Overheating

2005 HONDA ODYSSEY
159,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
Avatar
AFLORES1904
  • MEMBER
  • 2 POSTS
I sealed what seamed to be a leak in the top of radiator after engine was overheating. I also changed out only three of the six spark plugs that were misfiring, changed the top hose connected to radiator, and refilled all fluids.
Now on idle the engine will heat up to the H on temperature gauge, but driving with the heater on, it will stay cool. I turned the car on with out the radiator cap and there is no water flow visible.
It was recommended that it could be water pump, etc., lalala. I need some advice, please advise.
Aug 8, 2018 at 9:31 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good afternoon.

The first thing I would consider is the thermostat. If it is stuck shut, there will be no circulation at all.

Does the cooling fan work when it gets hot? If it is not, no cool air is being drawn in to cool off the radiator.

Roy

https://www.2carpros.com/articles/engine-overheating-or-running-hot

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

https://www.2carpros.com/articles/how-an-engine-thermostat-works
Aug 8, 2018 at 10:09 AM
Avatar
AFLORES1904
  • MEMBER
  • 2 POSTS
Okay, so AC fan kicks in while AC is on and the cooling fan kicks in after the van is turned off. I can hear boiling sound in the hose. Would replacing the radiator help resolve issue or is the issue way before that? I could change out the thermostat but how could I check to see if it is the water pump too (which is not a DIY job for me anyways).
Aug 8, 2018 at 10:43 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
I would start with the thermostat first as I stated. That may be the entire issue.

Thermostat Replacement:
1. Make sure you have the anti-theft codes for the radio and navigation system, then write down the customer's radio station presets and XM radio channel presets. Make sure the ignition switch is off
2. Disconnect the negative cable from the battery first, then the positive cable.
3. Remove the battery.
4. Drain the engine coolant.


imageZoom/Print


5. Remove the thermostat cover, then remove the thermostat.
6. Install the thermostat with a new rubber seal.
7. Install the battery. Clean the battery posts and cable terminals with sandpaper, then assemble them and apply grease to prevent corrosion.
8. Refill the radiator with engine coolant, then bleed air from the cooling system.
9. Clean up any spilled engine coolant.
10. Reset the power window control unit.
11. Enter the anti-theft codes for the radio and the navigation system, then enter the customer's radio station presets and XM radio channel presets.
12. Set the clock.
Image (Click to enlarge)
Attached Media
Aug 8, 2018 at 12:10 PM