Engine overheating?

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check if low on coolant and if so suspect and check lower intake manifold
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
NORAMAE
  • MEMBER
  • 1 POST
  • 2002 CHEVROLET VENTURE
The temp guage on my 2002 chey venture says that its overheating. I have changed the thermastat, and the water pump. Also the heater just stop working.
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
If it is overheating and the heater stopped working look for a blockage. Most times I suggest back flushing the system, getting the old coolant and cleaning the system. Take the thermsatat out first. Kits to clean out the collant system are sold at local automotive stores. After you have cleaned out the system and reinstalled the thermstat then fill with water. Make sure the thermastat is in correctly with the spring pointing into the engine. Fill the system with water and start it up. Let it run, you will see when the thermastat opens the fluid will drop down. Check the temp and the heater. If the temp is in the normal range. Most times overheating is from a bad thermastat, a clogged radiator or clogged heater core.
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+1
Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2002 CHEVROLET VENTURE
  • 84,300 MILES
Need advice regarding repair or replace?
Van is 10 yrs, 84300 miles. Just spent $3000 on repairs, now its overheating & being towed to mechanic. Found 6 recalls, already paid for, did not know about recalls. How to get money back? Help with making decision to keep or replace.
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
GMTECH
  • MECHANIC
  • 537 POSTS
If you have paid for the recalls, GM should pay you back. I would call GM customer service on that. I guess if it is a head gasket that will cost a lot more money
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
GIRLFRIEND795
  • MEMBER
  • 1 POST
  • 2002 CHEVROLET VENTURE
Engine Cooling problem
2002 Chevy Venture 6 cyl 128500 miles

i had an intake gasket down and my car still overheats, why?
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Did you have the intake replaced? You may have air in the cooling system causing air pocket in the the anitfreeze causing it to overheat. Have it checked right away before you crack the cylinder heads
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
JEDIKNIGHT2
  • MEMBER
  • 18 POSTS
Because it probably was a head gasket. The gaskets SUCK on Ventures. At least until you replace them with the ones GM had to redesign.
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
RUSSEL FINEHOUT
  • MEMBER
  • 2 POSTS
  • 2002 CHEVROLET VENTURE
  • 3.4L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 134,000 MILES
Last April my van overheated it was the thermostat. I did an overhaul and replaced all the tubes, water pump, temperature sensor, sending unit, and thermostat. After this it was still overheating and I noticed I had bubbles in my overflow tank. I changed the head gaskets the bubbles went away and it seemed to be doing better for about a day.
The van was still getting hot 200°f-250°f. I could run the heater and it would cool down fairly easily and it seemed to heat up the most at highway speeds so this lead me to believe it was also a clogged radiator. This last weekend I put in a new radiator and thermostat (to be safe) and I am having The same issues.
The van operates at highway speeds at 203°f at a 60° ambient air temperature and 212° At 90° ambient air temp. At road speeds (35-45 mph) 198°f at both 60° and 90° ambient air temperature. My father in law is insistent that you cannot mix max strength dex-cool and distilled water 50/50 when adding new coolant. Which is what I did after changing my head gaskets. Is this the case and do I just need to get my system flushed and refilled to fix this issue?
Anything helps, thanks.
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
All antifreeze whether it is dex- cool or glycol should be at a 50/50 mix especially with aluminum because it etches away the metal if stronger. Your temperatures seem to be fairly normal except for the 250 which is on the hot side. Check the radiator cap as it may not be holding enough pressure. Remember coolant on an engine is under pressure so what may seem hot is where it is supposed to be. If it continues at 250 then there may be a partial blockage in engine maybe.
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Friday, August 21st, 2020 AT 11:47 AM (Merged)
Tiny
RUSSEL FINEHOUT
  • MEMBER
  • 2 POSTS
Also have replaced the radiator cap. Forgot to add that. Would a flush possibly help clear a blockage? And in the Phoenix summer it tends to run a little hotter at what point should I be concerned temperature wise?
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Friday, August 21st, 2020 AT 11:48 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it stays at 250 then be concerned. I am not sure that a flush will help, but if you do go that route get something like radiator cleaner and not flush. Also, check radiator for cold spots when hot/warm if you feel any cold spots it is not working. Also are your fans kicking on as well? When you turn your A/C on at least one should work. That is also another problem child at low speeds/idling.
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Friday, August 21st, 2020 AT 11:48 AM (Merged)
Tiny
BEANJ00
  • MEMBER
  • 1 POST
  • CHEVROLET VENTURE
I bought a 2002 Chevy Venture used with 94,000 k. I had put about 6,000 k on it when I was driving on the highway and it over heated. I shut the van off and about 2 hours later I had to drive the vehicle 3klm to a service station while it was over heated.

The vehicle was 3 liters low in coolant and the head gaskets where gone. The station said it was very rare to see this in such a new vehicle with low kilometers. Anyway, I was worried about the long term affects of my engine now that it had over heated and I had to drive 3 kilometers with the engine in this state. Can you tell me what I may expect in the future with this vehicle?
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Friday, August 21st, 2020 AT 11:48 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be an early cylinders wear and tear and engine bearing failures. It depends on the circumstances.

Just make sure they find out why the headgasket got blown away.
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Friday, August 21st, 2020 AT 11:48 AM (Merged)
Tiny
ED ARMES
  • MECHANIC
  • 129 POSTS
3.4 is prone to head gasket failures and/or intake gasket failures. I have seen several of these includeing my own in the past year. GM has new design on these gaskets. Mine were replaced last year and I have no problems. These heads are aluminum and will probably need to be milled when they are removed. As they warp when over heated. If they are not checked for warpage, they me start to leak again. If your engine is still quiet and you change your oil on schedule, you are probably in the clear.
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Friday, August 21st, 2020 AT 11:48 AM (Merged)
Tiny
TEACH59
  • MEMBER
  • 1 POST
  • CHEVROLET VENTURE
2002 chevrolet venture 3.4 L engine, 60000mls
the temperature gauge rises rapidly close to the red range and then drops back to the normal range
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Friday, August 21st, 2020 AT 11:57 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Start by replacing the thermostat and flush the engine cooling system. Don't work come on back, I'll give you detail instructions is how to locate the problem.
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+2
Friday, August 21st, 2020 AT 11:57 AM (Merged)

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