Overheating replaced the fan motor and relay?

Tiny
SKOOTER28
  • MEMBER
  • 2008 HONDA CIVIC
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I have replaced the fan motor and relay and temperature sensor and head gasket thermostat and water pump and all and car still overheats when at a stop sign.
Tuesday, June 24th, 2025 AT 10:33 AM

8 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,149 POSTS
Yep, I would swap out the radiator, it sounds like it has blockage either internally or externally. This guide can help:

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

Before you take it apart, I would do a chemical test to make sure you don't have a cracked block. Please go over this guide as well:

https://www.2carpros.com/articles/head-gasket-blown-test

Please go over these guides and get back to us.
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Wednesday, June 25th, 2025 AT 11:12 AM
Tiny
SKOOTER28
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But when driving it doesn’t overheat. What happens is when it gets hot the fan kicks on then right after it shuts off before it cools down.
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Wednesday, June 25th, 2025 AT 11:27 AM
Tiny
KEN L
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So when it gets hot the radiator fan kicks in and then it cools down?
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Wednesday, June 25th, 2025 AT 6:15 PM
Tiny
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  • 98 POSTS
When the temperature gets hot the fan kicks on but doesn’t stay on long enough to cool car down pretty much it kicks on for a little bit then cuts right off and car will over heat if I’m stopped but if I’m driving it doesn’t overheat I’ve replaced the fan itself and everything with it relay switch and everything else I named them the last thing I replaced was the temperature sensor thinking that was it but it still does it.
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Wednesday, June 25th, 2025 AT 6:18 PM
Tiny
KEN L
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Okay, I got it, since you replaced the major players in the system the only thing left is the PCM. You can get a preprogrammed unit by searching Google or Ebay which should fix the problem. The only other thing I can think of is that the engine was a cracked block. Did you do the chemical test?
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Thursday, June 26th, 2025 AT 8:56 AM
Tiny
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I replaced the head gasket everything was good with that.
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Thursday, June 26th, 2025 AT 8:59 AM
Tiny
SKOOTER28
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How do you do the chemical test?
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Thursday, June 26th, 2025 AT 8:59 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,149 POSTS
This is how:

https://www.2carpros.com/articles/head-gasket-blown-test

Please go over this guide and get back to us.
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Thursday, June 26th, 2025 AT 9:53 AM

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