 911 motor topic, Fan housing/shroud |
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 Jan 3 2017, 03:06 PM
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#21
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can't remember  Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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OK, my tag line says the 911 is out of action and that must change. I have torn apart and rebuit the whole engine but the fan shroud is cracked, seeing as how it is magnesium. I bought a nice used one and it has the same casting number as the old one. But it is different.
In both the support vanes go to a mounting flange for the alternator. The hole the alternator goes into is the same diameter. The difference is the hole that the alternator fits into is deeper in my cracked original and shallower in the new one. PET says there was a change at the 80 year and I have an '80 SC. With the shallower hole the alternator goes in less and the studs for fastening just barely fit through. No room for a nut. Also, I think the fan would be rather out in the shroud. What I am trying to find out is how to get an alternator to fit the thick flange newly purchased shroud. One question is which is newer and which is older. Here is a photo of what Vertex sells (but doesn't make)  You can get spacer rings for alternators that normally go with a shroud with a hole that is shallower. Help?! |
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Posts in this topic
worn 911 motor topic Jan 3 2017, 03:06 PM
Mark Henry Sucks, you have the wrong fan housing.
Easiest re... Jan 3 2017, 03:23 PM Mark Henry IIRC shallow is the older less amp alt.
Could be ... Jan 3 2017, 03:26 PM mb911 I weld these rings all the time I have 10 of them ... Jan 3 2017, 03:33 PM
worn
I weld these rings all the time I have 10 of them... Jan 4 2017, 10:41 AM worn I got an excellent answer at the Pelican site with... Jan 4 2017, 11:31 AM Mark Henry
I tend to believe Mark, but he didn't sound c... Jan 4 2017, 12:40 PM worn
I tend to believe Mark, but he didn't sound ... Jan 4 2017, 01:12 PM Mark Henry
Yeah, I have the moon cutout on the original alo... Jan 4 2017, 02:28 PM rgalla9146
OK, my tag line says the 911 is out of action and... Jan 4 2017, 09:33 AM Luke M
OK, my tag line says the 911 is out of action an... Jan 6 2017, 10:01 AM worn They crack at the vanes - either at the internal o... Jan 4 2017, 10:30 AM mb911 I am actually knee deep into looking at recasting ... Jan 4 2017, 02:44 PM worn
I am actually knee deep into looking at recasting... Jan 4 2017, 04:26 PM sixnotfour The first ones from vertex where ,sketchy, the las... Jan 4 2017, 04:03 PM worn
FYI the early mag ones can be machined deeper ... Jan 4 2017, 04:27 PM mb911
I am working with a local foundry to try and re... Jan 4 2017, 05:04 PM mepstein
I am working with a local foundry to try and r... Jan 4 2017, 06:21 PM mb911 The major issue is that some will rot from the ins... Jan 4 2017, 05:05 PM sixnotfour after welding, they are going to need machining...... Jan 6 2017, 01:08 PM sixnotfour To answer your question about thick housing , what... Jan 6 2017, 01:20 PM sixnotfour 418 dollars,, where else EBay
http://www.ebay.co... Jan 7 2017, 05:54 PM sixnotfour double post Jan 7 2017, 05:55 PM  |
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