top radiator hose is 162°F the bottom hose is 75°F?

2013 DODGE RAM
173,000 MILES • 4.7L • V8 • 2WD • AUTOMATIC
Avatar
JOE1953
  • MEMBER
  • 772 POSTS
the top radiator hose is 162°F, the bottom hose is 75°F, the heater hose is 158°F and I use my scan tool to check engine temperature, and it read 199°F are theses number acceptable? I believe the heater hoses have been bypassed from the heater core and I can't find the end of the heater core to connect them back up.
Jan 21, 2025 at 4:14 PM
Advertisement
Avatar
STEVE W.
  • CERTIFIED EXPERT
  • 15,113 POSTS
Those numbers are okay. If the heater core is bypassed it likely has a leak. I would get a cooling system pressure test kit and adapt it with some hoses to connect to the heater core. Then pressure test it to see if it leaks down. The heater core connections come through the firewall on the right side almost in line with the cylinder head on the engine.
Jan 21, 2025 at 9:45 PM
Avatar
JOE1953
  • MEMBER
  • 772 POSTS
I don't understand the Terms of Service and Privacy Policy.
Jan 22, 2025 at 12:54 AM
Advertisement
Avatar
STEVE W.
  • CERTIFIED EXPERT
  • 15,113 POSTS
I'll notify the folks who run the site about that. I only answer automotive related questions.
Jan 22, 2025 at 8:10 AM
Avatar
JOE1953
  • MEMBER
  • 772 POSTS
I found where the heater hoses connected to the heater core. how do I replaced the heater core?
Jan 25, 2025 at 6:29 AM
Avatar
STEVE W.
  • CERTIFIED EXPERT
  • 15,113 POSTS
Heater core replacement on that truck involves stripping out the dash so that you can get to the HVAC case and remove it, then the core is easy to replace.

As I noted here.
https://www.2carpros.com/questions/heater-core-97404367
Jan 25, 2025 at 7:14 AM
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
what about them do you not understand?

Terms of Service and Privacy Policy?

Jan 26, 2025 at 2:02 PM