Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

Go to Thread: PreviousNext
Go to: Forum ListMessage ListNew TopicLog In
Goto Page: Previous12
Current Page: 2 of 2


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: August 30, 2017 04:22PM

Slight problem. The crossflow radiators have the fill neck on the suction side. (Of course dummy.) This doesn't work at all. Too bad though, it seemed like a clean solution. Maybe with a much cooler switch point.

Might work with a downflow but only if the fluid can be kept in contact with the bulb.

Well, thanks for the assist guys. Fun, if not successful.

Jim


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(968 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Rad cap mounted temp switch
Posted by: ex-tyke
Date: August 30, 2017 05:12PM

Seems to me that late model MGB's had the fan sensor stuck in a hole in the upper tank (forward face) and retained with a wire clip. If you're going the soldered bung route, why not solder it into the pressure side end tank, similar to original. Your fan switch needn't be so long and more available, then.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: August 30, 2017 06:52PM

Yes, it is flat on the end and with some heat sink paste could simply be clamped to the tank. I will give it some thought. Maybe a fairly simple "C" shaped clip with a threaded hole and screw in the sensor as the clamp. Could be a good idea. Make it out of about 10 ga. aluminum maybe.

Jim


MGBV8
Carl Floyd
Kingsport, TN
(3181 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Rad cap mounted temp switch
Posted by: MGBV8
Date: August 30, 2017 07:58PM

I have one like Ivor posted tied to my OEM electric fans with the probe stuck way up into the upper hose. This is as a backup to my engine fan.


302GT
Larry Shimp

(171 posts)

Registered:
11/17/2007 01:13PM

Main British Car:
1968 MGB GT Ford 302 crate engine

Re: Rad cap mounted temp switch
Posted by: 302GT
Date: August 31, 2017 07:57AM

I have a temperature switch that is on a probe that fits into the radiator fins (air space) not water space.core. It is about 1/3 down from the top and works just as intended. It is easy to experiment by inserting it in different parts of the radiator...


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: August 31, 2017 12:23PM

Here's my next attempt:

IMG_0017.JPG


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: August 31, 2017 12:37PM

Had to trim the bracket a little to fit it through the radiator mounting frame.

IMG_0018.JPG



88v8
Ivor Duarte
Gloucestershire UK
(487 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
TR6 74 2.5 injection six

Re: Rad cap mounted temp switch
Posted by: 88v8
Date: September 01, 2017 03:44AM

You might want to put some heat paste on the sensor where it contacts the rad, make sure it picks up the temp.
[www.amazon.com]

Ivor


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: September 01, 2017 10:49AM

Yeah, I did that but thanks. I need to go back and short the leads to make sure the fans activate. They should but I'm still not getting the right results. More later.

Jim


DiDueColpi
Fred Key
West coast - Canada
(1209 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Rad cap mounted temp switch
Posted by: DiDueColpi
Date: September 01, 2017 03:25PM

Have you checked it out with an infrared heat gun Jim?
Probably the easiest way to home in on the sweet spot.
The heat loss around the sensor might be too much as well. Might need some sort of insulation to function correctly.

Cheers
Fred


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: September 02, 2017 11:40PM

Turns out the switch was the wrong spec. I'll need to find one that turns on at about 185 and 195F. I think it's a 22 x 1.5mm thread.

Jim


DiDueColpi
Fred Key
West coast - Canada
(1209 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Rad cap mounted temp switch
Posted by: DiDueColpi
Date: September 05, 2017 03:04AM

You need the early VW Audi rad fan switch Jim.
Dual range, 95/84 - 102/91 degree C, on /off temps.
22 by 1.5mm thread.
Will run a 450 watt fan without a relay but I always put one in anyway.
Part # 321 459 481A

Cheers
Fred


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rad cap mounted temp switch
Posted by: BlownMGB-V8
Date: September 06, 2017 10:41AM

Thanks Fred (just sent you a PM btw)
If I could get one just a little cooler than that I think i'd like it better.

Jim
Goto Page: Previous12
Current Page: 2 of 2


Sorry, only registered users may post in this forum.