AC Instalation in a GTV 2000 Part II - Page 2 - Alfa Romeo Bulletin Board & Forums

Reply
 
LinkBack Thread Tools Display Modes
post #16 of 25 (permalink) Old 02-21-2016, 08:42 PM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
Reviving an old thread - thanks for documenting your electric fan mounting method.
Curious as to why you did not choose to have a bung installed in the bottom of the radiator and have the temperature sensor run from that- was it because the probe style was part of a kit you bought?
Reason I ask is that I am considering doing the swap to electric for my 69 1750 Spider.
Thanks!
rsj

1969 1750 Spider (Euro)
rsj is offline  
Sponsored Links
Advertisement
 
post #17 of 25 (permalink) Old 02-21-2016, 08:59 PM Thread Starter
Senior Member
Gold Subscriber
 
WA-Alfa's Avatar
 
Join Date: Jun 2009
Location: Australia
Posts: 733
Garage
Well guessed. It was part of the kit I bought. Eventually this thermostatic switch failed and I replaced it with this.....

Electric Fan Thermostatic Controller ? In Line Hose Version

which worked well for 6 months but that too now just comes on all the time rather than switching on at the appropriate temperature. I think some of these switches may be unreliable or something.

I also eventually upgraded the radiator fan shown in this thread to something more powerful than the one I installed.
WA-Alfa is offline  
post #18 of 25 (permalink) Old 05-01-2016, 12:43 PM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
Just thought I'd add some details about the way I went about this with my 1969 Spider and thanks again to the original poster for ideas!
I am not quite finished the install yet, but close enough perhaps to help others who may want to take this route.
I went with a Hayden Rapid-Cool 12" fan (part #3680-$60 at O'Reilly's Autoparts in Vegas) and mounted it similar to the OP as a puller fan (instructions with fan explain how to flip fan blade and reverse the polarity since it comes as a pusher setup by default).
Someone had asked about the specific brackets used to mount the fan - a little looking around got me an 8' piece of L bracket ($5) designed for use with suspended ceiling tiles -lightweight but strong, not perforated so had to drill holes at correct spots. With cutting and drilling, it mounted very securely to the studs for the original fan shroud, right up against the rad. On the passenger side of the rad, I just used some bendable thin bar stock oriented to avoid blocking airflow.
I wanted a fan thermoswitch in the bottom tank of the rad, so ordered the Alfetta/GTV switch from Classic Alfa (others carry it) and now was left with how to get it into the rad. I'm sure with enough looking I could have found a perfect fitting online, but I didn't want to wait. Locally no luck on a perfect fitting, but I made something work:
- a 3/4 NPTM x 3/8 NPTF brass fitting ($4) which I had drilled out on the 3/8 side to 13/16, then had tapped for the Alfa switch (M22x1.5, managed to find a machine shop with one), then hacksawed the 3/4 threads off, leaving a short, 1" diameter collar that could locate the bung in the 1" hole in the rad, then brazed in on the hex sides. This should allow me to get a thin wrench on the bung to tighten the switch in, without putting too much pressure on the brazed joint.
Pictures attached. I will update as I finish this in the next week and get the car on the road.
Attached Images
     

1969 1750 Spider (Euro)
rsj is offline  
 
post #19 of 25 (permalink) Old 05-01-2016, 12:45 PM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
Two more images.
Attached Images
  

1969 1750 Spider (Euro)
rsj is offline  
post #20 of 25 (permalink) Old 05-01-2016, 09:41 PM Thread Starter
Senior Member
Gold Subscriber
 
WA-Alfa's Avatar
 
Join Date: Jun 2009
Location: Australia
Posts: 733
Garage
Nice work - well done.

I'm curious, what are the markings on the Alfetta switch? Is there anything that hints at an ON and OFF temperature, part number, and manufacturer?
WA-Alfa is offline  
post #21 of 25 (permalink) Old 05-02-2016, 08:32 PM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
Getting my rad and switch back from the rad shop tomorrow - will check. I do know there were some numbers there stamped on the flats of the hex.
Minor correction, the switch came from Classic Alfa in Britain, and is actually listed as their one for the Series 4 Spider, not the Alfetta/GTV one (although I suspect they are probably identical).

1969 1750 Spider (Euro)
rsj is offline  
post #22 of 25 (permalink) Old 05-02-2016, 10:07 PM Thread Starter
Senior Member
Gold Subscriber
 
WA-Alfa's Avatar
 
Join Date: Jun 2009
Location: Australia
Posts: 733
Garage
Thanks - it would be good to know the details as this would enable some of us to locate the item locally - or change to a switch with a different ON and OFF temp.

You may also find this thread useful

Reliability of electric fan switch

I recommend using the switch with a relay to prevent it failing, and beware of over tightening the switch when installing to prevent internal damage to the switch.
WA-Alfa is offline  
post #23 of 25 (permalink) Old 05-06-2016, 07:44 AM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
The thermoswitch is stamped 85 -75 (Celsius), which converts to switching the fan on at 185F, shutting it off at 167F.
Unfortunately, no other markings.

1969 1750 Spider (Euro)
rsj is offline  
post #24 of 25 (permalink) Old 05-06-2016, 09:25 AM Thread Starter
Senior Member
Gold Subscriber
 
WA-Alfa's Avatar
 
Join Date: Jun 2009
Location: Australia
Posts: 733
Garage
Thanks rsj - that's useful to know. I wonder if an OFF of 167F might be a little low and while others may well prove me wrong, I understand that the GTV stabilizes with an open thermostat at 175F. Could this mean that the switch never turns off?

That said, there might not be much in it. My switch turns off at 174.2F which is pretty close to 167F.

Last edited by WA-Alfa; 05-06-2016 at 09:29 AM.
WA-Alfa is offline  
post #25 of 25 (permalink) Old 05-06-2016, 09:14 PM
rsj
Registered User
 
Join Date: Apr 2004
Location: Kelowna, B.C., Canada
Posts: 103
When I get it on the road shortly, I will keep a close eye on it to confirm operation details. It should be coming on often as we here in interior B.C. head into 25+C weather on our way to 35 C as summer kicks in.

1969 1750 Spider (Euro)
rsj is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome