fan always on
#1
Registered User
Thread Starter
Join Date: Mar 2004
Location: Sacramento
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
fan always on
Ive noticed lately that my fan stays on a lot. i thought it was the fan clutch but i replaced it and it still does it a little. is this because of the sacramento heat (usually about 90-100) and my cooling system needs maintenence i.e. new coolant or something else?
#4
Mine's running a lot too this time of year, it's normal. Does anyone know of a way to disable the clutch fan? It seems like if I were to find the wire that tells it to spool up I could put a switch on it and turn it off when I needed to. Anyone know where to look?
#7
Registered User
Join Date: Aug 2003
Location: Mountains outside of Boulder
Posts: 613
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by ChickenLover
That figures. When that thing engages it feels like it robs half my HP. How does it know when to engage itself?
note: since both the water pump and the fan are driven by the same shaft, it's usually a good idea to replace both at the same time, otherwise there can be extra vibrations that cause premature wear.
Last edited by mike_d; 08-10-2004 at 06:05 AM.
Trending Topics
#9
Registered User
Join Date: Aug 2004
Location: Buenos Aires, Argentina
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by mike_d
...the radiator gets hot, the heat from the radiator gets transferred to the fan clutch, the viscosity of the oil increases, and the fan turns on.
#10
Registered User
Join Date: Aug 2003
Location: Mountains outside of Boulder
Posts: 613
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by pedro_arg
Just one question: When the engine has not been used for some hours, i.e. its cold, is the fan supposed to turn freely? Tried to turn mine around today and still seamed to be somehow engaged.
try this: when the engine is cold, try to turn the fan. then warm up the engine to operating temperature and then shut it off. the fan will be harder to turn. (this is the classic way to diagnose fan clutch problems)
the silicone is still fairly viscous when cold, so there will always be a little coupling of the fan to the drive (the fan clutch is never at 0% or 100%, but somewhere in between depending on engine temp). also, i've noticed that when you first start the engine, even if it's cold, the fan will turn for about 10-20 seconds or so. my guess that when nothing is spinning the oil is a little more viscous so the fan will start spinning with the engine and then it'll start breaking up the oil molecules and go back to normal operation.
#11
Registered User
Join Date: Aug 2004
Location: Buenos Aires, Argentina
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by mike_d
yes and no.
try this: when the engine is cold, try to turn the fan. then warm up the engine to operating temperature and then shut it off. the fan will be harder to turn. (this is the classic way to diagnose fan clutch problems)
try this: when the engine is cold, try to turn the fan. then warm up the engine to operating temperature and then shut it off. the fan will be harder to turn. (this is the classic way to diagnose fan clutch problems)
Thread
Thread Starter
Forum
Replies
Last Post
kawazx636
The Classifieds GraveYard
34
10-06-2021 03:03 PM
runnermedic
95.5-2004 Tacomas & 96-2002 4Runners
13
09-21-2015 05:20 PM