Coolant circulation

Tiny
JAMESEDWARD
  • MEMBER
  • 2004 DODGE RAM
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 2,350,000 MILES
My truck won't start due to a bad fuel pump, but does water circulate through the motor while trying to start my truck?
Thursday, February 3rd, 2022 AT 11:40 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The coolant will circulate anytime the water pump is turning. So will have some circulation during startup but it will be very low, the actual flow will happen after the engine has been started and the impeller of the water pump is spinning as the belt it is turning the water pump pulley.

https://www.2carpros.com/articles/water-pump

Let me know of any questions or concerns.

Thank you.
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Thursday, February 3rd, 2022 AT 1:17 PM

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