

Is there any coolant in the engine? Have you removed the radiator cap at any point? (Do not remove the cap if the engine is hot.)

Ask Your Own Chevy Question
Customer reply replied 4 months ago
38; yes

OK, do you have a scan tool that will read data?

Ask Your Own Chevy Question
Customer reply replied 4 months ago
no

OK. The notion there would have been to see if the engine computer is reading the coolant temp, but the gauge isn't responding, or something like that. At this point, we don't know if it's a bad gauge, bad temp sensor, etc.

If there is no heat, I would investigate that as a symptom. Either the heater core is restricted/clogged up, or it is air bound. If it's air bound, it's likely that you have a head gasket failure, that's causing all of these problems. I like to use a chemical test for head gaskets, called a block check. It simply tests for the presence of combustion gases in the cooling system, if the fluid turns color, you have a head gasket issue. I would have this test performed or do it yourself, the tester kit is about $40 and comes with instructions for use.

All of your symptoms combined point to head gasket, even the coolant temp reading, since the sensor won't read if it's not submerged in coolant. If you have a big air pocket in your engine due to a head gasket failure, you'll get these funky readings and symptoms.

Please take a moment to rate my answers using the stars at the top of the page, that's how I get compensated. If you need anything else, let me know, I'm happy to follow up.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
When you say head gasket you are referring to the Intake Manifold or Plenum gasket then?

No, the cylinder head gasket is between the cylinder head and the engine block, on both sides. A considerable amount of work to replace. For the most part, you can't get combustion gases in your cooling system from anywhere other than a head gasket or cracked engine component in that area.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
I see, so the cars computer should be detecting the cylinder compression loss then which I can have tested at Autozone for example, correct?

No. The amount of compression lost won't be counted as a misfire by the scan tool, it's unlikely that you'll have a trouble code that points to it, unless it's also ingesting coolant and causing the spark plug to foul.

The block check tool I mentioned before is the go to tool on this issue. The car's computer system likely won't report anything to do with the problems you're having.

Ask Your Own Chevy Question

Did you get this worked out?

Please take a moment to rate my answers by clicking the stars at the top of the page, that's how I get compensated. If you need anything else, let me know, I'm happy to follow up.

You will also have an opportunity to add a tip to the payment if you wish, and that is greatly appreciated. I work very hard to make sure you're getting the very best information I can provide for you.

Ask Your Own Chevy Question

Please take a moment to rate my answers using the stars at the top of the page, that's how I get compensated. Let me know if you need anything else, I am happy to follow up.

Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified
Jerry Newton and 87 other Chevy Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Jerry Newton Your Own Question
Jerry Newton
Jerry Newton
Jerry Newton, Chevy Technician
Category: Chevy
Satisfied Customers: 5,694
5,694 Satisfied Customers
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Jerry Newton is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,659 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,621 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,948 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,822 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
MY TRAIBLAZER IS OVERHEATING. I HAVE CHANGE, RADIATOR, RADIATOR PLUG, FAN CLUTCH, HOSES,WA
MY TRAIBLAZER IS OVERHEATING. I HAVE CHANGE, RADIATOR, RADIATOR PLUG, FAN CLUTCH, HOSES,WATER PUMP AND THERMOSTAT. WHT IS NEXT. THANK YOU… read more
BigBob
BigBob
Service Manager
High School or GED
2,846 satisfied customers
Chev Tahoe: 200 tahoe. 2 zone heat and cooling system. Front
200 tahoe. 2 zone heat and cooling system. Front blows only cool air with no heat. The back systemdid work but now the fan won't work.… read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
2004 Tahoe: how long car idles or driven at low speeds
2004 Tahoe. Heater has worked well for up until a week ago. Now it does not warm up regardless of how long car idles or driven at low speeds. On the highway, the heater finally starts to blow hot air.… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
Chevrolet Venture: i got a chevy ventura 2001 6cyl 3.4l everything
i got a chevy ventura 2001 6cyl 3.4l everything got power and working fine but the fans not coming on?… read more
Tim&#039;s Auto Repair
Tim's Auto Repair
mechanic
High School or GED
8,884 satisfied customers
2003 Chevy Impala: climate control problems..passenger side..heater
I've got a 2003 Chevy Impala that has been having climate control problems for about six months or so. Over the past summer, the A/C would work intermittently, and occasionally on the passenger side, … read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
heads..it runs good, but i am having a problem with the cooling
will 2000 4.3 heads work on 1998 4.3 i have them on there now and it runs good, but i am having a problem with the cooling… read more
Matt J
Matt J
Owner of Jones Automotive
Vocational, Technical or Trade Scho
1,000 satisfied customers
Coils..hood..it flowed freely so I dont have a clogged heater core
the heater on my 2000 S-10 doesnt heat at all..i removed the 3 screws that hold the temp coils on top of the heater box under the hood and removed it to see if the air dirverter was moving as I change… read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
2004 chevy: heater blows cold air after warming...any
2004 chevy 1500,heater blows cold air after warming up for twenty minutes,then blows hot air then goes cold again.any ideas… read more
VirtualWrench (L J)
VirtualWrench (L J)
Owner of LJ Auto Repair 37 years
Associate Degree
38 satisfied customers
replace the thermostst and water pump top hose became warm. gauge
replace the thermostst and water pump top hose became warm. gauge when up above 180 once still no heat. what is next on the trouble-tree to shoot? Car is a s-10 1996 Blazer.… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
2004 CHEVY: fuses, the temperature gauge reads..antifreeze for leaks
heater doesn't work, no heat, replaced the thermostat, checked the fuses, the temperature gauge reads normal, check heater core and do not smell any antifreeze for leaks? wht do i have no heat, remove… read more
Scott
Scott
GM Master Technician
Associate Degree
220 satisfied customers
1998 chevy: litre..cab..the engine never reaches operating temperature
I have a 1998 chevy k1500 with 5.0 litre motor. My cab heat is warm at best and the engine never reaches operating temperature. I have checked the coolant levels and they are fine as well as change th… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
1996 corvette. the air conditioning stays on. I can not get any heat.
I have a 1996 corvette. the air conditioning stays on. I can not get any heat. The unit will cycle from different vents when buttons are pushed. When I change the temp the a/c stays on. I replace the … read more
Triston
Triston
High School or GED
1,134 satisfied customers
02 Trailblazer - Replace clutch fan, Replaced water pump, thermostat
02 Trailblazer - Replace clutch fan, Replaced water pump, thermostat working fine, radiator not clogged, Still overheating. Any suggestions?… read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
automatic..temp gauge reads 192-196 degrees..overheating..thermostat
I have a C4 19925 automatic LT1. when driving the temp gauge reads 192-196 degrees but if I stop at a light it jumps right up to 212 to 218. At the higher temperatures It smells like it';s overheating… read more
GMTechBernard
GMTechBernard
Owner / Technician
High School or GED
1,644 satisfied customers
2000 Blazer: temperature gauge..me to flush the heater core..hose
My fiance's 2000 Blazer's heat isn't working at all and the temperature gauge isn't quite reaching half way. A mechanic friend told me that the thermostat is probably frozen open and that I should cha… read more
Matt J
Matt J
Owner of Jones Automotive
Vocational, Technical or Trade Scho
1,000 satisfied customers
Camaro: temp gauge..V6 keeps going to the 3/4 line..traffic..freeway
The temp gauge on my camaro 3.4l V6 keeps going to the 3/4 line. Does not matter if in traffic or driving in the freeway. Noticed temp will go down as soon as the fan kicks in but keeps going up again… read more
FixUrNissan
FixUrNissan
Shop Forman / Lead Tech / Parent
Vocational, Technical or Trade Scho
1 satisfied customers
Chevy: 2000 Silverado..350 engine..The A/C only has 1 temperature
I have a Chevy 2000 Silverado with a 350 engine. The A/C only has 1 temperature. Freezing cold! The fan speeds all work as normal but no heat at all and no temp control for A/C, just cold as it can be… read more
Scott K
Scott K
Automotive Instructor
Vocational, Technical or Trade Scho
1,330 satisfied customers
1993 Chevy Lumina: radiator..coolant leaks out of hose near the top
1993 Chevy Lumina 3.1 has no heat, radiator full. After warm up coolant leaks out of hose near the top of the engine, probably pressure build up? I don''t know what the hose is but there is another on… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x