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Fan Shroud question

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Old May 18, 2013 | 09:11 PM
  #1  
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Fan Shroud question

I am wondering about the plastic fan deflector that sits on top of the fan shroud - it is the one you need to remove to change the serpentine belt. I broke mine when I was changing the serp belt and just recently replaced it, but I was wondering if it is necessary. It looks like it might deflect some fan air on to the alternator, other than that, I am not sure what it does. I had it off for a month without any trouble. I noticed that my friend did not have his - he said it annoyed him years ago so he ditched it ( He also ditched the driver side battery shield/cover).
 
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Old May 18, 2013 | 09:19 PM
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Originally Posted by Sullid01
I am wondering about the plastic fan deflector that sits on top of the fan shroud - it is the one you need to remove to change the serpentine belt. I broke mine when I was changing the serp belt and just recently replaced it, but I was wondering if it is necessary. It looks like it might deflect some fan air on to the alternator, other than that, I am not sure what it does. I had it off for a month without any trouble. I noticed that my friend did not have his - he said it annoyed him years ago so he ditched it ( He also ditched the driver side battery shield/cover).
You hit that right on it does deflect air. A hot alternator does not charge as well
and the diodes really don't like excessive heat. You can get away with it out for
a while if your not charging hard or in high temps.
I did a little test with a non-contact thermometer and I was seeing 150F in under
1 minute at the armature. They heat up FAST.

Sean
 
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Old May 18, 2013 | 09:23 PM
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Cool - I want to protect my new alt (XP 270). My buddy has dual alternators and a HUGE stereo set-up - he probably ought to put the deflector back.
 
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Old May 19, 2013 | 09:11 AM
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Speakin of fan shrouds, in process of putting my truck back together to see if it runs. I understand the shroud should be on for numerous reasons but can you start the engine and drive short distance w/o the shroud on?
 
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Old May 19, 2013 | 12:10 PM
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I would say yes as long as nothing falls back on the fan ( ie radiator, bottom halve of shroud etc).
 
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Old May 20, 2013 | 08:45 PM
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My shroud has been missing for quite some time. The only problem is that it is too damn easy to access the belt.
 
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Old May 20, 2013 | 08:58 PM
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I've been running without for years, and on multiple trucks.

They don't need to be there...
 
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Old May 20, 2013 | 09:37 PM
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I don't know how much air they deflect - I was wondering if maybe they are there as a safety feature - they do keep your hands away from the belt. I agree that it was quite nice when it was not there - so easy to change out an alternator or serp belt.
 
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Old May 20, 2013 | 09:39 PM
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Lots of room.

 
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Old May 21, 2013 | 06:47 AM
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Lots of room alright seeing as how your missing the whole stator. LOL
 
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