Fan ?

Reply Subscribe

Thread Tools

Search this Thread

Dec 10, 2012 | 10:10 PM

bakerbuilttracks

Thread Starter

Elder User

Joined: Sep 2008

Posts: 996

Likes: 0

From: TALLAHASSEE FL

Fan ?

So i did the Coolant filter last friday it went good and looks real good. So i fired it up after it sat all day and while it was idling it sounded like the fan was running. Honestly i can't say I've ever noticed it running while at idle or I've just over looked it.
Standing in front of the grill with the hood closed i can hear what sounds to be he fan running , like its pulling air. Im not real sure as i stated that I've ever noticed it running before but it was noticeable to me at this time.

Is there a good way to check it. I read a article on using a timing light and stuffing rags around the radiator and condenser, running it to ot and so on. Is this the only way to check? If not let me know.

If it is Shot and running all the time, what will i be hurting or do i need to replace asap

Dec 10, 2012 | 11:25 PM

bly8397

Senior User

Joined: Nov 2012

Posts: 101

Likes: 0

From: Knoxville, TN

Forgive me if I'm wrong, but are you talking about the fan on the water pump? It's mechanical, and will run when the engine is running.

Dec 10, 2012 | 11:50 PM

PaysonPSD

Post Fiend

Joined: Nov 2007

Posts: 9,549

Likes: 14

From: Payson, AZ

The fan clutch is a viscuous couipling and until the fan clutch is locked up mechanically it will spin at less rpms than the pulley. Fan clutch lock up should happen at an under hood temp (especially in the area right around the fan clutch) of approximately 220°. If you think the fan is locking up at temps below about 210° it might indicate a faulty fan clutch or a fan clutch that is permanently locked up.

You never really notice the noise it makes, until it locks up. Then it is real loud.

Dec 11, 2012 | 12:02 AM

A/Ox4

9 ECHO 1

Joined: Aug 2009

Posts: 12,467

Likes: 58

From: Missouri

Do you have an aftermarket trans temp gauge? My clutch fan kicks in at 190* trans temp everytime. The coloration is that the ATF is also cooled through the radiator. I'm sure you could create scenarios where the two would be further apart, but on hot days here, or when towing, my trans temp will creep up to 190* and then the fan will kick on. This was even more prevalent when I was having problems with my cooling system. Back then my cooling system wasnt keeping up with the demand, and thus heating my trans fluid too, even on normal days when not towing. Its not fool proof, but I can expect my fan to click on when the trans needle stands straight up.

Dec 11, 2012 | 09:47 PM

bakerbuilttracks

Thread Starter

Elder User

Joined: Sep 2008

Posts: 996

Likes: 0

From: TALLAHASSEE FL

Quote:

Originally Posted by A/Ox4

Trey, my tranny temp is monitored through my edge evo which plugs into the OBDII port. Its digitally displayed. My trans fluid dose not run the the rad. Im in north central FL " Tallahassee" its been in the upper 70s here dousing the day. As i stated it seems to be running as soon as i start it up in the morning after sitting all night. So its NOT hot its cold...... Everything trans fluid , oil, and coolant. Its not on 100% sounds like its running about 20%

Dec 11, 2012 | 10:07 PM

bakerbuilttracks

Thread Starter

Elder User

Joined: Sep 2008

Posts: 996

Likes: 0

From: TALLAHASSEE FL

Quote:

Originally Posted by PaysonPSD

Ive had it lock up. It normally happens in the summer on my way to the track pulling my trailer at the same spot everytime. And your right ...... its loud. But its not running 100% when i start it up in the morning. It almost seems like its running like at 20 - 30%. Just seems louder at idle in the mornings but its defiantly not fully engaged. I can hear it pulling air at idle more than normal it seems.

Dec 12, 2012 | 08:46 AM

MTalley

More Turbo

Joined: Jul 2011

Posts: 594

Likes: 5

From: Full-time RV

Mine locks up when it is started cold and will kick in and out for a couple minutes after starting to drive. Operates normally, otherwise (heard it kicking in this fall when I was pulling my fiver home in near-100 degree weather).

The other day, in 70-ish weather, engine cold, I started it up and let it idle for a while to get temps up so I could hook up AE and take some measurements. I could randomly hear the fan "kick in" and make more of a roaring sound, then drop back out. Climate control was set to "Off", so it wasn't A/C related.

As long as it drops out, but kicks in under really hot conditions, should be OK.