 SIX fan problems, metal on metal |
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| Dr Evil |
 Dec 5 2004, 02:19 AM
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#21
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Send me your transmission!  Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region 
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Short Hijack reply:
Don, I live on 35th, but the cars are in my back yard and all you would see is the shape through a blue tarp, and one orange one partially exposed. My house has a tarped motorcycle on the side of the porch on the sidewalk. I just wanted to let you know that I wasn't ignoring you, just busy with school. Hijack concluded. KT, I'll bet if you find a surface that is tough and concentric you can re-true your housing if it was warped. The only hard part would likely be finding such a surface, but I bet you could. |
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| DJsRepS |
Dec 5 2004, 04:15 AM
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#22
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Member Group: Members Posts: 431 Joined: 4-November 04 From: Sarasota Florida Member No.: 3,060 |
Is that your bench testing exaust? That would look really weird sticking up out of a 914!! I agree with removing the belt and checking your clearances. Not running it 30sec to grind it's way fixed?? As someone else said that could throw out the blade's balance. Wish that motor was going in my car a 72/914/1.7L. Good luck with it.
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| John |
Dec 5 2004, 11:06 AM
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#23
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
QUOTE As someone else said that could throw out the blade's balance. That's what I thought the first time I experienced fan-housing interference. I was observing after a fan swap and there was HORRABLE noise eminating from the fan contacting the housing. The mechanic said that this sometimes happens when a new fan is slightly larger than the old fan. The car was run and the engine was revved a few times and the fan clearanced itself in a very short time. I asked about the balance issue, but was told that the fan blades were harder than the housing so the housing was worn away at the point of contact. They assured me that this is sometimes the case when changing fans (and I trust them). I am only assuming that there is some manufacturing tolerances in the alternator mount and when bolting it up to the fan housing, if it is slightly off, it may rub as a new fan could. The housing is a fairly soft material and will wear quickly. If the noise does not dissipate with running for say 30 sec, there is something else interfering. Without seeing the car or seeing where the interference is, it is hard to determine where the problem is. I suggest that if the problem is not found easily, the fan/alternator be removed again to insure everything is installed correctly and to identify exactly where the interference is before going too much further. The interference should be easily identifiable as bright freshly ground areas. |
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| Trekkor |
Dec 5 2004, 11:18 AM
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#24
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
OK, that was wierd...we were all watching Spiderman 2 last night? (IMG:style_emoticons/default/unsure.gif)
Anyway, It sounds like the fan is rubbing the alt. Not the blades on the housing. I say this because I can't find any rub marks in the housing surface. Pics later... KT |
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| SirAndy |
Dec 5 2004, 01:24 PM
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#25
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Resident German Group: Admin Posts: 41,670 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(trekkor @ Dec 4 2004, 09:56 PM) the sound is awful and it won't go away. (IMG:style_emoticons/default/headbang.gif) then DON'T run it ... (IMG:style_emoticons/default/confused24.gif) Andy |
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| Trekkor |
Dec 5 2004, 01:30 PM
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#26
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
I'm back. All is not lost.
Broke it down again. The inside of the fan body is just tickling the face of the alt'n'r. (IMG:style_emoticons/default/wink.gif) I think a 1/16" thick washer cures all! pics for your pleasure. (IMG:style_emoticons/default/wink.gif) KT Attached image(s) 
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| John |
Dec 5 2004, 01:31 PM
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#27
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
QUOTE Anyway, It sounds like the fan is rubbing the alt. Not the blades on the housing. I say this because I can't find any rub marks in the housing surface. If that is the case, then I would agree with SIXNOTFOUR: QUOTE Is the fan rubbing in the housing ? Or is it rubbing on the face off the altenator, Is the spacer on the shaft behind the fan ? You will need to remove the fan from the alternator and install the spacer so that the fan won't contact the front of the alternator. |
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| Trekkor |
Dec 5 2004, 01:33 PM
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#28
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
Here is the alt'n'r face.
Just a close shave (IMG:style_emoticons/default/wink.gif) The fan blades are fine and the housing is true. When I bumped the fan a scoatch off the alt'n'r it spin silent once again. (IMG:style_emoticons/default/clap56.gif) KT Attached image(s) 
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| Trekkor |
Dec 5 2004, 01:37 PM
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#29
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
You guys are the best... (IMG:style_emoticons/default/smilie_pokal.gif)
Thanks for the help! Here'e the locating pin Don mentioned on the alt'n'r stand. KT Attached image(s) 
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