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

JOE1953

MEMBER
2013 DODGE RAM
4.7L
V8
2WD
AUTOMATIC
173,000 MILES

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.

Tuesday, January 21st, 2025 AT 4:14 PM

6 Replies

STEVE W.

MECHANIC
15,233 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.

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Tuesday, January 21st, 2025 AT 9:45 PM

JOE1953

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793 POSTS

I don't understand the Terms of Service and Privacy Policy.

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Wednesday, January 22nd, 2025 AT 12:54 AM

STEVE W.

MECHANIC
15,233 POSTS

I'll notify the folks who run the site about that. I only answer automotive related questions.

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Wednesday, January 22nd, 2025 AT 8:10 AM

JOE1953

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793 POSTS

I found where the heater hoses connected to the heater core. How do I replaced the heater core?

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Saturday, January 25th, 2025 AT 6:29 AM

STEVE W.

MECHANIC
15,233 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

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Saturday, January 25th, 2025 AT 7:14 AM