1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Fan Noise

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Old Jun 5, 2006 | 09:57 AM
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Fan Noise

should i hear my fan roaring between shifts? i don't hear it at 60 and in 5th gear
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Old Jun 5, 2006 | 10:15 AM
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If its running you haven't really got a problem, if it starts sounding like its grinding you can expect a failure otherwise fan sounds are good sounds,
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Old Jun 5, 2006 | 10:41 AM
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Yes That Is What It Does
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Old Jun 6, 2006 | 12:36 PM
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One of my GSLs made fan sounds a little like standing behind a jet liner at an airport, even at idle. Turned out to be a combination of the fan clutch being stuck and the fan shround not being properly mounted. A new fan clutch should fix the problem and check to be sure the shrouds that control the air flow are mounted correctly.

Ray
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Old Jun 6, 2006 | 01:12 PM
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when the rpm's go up you should hear the fan clutch that is the best part about a 1st gen
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Old Jun 6, 2006 | 01:29 PM
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Originally Posted by PATZ
should i hear my fan roaring between shifts? i don't hear it at 60 and in 5th gear
If you gave more details of when this happens, we could get a better idea if this is normal noise or if the fan clutch is going out.

With enough air through the radiator, i.e., speed, the fan free wheels. On the other hand, if you are driving on a warm day in stop and go city driving, the fan clutch is locked and and doing it's job.

Not hearing the fan at 60 mph in 5th gear may be because the other noises are louder than the fan and you can't hear it.

I have the same problem with my 2000 van, The fan is very noisy when first starting up and driving. Once the temps begin to come up, it free weels and I never notice it. I think this is built into the vehicle, but don't know why. It stops being noisy after the first mile, unless it is a very cold day.

An easy test for the fan clutch is: When the engine is off, it should have some resistance to turning by hand, not a lot. With the engine running and the fan turning, sticking a broom, carefully on the blades, the fan shoud stop. Use the working end of the broom, not the handle.

Last edited by trochoid; Jun 6, 2006 at 01:33 PM.
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Old Jun 6, 2006 | 06:17 PM
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Being the adventurous type that I am, I use my finger for Trochoid's test, but you do need to know what you're doing. Also, I practiced with some cardboard the first few times. And, if the fan clutch is seized, you don't want to be doing this. Disclaimer: Don't try this at home.

Ray
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Old Jun 6, 2006 | 10:02 PM
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Off topic: After all these years of being a member here (more than 5 years total), I finally hit 700 posts!


Originally Posted by ray green
Being the adventurous type that I am, I use my finger for Trochoid's test, but you do need to know what you're doing. Also, I practiced with some cardboard the first few times. And, if the fan clutch is seized, you don't want to be doing this. Disclaimer: Don't try this at home.

Ray
I did this once and I nearly lost my finger! I would definitely take trochoid's advice on this one.
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Old Jun 6, 2006 | 10:41 PM
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I did try it with a gloved hand one time. Fortunately, the clutch wasn't siezed. I realised later how painful it would have been if it was.

Roundabout, I commend your vituosity, I'm just a ****.
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Old Jun 6, 2006 | 11:07 PM
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Post ***** is more like it lol
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Old Jun 6, 2006 | 11:14 PM
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That's why I said ****, I always thought they were the worse of the two. lol. Oh boy, I just upped my count. rofl. My goal is to break 10k by the end of the year.
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Old Jun 6, 2006 | 11:40 PM
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Post ***** just flows better IMO lol

I dont have goals I live day to day, but I hope to be up there one day. I want my posts to so that I have knowledge not just knowledge of how to post.
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