Upper Rad hose pressure

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May 21, 2019 | 12:24 PM

#11

BiliTheAxe

Senior Member

Joined: Mar 2018

Posts: 302

It should not be, one fan should only come on when the temperature hits a certain point, or in some cases when you turn the A/C on.

May 22, 2019 | 08:46 AM

#12

djetelina

Senior Member

Joined: Aug 2010

Posts: 151

Quote:

Originally Posted by ChuckD82

I noticed that the fan on the driver side of the shroud does not kick on right away! Are they both supposed to kick on at the same time or are they independent from one another? I have to tap the fan for it to even kick on. Would that be part of the pressure build up issue?

The coolant fans on Pacifica's are wired in parallel. They should kick on/off and run at the same speed (they are variable speed), if they don't it is time to R&R. I have gone thru quite a few failed electric fan motors, never had any blow the radiator hose off..

Last edited by djetelina; May 22, 2019 at 08:48 AM.

May 22, 2019 | 08:04 PM

#13

sivitec

Member

Joined: Oct 2009

Posts: 38

From: Pasig City, Philippines

Sharing almost situation as pressure is building up on the coolant reservoir. I thought it was the thermostat. It turned out to be the driver side fan intermittently kicks in and/or if it kicks in, the RPM is not enough. It turned out that the fan motor is at fault already and I just changed it. Now cooling system is back to normal.