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> Fan not turning
abes914
post Mar 21 2020, 09:07 PM
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So I thought I had a problem with my alternator. Red light is on and alt not charging. Found out that my fan is not turning. Belt is on and engine runs fine. Is it time to drop the engine? Is it time to get another engine?

Thanks in advance.
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jsaum
post Mar 21 2020, 10:29 PM
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It’s connected to the crankshaft on a hub with a keyway and a bolt. There’s three bolts holding it onto the hub. I would start checking there first.
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porschetub
post Mar 21 2020, 11:13 PM
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Check the belt tension /condition first before jumping ahead,your fan will always drive but your altenator needs the above to work right,make sure you buy the currect belt,sorry but have forgotten ,its more about the width which works right with the 914 altenator drive pulley.
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Mark Henry
post Mar 22 2020, 09:11 AM
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QUOTE(jsaum @ Mar 22 2020, 12:29 AM) *

It’s connected to the crankshaft on a hub with a keyway and a bolt. There’s three bolts holding it onto the hub. I would start checking there first.


(IMG:style_emoticons/default/agree.gif) If the fan isn't spinning you have a serious hub issue.
It could be checked in car, but it's likely going to be coming out. The fan could lost it's bolts and sheared the pin, or a DAPO could have left the hub key out.
Or the crank nose broke off, never heard of it happening in a car, but it has happened to T4 aircraft guys.
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Mark Henry
post Mar 22 2020, 09:22 AM
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QUOTE(Mark Henry @ Mar 22 2020, 11:11 AM) *

or a DAPO could have left the hub key out.



The key could have been improperly installed and pushed/slipped into the engine when the fan hub was installed.
It would've had to been a big jolt to shear the hub key.
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IronHillRestorations
post Mar 22 2020, 10:16 AM
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I can't imagine the engine running, and the impeller not turning without making a serious noise
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abes914
post Mar 22 2020, 11:28 AM
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Thank you everyone for the helpful advice. The belt is the right size and properly installed. The issue started after I got back from our family vacation a few months ago. I asked a friend to stop by our house on weekends and water the plants and warm up the cars so battery won’t go bad. He don’t recall any loud noise. I’ll get the engine out one of this weekends and (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/smash.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif)
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jsaum
post Mar 22 2020, 03:00 PM
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Can use a cell phone and take a picture of the center of the fan? Here’s a few shots of the crank with the hub and keyway. You should be able to reach down inside the fan to feel if the three bolts are still in place. There’s also a shear pin on the hub.


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Mark Henry
post Mar 22 2020, 03:00 PM
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QUOTE(IronHillRestorations @ Mar 22 2020, 12:16 PM) *

I can't imagine the engine running, and the impeller not turning without making a serious noise

(IMG:style_emoticons/default/agree.gif)


QUOTE(abes914 @ Mar 22 2020, 01:28 PM) *

Thank you everyone for the helpful advice. The belt is the right size and properly installed. The issue started after I got back from our family vacation a few months ago. I asked a friend to stop by our house on weekends and water the plants and warm up the cars so battery won’t go bad. He don’t recall any loud noise. I’ll get the engine out one of this weekends and (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/smash.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif)


Buy a couple of battery tender/chargers. (IMG:style_emoticons/default/shades.gif)
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jsaum
post Mar 22 2020, 03:02 PM
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Crank, keyway and fan.


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GregAmy
post Mar 22 2020, 03:15 PM
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Whoa, subscribing for this one...
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abes914
post Mar 22 2020, 06:14 PM
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Tried to remove the bolts but it wasn’t cooperating. I have to drop the engine. The fan is pretty easy to rotate with hand. The fan from my spare engine is not as easy to rotate.
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jsaum
post Mar 22 2020, 06:40 PM
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Ok so the three bolts are in place you definitely need to drop the engine to see what’s going on. The center cone pops off and the bolt that holds the hub on is behind it.
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Superhawk996
post Mar 22 2020, 06:50 PM
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Be forewarned, that hub held by the center bolt sometimes takes a hub puller to get it off the taper.

Might want to start by just removing the 3 bolts that hold the fan to the hub and then see what you can see.

None of this will be easy or fun to do with the engine in the car. Per your previous comment, best to drop the engine.
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euro911
post Mar 22 2020, 06:58 PM
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Definitely sounds like something with the hub/crank key is the cause, Abe.

With the right tools, you can remove the fan and inspect everything. I'd recommend getting an inspection camera, either a stand alone from Harbor Fright, or one that works with a 'schmart fone' (IMG:style_emoticons/default/idea.gif)

(IMG:style_emoticons/default/popcorn[1].gif)
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ndfrigi
post Mar 22 2020, 07:36 PM
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For those who experienced this, are we saying probably the hub between fan and crank got loose? If yes, is the fan should fall or dismantle with the crank easily?

Hope the crank is not damage and may need engine rebuilt. Borrowed picture from one of the member’s thread.

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GregAmy
post Mar 22 2020, 10:29 PM
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Yuck
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abes914
post Apr 20 2020, 04:17 PM
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Got the engine out yesterday. I think the woodruff key got flattened out.



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GregAmy
post Apr 20 2020, 04:26 PM
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That's....unusual.

But if the crank is good, an easy fix.
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abes914
post Apr 20 2020, 05:01 PM
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QUOTE(GregAmy @ Apr 20 2020, 03:26 PM) *

That's....unusual.

But if the crank is good, an easy fix.


That’s what I am hoping

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