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Given the useful state of this other fan housing, the vulture that was circling decided that the fan housing should live on inside a 964/993 (95 is best due to missing AC bracket bolt, see above post), and not become some desk clock or lampshade (that might hurt someone when they end up wearing it during a drunken night of Dogfishhead, Zenit huffing, horse & buggy jokes and 993 lies...).
I went through the same thing a few years back. One of my alternator holes was too far gone to weld. My fan was also suspect, so I wound up with a VERY expensive wall clock in my garage.
Ugh...that one spot looks kind of deep. Is it all flaking off where the deep hole is? Perhaps probe a bit with a screwdriver to see how much is really coming off easily and if its just surface stuff or structural. You could try and get it bead blasted (about $50 here in SD) and take a better look...could look better or worse.
Or click on my link above to the For Sale thread for mine, which is already nice and shiny!
BTW Keith,
If the part is magnesium, the process of powder coating helps create unnecessary porosity and has the distinct possibility to further weaken the already flimsy structure.
Additionally, and in retrospect, due to the lack of structural integrity, the heat from welding may very well tweak the part way out of round, unless the rest of the structure which is not being welded is submerged in something like sand, to keep it cool and less heat stressed and pulled into an out of round condition.
?????? I need to correct this Magnesium is not susceptible to porosity by powder coating nor will it weaken the casting. How can you introduce porosity to an already solidified metallic part? Magnesium is susceptible to corrosion from moisture, salts and the elements when exposed and not properly protected. Magnesium is quite strong and is not a flimsy structure. If cast correctly and heat treated properly you would have a hard time doing damage to a casting like that unless you drive a semi over it. Mechanical properties of magnesium are not much different than aluminum although yield is lower on average ultimate tensile is higher for minimum requirements.
I agree with welding magnesium. Magnesium should be heated to about 600 degrees prior to welding and once done it will have killed the temper. If not done properly it will twist the casting. It should be solution treated and aged after any welding.
Originally Posted by kjr914
Update:
TIL: (Today I Learned. ...more like a few months ago, but now have time to do the post...)
964 (and I assume early 993) fan shrouds are SLIGHTLY different than later ones, BUT bear the same part number. I found a fan shroud off a 964 with the same part number as my '96 (964.106.667.OR), but it was missing the AC bracket bolt that is needed for 96-98 993s with the later AC line routing. See bolt in shroud in following pic and 2nd pic is part numbers from the 2 housings.
In the end, I found a local welding/machine shop that was able to fix mine up for a reasonable cost, so I reused it. Sorry, the 964 shroud is spoken for already.
I think it all came out rather well for rattle-can painting. Shroud was bead blasted clean and clear coated with Duple-Color Engine Enamel Gloss Clear. My inspiration was Steve Weiner's work on RLer callipygian 911's car. (Thanks for the PM's, Steve! ) Fan is Duplicolor Caliper paint (red caliper paint BCP100)....closest thing I could find locally/quickly to the Big Red caliper color.
Redneck quality paint booth...
That is interesting. I am surprised there is no change to the part number.
That is interesting. I am surprised there is no change to the part number.
Seriously strange. Very un-German.
By the way, my original buyer for the 964/early993 fan shroud didn't take it, so its still in my garage looking to migrate to yours: 964/early 993 fan shroud for sale.
Also, its a good price, but not cheap enough to make a lampshade out of it... You know who you are...
I should just hide it away until, like 356 parts, it becomes gold...
That is interesting. I am surprised there is no change to the part number.
I have recently had a lot of "fun" with the fan housings as I needed to replace one. In case others come across the posting in the future, here's what I think is true.
- 964.106.667.OR is a "casting" number, not a part number.
- The same casting is used to make both the 964/993nonvram and 993vram parts. For the earlier part, the AC post is machined off.
- 964/993nonvram part number is: 96410666702
- 993vram part number is: 99310666703
- Last year, Porsche had a SNAFU and all the 993 parts also had the AC line post machined off, essentially making them the 964 part. However, they still got labels with the 993 part number and distributed as such. Here's the photo of my old housing and the new one I got that was labeled with the 993vram part number, but was missing the AC post.
As I had ordered the part from Sunset Porsche, I discussed the situation with the very helpful staff there. They were able to confirm the SNAFU with Porsche, and Porsche corrected the problem with new batch of 993 parts earlier this year. I received the correct housing early in March this year.
I have recently had a lot of "fun" with the fan housings as I needed to replace one. In case others come across the posting in the future, here's what I think is true.
- 964.106.667.OR is a "casting" number, not a part number.
- The same casting is used to make both the 964/993nonvram and 993vram parts. For the earlier part, the AC post is machined off.
- 964/993nonvram part number is: 96410666702
- 993vram part number is: 99310666703
- Last year, Porsche had a SNAFU and all the 993 parts also had the AC line post machined off, essentially making them the 964 part. However, they still got labels with the 993 part number and distributed as such. Here's the photo of my old housing and the new one I got that was labeled with the 993vram part number, but was missing the AC post.
As I had ordered the part from Sunset Porsche, I discussed the situation with the very helpful staff there. They were able to confirm the SNAFU with Porsche, and Porsche corrected the problem with new batch of 993 parts earlier this year. I received the correct housing early in March this year.
I must assume the original 964 parts never had the boss for the A/C. It must have been added as a revision to the part number and now they machine it off the 993 part to make the 964 part. Easier and cheaper than making two sets of tooling.
I have to say that is sloppy work on their supplier side. They could have easily done a better cleaning job removing the boss. I must also ask is the housing supplied in raw magnesium without any coating or does it have some form of sealant on it? If not I am shocked they would supply a part that will easily corrode without any protection from the elements.
It's my understanding that the newer parts are no longer cast in Magnesium. They are now Aluminum.
I know the fas are still magnesium, Although it is hard to tell from the picture the material looks like brushed mag and not aluminum. Only way to tell is weigh them both the mag part should be about 30% lighter assuming they are the same design.
I am not very knowledgeable in metals or their finishes. That said, the new fan housing I received does not have any finish I can notice. My plan is to paint the housing.
I will weigh my two fan housings. The "new" one is new this year, and I assume the old one is original, but I've only owned the car since late 2012.
07-09-2015, 10:32 PM
) Fan is Duplicolor Caliper paint (red caliper paint BCP100)....closest thing I could find locally/quickly to the Big Red caliper color.
Yep, no time at all....as I expected!
