Q: overheating issues

asked by on August 05, 2016

Hi my name is henry and I'm having a big problem I have a 1991 Chevy s10 4.3 i had a engine before this one I have now had to install a new engine cause of this issue and I'm still having the same problem no mechanic Can figure this out .my engine overheats with the ac on the engine is new the water pump hoses radiator I even installed two electric fans from summit with a shrout it only does this with the ac on without the ac on temp stays around 150 I've gone thru 7 ac compressed already the keep getting burned out at will work for a bit once the temp starts going up the account stops working also have a new condensor and a new evaporator nobody can figure out this prob it is insane u could also reach me at cuba305239@gmail.com I really really need help

Thermostat Replacement $157.20 - $759.78 Get a Quote
Pressure Test Radiator Cap $94.99 - $114.99 Get a Quote
Radiator Replacement $353.55 - $1403.40 Get a Quote

Its possible that you may have a partial blockage in the radiator. With the engine running and warm, feel the radiator (careful, it could be very hot) or use a non contact thermometer to check for cooler spots on the radiator. Sometimes a few of the passages become restricted and coolant flow simply goes around the blocked cores and flow through the other cores. If you feel any portion of the radiator is cooler than the surrounding area, you probably have a blockage. Also, make sure you have a thermostat installed, and that all air is bled from the system. Your engine needs the restriction from the thermostat to keep coolant in the radiator long enough to extract the heat efficiently. Radiator caps that do not hold the required pressure can also contribute to overheating. I suggest you have a qualified mechanic, such as one from YourMechanic.com, inspect your radiator and provide any necessary repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Driver seat broke and basically collapsed
Greetings! Thank you for writing in about this problem. The welds on the seat brackets may have broken. This seems to be a common problem in this generation of Forester. A professional mechanic from YourMechanic can diagnose what failed (https://www.yourmechanic.com/book/?mktg_jid=391)...
The oil leaked out of my engine.
First thing I would recommend to do would be to have a mechanic check to see if the hole was caused by something coming up and hitting the oil pan causing the damage and the oil leaked out causing engine...
Intermittent cylinder number four misfiring, car shakes as if it would stall
Misfiring can generally be either the fuel or it can be ignition. Now, you've changed the spark plugs. But if you have an older car, did you change spark plug coils? If not, change them. If it has coil on...
My car won't shift out of first gear at all.
Thanks for writing in about the transmission problem with your 1999 Mercedes-Benz S320. Typically the issue you're speaking about is a result of overheating inside of the automatic transmission. The overheating can be caused by dirty transmission fluid (https://www.yourmechanic.com/question/need-to-have-transmission-fluid-flushed-after-i-used-the-wrong-kind), or...
Convertible top fluid brand
Hello there. When checking the fluid, the top must be in the service position for an accurate reading. This should show the fluid level at the proper level once the top is in the service position. The bolt and washer...
Using Bar's stop leak for timing chain cover leak
Stop leak products are generally an amateur, unprofessional solution to a TECHNICAL problem. Factory Service Manuals do NOT recommend or specify stop leak products BECAUSE such products are NOT considered to be an acceptable repair strategy, save for rare exceptions....
Stuck in reverse
Hi there, thanks for writing to YourMechanic. It can be difficult to drive a vehicle with it stuck in reverse. The problem seems to be a plastic grommet that connects the gear shift assembly to the transmission. It sounds like...
My Mercedes Benz A-Class -160A start and dies
Wow! That's quite a list! It can be confusing when you get a whole library of codes like that.There are several things that can make that happen. One is if the car was operated with a dead battery. Another is...
Changed battery car won't start
See if any diagnostic trouble codes were set via the OBD-II on board diagnostics. Prior to performing diagnostics be sure you have a fully, 100% charged battery. Confirm that the engine immobilizer system (security system) is not activated thus preventing...

Related articles

4 Essential Things to Know About Tie Downs and Tow Straps
When When you need to secure cargo in the back of your trailer, truck, van, or SUV, then tie downs and tow straps are going to be your new best friend. These sturdy and dependable pieces of material will help...
The Guide to Right-of-Way Laws in Wisconsin
Vehicles Vehicles and pedestrians are inevitably going to meet in traffic, and sometimes there will be no signal lights or signs to regulate the movement of traffic. That is why there are right-of-way laws in place – to identify who...
P0801 OBD-II Trouble Code: Reverse Inhibit Control Circuit Malfunction
P0801 means an issue with the reverse inhibitor switch making the vehicle unable to be placed in reverse or capable of doing so while driving forward.