Radiator Compatiblity

Post by **alex_holden** » Fri Jul 03, 2009 12:21 pm

You seem to have a temperature switch fitted where the temperature gauge sender usually goes (in the side of the head below the thermostat). Was that for the electric fan?

The top of the thermostat housing isn't the ideal place for the temperature sender because it's measuring the temperature of the water coming out of the thermostat rather than the temperature inside the engine. This means it will show less than the true temperature until the thermostat has opened.

Post by **Declan_Burns** » Fri Jul 03, 2009 12:43 pm

Yes h20_mako it is a convertible. The temperature sender is clearly visible on my photos above. The little brass piece with the black collar.

Post by **h20_mako** » Fri Jul 03, 2009 12:44 pm

i really wish you guys are beside me to educate me it will be much easier for you to explain to me. i have lots to learn from you all..

you see in Singapore most of the time when in need for repair, we will just send it to a mechanic. so lots of stuff if we do not have hands on, we will not know much on what has been done by them

and there isnt much experience mechanic for morris minor. so i have just taken over this car from my dad, i would want to do things myself if its within my means and knowledge. I love to work on my car

Colin - i will have to check on that. from what i remember there seems to be no indication on the cap.

Alex - I am not really sure whats what. In picture in red it seems to me its a switch also as there is 2 contact point. and in blue i understand as mentioned the temp will be inaccurate as it has exited thermostat which might explain why my temp is 65degreeC. i will try to check where the wiring leads to and get back to you on this.

Post by **alex_holden** » Fri Jul 03, 2009 12:51 pm

Yes, that's right.

Post by **rayofleamington** » Fri Jul 03, 2009 10:21 pm

and this is a picture of the burst radiator top which is welded back. after a year or so its starting to get bulge slightly. Getting worried

the only times I've seen a radiator looking like that is when the water has frozen up (due to lack of antifreeze).
Over here it's amajor issue - I've even seen a Minor cylinder head split open due to freezing up!

Post by **h20_mako** » Mon Jul 06, 2009 2:41 am

ColinP - This is the picture of the radiator cap. it states 4 so i guess that is fine.

Post by **h20_mako** » Mon Jul 06, 2009 3:19 am

Declan - I still have not checked if i have the thermostat fitted. Will do so asap.

Post by **h20_mako** » Mon Jul 06, 2009 3:29 am

Alex - you are correct, the temperature switch (#1 RED CIRCLE) which is connected to Bosch "i think a voltage regulator" (#2 RED CIRCLE) and from there connected to the electric fan in front of the radiator.
you were saying that currently where this temperature switch is, should rightfully be a temp sender right? So if a temp sender is place instead, the water temp gauge should read approx 80degreeC to be ideal? and not at (#3 BLUE CIRCLE) as the temperature will possibly be lower than the actual as it has exited the thermostat.

as for (#3 BLUE CIRCLE) i only see that the wire run through and into the firewall.

Post by **bmcecosse** » Mon Jul 06, 2009 7:57 am

Yes - it will not make a significant difference - but swop them over if you like !

Post by **Kevin** » Mon Jul 06, 2009 10:28 am

bmcecosse wrote:" twin core" - Hmm - that's odd, because in Mini world -the twin core is considered useless and 'four core' is the way to go for highly modified engines !
However - water temp at 65 degrees is NOT overheating - in fact, it's running cold !

But the radiator in the mini is in the wrong place to start with

Post by **alex_holden** » Mon Jul 06, 2009 11:22 am

h20_mako wrote:which is connected to Bosch "i think a voltage regulator" (#2 RED CIRCLE)

I think that's probably a relay, used to switch the heavy current of the electric fan.

Post by **bmcecosse** » Mon Jul 06, 2009 9:40 pm

Oh I dunno Kevin - it works very well and is about half the size of a Minor radiator - for the same engine !

Post by **h20_mako** » Tue Jul 28, 2009 7:34 am

Hi Alex and Declan,

Are both of your engine a 1098? As i've heard that originally there should be no thermostat and i have checked mine and there is no thermostat installed.

I have bought a 74degree thermostat and in my country its pretty hot so would it be better if there is no thermostat for my case?

As for UK its much cooler so i guess the thermostat is there so that your engine can reach its optimum working temp for the engine to be more efficient.

Anyone please advice?

Thanks

Post by **bmcecosse** » Tue Jul 28, 2009 9:35 am

You MUST have a thermostat in there - otherwise the water just short-circuits around the front of the block. 74 sounds ideal for you. There is a 'blanking sleeve' that is often fitted for racing - which ensures the water flows all round the block. If you really don't want a stat - then you should fit one.

Post by **h20_mako** » Tue Jul 28, 2009 10:45 am

how does this blanking sleeve look like? and where is it fitted to?

Post by **bmcecosse** » Tue Jul 28, 2009 11:54 am

Here tis - http://www.minispares.com/Product.aspx? ... NG%20SLEEV...
It simply fits in place of the thermostat. But your 74 degree stat will be fine !

Post by **h20_mako** » Tue Jul 28, 2009 5:11 pm

while trying to test fit the thermostat, i notice that the stat does not sit enough around the edges. Will there be some amount of water sipping through the edges?

Post by **bmcecosse** » Tue Jul 28, 2009 6:12 pm

Don't worry about it - it will be fine ! It's not meant to be a tight seal.

Post by **h20_mako** » Wed Jul 29, 2009 12:19 pm

will install it...thanks

Morris Minor Owners Club

Radiator Compatiblity

Thermostat