[Home | Mail Archive | Join the mail archive | Photo Gallery ]

Mazda Rotary Pickup Forum
you are logged in as
profile | register | faq | search (active threads) | memberlist
Sponsored by:
Index > Engine/Drivetrain > Thread: coolant neck
Thread: coolant neck
gdw3138


1st Gear
Posts: 39
posted January 16, 2006 06:31 PM

coolant neck

I am considering gong to an 16" electric fan. I understand that there is a 13B coolant neck from an 80's RX7 that has a threaded fitting that a thermostat (a Honda unit) could be screwed into. I would then connect the thermostat to a fan controller and relays. Does anyone know what year coolant neck might work? Any other thoughts? I know this won't help my weber icing problems up here in Seattle, but I don't need the extra cooling from the fan during warmup.
Thanks.

       
View IP (Administrators only)
RotaryRob


Revvin Up
Posts: 53
posted January 17, 2006 09:49 AM

Coolant Neck

I think it is curious that you want to use an electric fan. You might want to consider that it isn't actually doing any "cooling" during warm-up because the thermostat is blocking the warming coolant from entering the radiator. If you have an icing problem with your carbs, the air blowing from the fan may actually help it as that air is slighly elevated in temp from the ambient due to the energy it absorbs from the fan compressing it to move it.
Anyway, there are several models of Rx's that had coolant necks that were either fitted with a sensor or cast with a boss for fitting a sensor that wasn't used. Earlier (pre'86) models were shorter than the later ones. I think I have some of the earlier, shorter ones I'd part with; both fitted for the Mazda sensor and ones with the boss that is not drilled or tapped. You could drill and tap one of these to fit the sensor you come up with.
Sorry I can't recall just wich engines came with the fitted or bossed necks; but know that the short ones were from pre-'83 Rx's.
Good luck with your swap. Let me know if you'd like to arrange a deal on one of the necks I have.

Happy Rotoring,

Rob ...... (Oklahoma)
____________
'77 RPU
'75 RPU (V-6)
'76 Courier
Rotary Sprite (3 - 2 project)
'85 IT 7
EP '85 Rx7 (in progress)
'85 GSLSE (4)
C6 Corvette Roadster

       
View IP (Administrators only)
gdw3138


1st Gear
Posts: 39
posted January 17, 2006 11:45 AM

You are right about the fan moving the air, but what I am seeing is that the fan clutch seems to engage after a few seconds. I would have thought that without the fan moving the air, the heat from the engine while sitting still and warmup would rise and warm the carb sooner. The other issue is that at higher rpm, the fan seems to slip on the pulley. I don't have the air pump and haven't had a chance to put the double pulley on yet. I thought that while I was putting the new pulley on I might change the fan to electric.
Rob - I would be interested in the neck with the threaded hole. Do you know whether there might be interference issues? It does look there wouldn't be any. Let me know how much you want.
Thanks,
Gary

       
View IP (Administrators only)
RotaryRob


Revvin Up
Posts: 53
posted January 18, 2006 09:48 AM

OK Gary,.... I work out-of-town all week and only home on weekends now. I'll check my parts next weekend and see what I can find for you.
____________
'77 RPU
'75 RPU (V-6)
'76 Courier
Rotary Sprite (3 - 2 project)
'85 IT 7
EP '85 Rx7 (in progress)
'85 GSLSE (4)
C6 Corvette Roadster

       
View IP (Administrators only)
RotaryRob


Revvin Up
Posts: 53
posted February 02, 2006 01:31 PM

Gary,
I looked through my parts last weekend and found some necks with the boss already threaded for the Mazda sensor. I don't have a spare that isn't threaded. If you still want one let me know and we'll work something out.

Happy Rotoring.......
____________
'77 RPU
'75 RPU (V-6)
'76 Courier
Rotary Sprite (3 - 2 project)
'85 IT 7
EP '85 Rx7 (in progress)
'85 GSLSE (4)
C6 Corvette Roadster

       
View IP (Administrators only)
gdw3138


1st Gear
Posts: 39
posted February 02, 2006 06:55 PM

coolant neck

Great, let's set this up. My email is gwyatt74@comcast.net. Let me know the cost and shipping to Maple Valley, WA 98038. I'm in no big hurry to USPS ground shipping will be fine.

Thanks for your effort.

Gary

       
View IP (Administrators only)
All times are PST (US)
Post New Topic    Post New Reply
Rate Topic:
Powerd By: BlazeBoard

[Home | Mail Archive | Join the mail archive | Photo Gallery ]
0.011504888534546 seconds processing time