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Old 12-16-2015, 06:17 AM   #1555
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1984 34.5' Airstream 345
Greenville , Ohio
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Here is what I know Bob...
California spec '87 R2500/3/4T Suburban with 454/TH400, rear AC and tow package was fitted with the 7 blade. All others had 5 blades.
7 blades are rare... you can't find them new... I have 2!
Scoured the Junk Yards for them.
Living in the southwest, I don't think I can go wrong... max cooling if the Viscous Coupling can keep up.

Anyone wants a Flexfan and fittings off my 345, it's yours for the shipping!

Nothing from the Alcoa seller BTW Bob... letting that one go.
How well did the Flexfan keep the Engine temperatures in check. Since it is a direct drive I would believe it would reduce Engine temperatures better than the Viscous Coupling Fan. If that is the case I may be interested in the Flexfan.
Gunter
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Old 12-16-2015, 06:51 AM   #1556
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I fiqured the seven blade would be better than the five, last year's trips were trips where the 325 constantly ran hot, no chance of towing my car with the dolly. Radiator will go to the shop to either be re-cored or upgraded to 4 row if possible.
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Old 12-16-2015, 07:15 AM   #1557
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I had no issues with overheating on my maiden voyage, but it was in April, so cooler. The flex is a 6 blade, and whilst it worked well, it just seemed too noisy to me.
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Old 12-16-2015, 12:10 PM   #1558
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I hope I'm not too far off point here.
Before you make an effort to replace the fan it might be a good idea to listen to the OEM metal fan. It's a noisy bugger too.
Summer before last during a trip to Ca. My fan was almost always engaged. It drove me nuts. On the occasions that it did quiet down the contrast was wonderful, big sigh of relief.
That was part of the reason that I replaced most of the cooling system before this last summers trip.

That noisy trip was with a new fan clutch installed. But the running temps were above the setting in the clutch to engage most of the time.

I replaced the clutch on warranty when I got back from that trip but the new one was about the same. That was when I realized that running at 205 was just too hot for the clutch.

Now with the cooling system working better the fan clutch engages when you want it too, long hard climbs. Super hot weather sitting traffic etc.
It is very effective in bringing down the temp quickly when it does. The temp of engagement seems around 200 degrees sometimes less.

In this case it may pay to look upstream for the real solution to that issue.

Cheers Richard
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Old 12-16-2015, 12:17 PM   #1559
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Peter, I had looked on Rockauto, as they are normally great but nothing listed for my year/model. The link you posted took me to the main page, and a search of diverter valves didnt give me any that matched. I searched my part #17084016 and nothing.
I will post a pic of it when I get a min.

Barad, if by chance you find that pump, and its the same as mine, i sure we can reach an agreement!
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Old 12-16-2015, 02:48 PM   #1560
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Peter, I had looked on Rockauto, as they are normally great but nothing listed for my year/model. The link you posted took me to the main page, and a search of diverter valves didnt give me any that matched. I searched my part #17084016 and nothing.
I will post a pic of it when I get a min.

Barad, if by chance you find that pump, and its the same as mine, i sure we can reach an agreement!
I'll look this evening when I go up to the barn to feed the donkey.
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Old 12-16-2015, 02:57 PM   #1561
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1997 30' Excella
1983 31' Airstream310
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Quote:
Originally Posted by Keyair View Post
Peter, I had looked on Rockauto, as they are normally great but nothing listed for my year/model. The link you posted took me to the main page, and a search of diverter valves didnt give me any that matched. I searched my part #17084016 and nothing.
I will post a pic of it when I get a min.

Barad, if by chance you find that pump, and its the same as mine, i sure we can reach an agreement!
I may have misunderstood you. I thought you were looking for the entire pump
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Old 12-16-2015, 03:05 PM   #1562
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Thanks Brad!

No problem Peter, the pumps are available i think, but the Diverter valve assembly that mounts on them and shuts off air injection under deceleration is not.
I found one that looks similar... but at $300 it is a risk!
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Old 12-16-2015, 05:04 PM   #1563
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Ok Steve, here's what I've got stashed away in the barn loft. The 86 345 had two smog pumps, one on top of the intake manifold and the other on the side below the alternator.

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Also is this the fan you're taking about? I don't remember if this one came from the 345 or if it came from on of the U-pick-it places in or around Pasadena.
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I have one on my Argosy 454 and I think it's the one that was actually on the 345 as I also used the fan clutch from the 345.

Brad
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Old 12-16-2015, 10:14 PM   #1564
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Yes, Brad thats the 7 blader!
Sadly, those smog pumps are not like mine, and by the look of the electrical connector, ECM driven. Ugh... I was hoping!

Here is my Vacuum driven diverter... note, i broke it open, and resealed the vacuum cap, with no luck.



So, today was a wash...
Late start due to client calls, and problems when I did get going.

I shortened the melted starter cable, and soldered a new terminal on, and heatshrinked over the cable.
But with the new heat shield and terminal, I could not get the starter/cables into place... holding a Big Block starter and stiff heavy wires up over your head is a workout for sure!
Gave up.... needed to rethink this!

While I was working on that, I spotted another issue...
I have a HUGE red cable(maybe 00 gauge) running from my battery drawer to the solenoid on the drivers bulkhead..
The one on the right in this pic...


Anyway, nice cable but badly routed...
It comes along the OUTSIDE pass side chassis rail... rolls up and over the rail, and then goes inside, zip tied to the FUEL lines, past the headers(insulation is already heat bubbled). Goes under the engine mount, and fuel pump, and then across the front X member(hanging down below the bumper) and then to the the solenoid.
Not good. AT ALL!
I pulled the darn thing out, and will reroute it... If I can't do a better, safer job, take me outback and shoot me, someone please!

Hoping tomorrow will be more productive.
Oh, and it looks like my PS pump is leaking...

Ok, here is a pic looking up from underneath at my radiator fan/shroud.
Fwd is up...


Remnants of tinwork on pass side tells a story...
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Old 12-16-2015, 11:02 PM   #1565
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Steve,

Choose your words carefully…..

Brad was talking about shooting things earlier today!
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Old 12-16-2015, 11:06 PM   #1566
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Steve,

Re: the big red wire….

Is that part of the system that's connecting your "house" battery bank to the engine battery for emergency starting power?
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Old 12-17-2015, 04:59 AM   #1567
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1997 30' Excella
1983 31' Airstream310
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Quote:
Originally Posted by Keyair View Post
....

Ok, here is a pic looking up from underneath at my radiator fan/shroud.
Fwd is up...


Remnants of tinwork on pass side tells a story...
identical to mine, except someone cut the access hole for the fan in the shroud. Well, that's just too cool, because all I need to do is drill out my fancy alu patch to gain access.
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Old 12-17-2015, 05:13 AM   #1568
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1974 20' Argosy 20
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Yes, Brad thats the 7 blader!
Sadly, those smog pumps are not like mine, and by the look of the electrical connector, ECM driven. Ugh... I was hoping!
Steve, no ECM on the 86. It surprises me that GM would have used so many different versions of smog equipment in the span of 3 years. Are you 100% sure you've collected the right equipment for your system? I wish I had taken pictures of my old 310 before it left the property but I didn't

Sorry these weren't what you were looking for.

Brd
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