lesson learned then forgotten

[Mountain]

Still waiting for the pics of this rad

I must say I'm tempted to massacre my crud filled rad on Saturday when the new one's in

[widdowson2008]

Still waiting for the pics of this rad

I must say I'm tempted to massacre my crud filled rad on Saturday when the new one's in

Just seen results of Adys probing - you aint gonna believe what you see - made me sit back and have a think.
So it would be interesting to see yours for the sake of comparison. However, forget the caustic - just open it up very gently and lets see what is in there. When you do, get some pics.

[missfixit70]

Here's the Link to Ady's post caustic devastation autopsy. The autobox oil cooler is not what I thought, looks like that could easily become resticted, I may even allow Alacrity to say "I told you so" .
If Northern Bongolow offers you a "slightly used" rad, I'd say no

[widdowson2008]

May be a little fried Kirsty but its bloody clean don't you think?

[widdowson2008]

Ok - yet another can o' worms - wads of questions.

Oil cooler tube is basically a tube within a tube, sealed at both ends with a pipe in and a pipe out for the ATF fluid. Inside this sealed pipe is a gauze element. Coolant flows all around this sealed tube construction providing, in effect, double the cooling ability for the ATF fluid.

Q1 - Are the pics of a genuine Mazda radiator? If so, does anyone have a pattern rad to examine so that we can determine the possible differences?
Q2 - what is the gauze element for? Can't be a filter element - no way of cleaning it.

[missfixit70]

Pretty sure it's a genuine Mazda one, guaze element to dissipate heat better?

[widdowson2008]

Pretty sure it's a genuine Mazda one, guaze element to dissipate heat better?

How would that work then - the gauze bit? Not disagreeing, just curious

[missfixit70]

More surface area of metal, metal conducts heat?

[Allans]

The autobox oil cooler is not what I thought, looks like that could easily become resticted

The design is the very similar on Pajero and Delica. They do sometimes block. For one example, silt build up.

If so, does anyone have a pattern rad to examine so that we can determine the possible differences?

I don't use pattern rads but have seen them.
The ones I've seen have had a smaller oil cooler (heat exchanger). It looked flimsy.
But other pattern rads could vary in construction from those I've seen.

missfixit70 wrote:
Pretty sure it's a genuine Mazda one, guaze element to dissipate heat better?

How would that work then - the gauze bit? Not disagreeing, just curious

You asked about the construction of the oil cooler. Probably easier to gather info if you think of it as a heat exchanger. There's a fair bit of info on the net. It's not all specific to the rad. But it makes it clear. Try this link for starters. http://en.wikipedia.org/wiki/Heat_exchanger

[widdowson2008]

More surface area of metal, metal conducts heat?

But the gauze (presuming that is the metal you're refering to) is sitting in the flow of the ATF fluid isn't it? If so, where can it conduct heat to other than the ATF fluid? Be gentle - treat me as thick.

Just seen Allans post - will take a look at the link

[missfixit70]

But it's also in contact with the sides & it breaks the flow up which will result in better heat transfer

[widdowson2008]

But it's also in contact with the sides & it breaks the flow up which will result in better heat transfer

OK OK OK - I'll accept what you are saying as factual for the following reasons:
1 - My brain hurts
2 - I never argue with females - can't win
3 - What you say sounds reasonably logical anyway
4 - You vary rarely (if ever) make statements you can't back up
........and therefore, I reckon you are right.

Incidentally, have you had a look at the link Allan posted? Explains things about heat exchangers that even I can understand. Maths side gets quite interesting too. Cheers Allan.

Also, from what we have learned about the differences between Mazda and Pattern thermostats, I would think there could (probably will) be differences in the Mazda/Pattern radiators ie:cheaper construction, eliminating the finer, but not ABSOLUTELY essential features.

[missfixit70]

I had a quick scan of Allans link - reminded me too much of my marine engineering days, 50% of the gear in the engine rooms seems to be about heat transfer
What worries me about pattern parts is that sometimes essential features of the design may be overlooked if the full function isn't understood, eg thermostats - the emphasis seems to be placed on the opening temp, whereas the more important factor IMO is the temp it opens fully, is this taken into account in the pattern part design?

[Northern Bongolow]

it would be interesting if mountain could butcher his old rad(get his own back a bit,and remove some of that anger) before cleaning it out,on my rad i noticed that the heavy solids were removed with flush,but this left a (lacquer)on the hot spots possible burnt on,have seen similar effect on some stats after removal.in areas of high flow this is removed,but as the flow slows with build up the lacquer gets thicker,wonder if this lacquer stops the heat getting away to the rad body.

[Mountain]

IMO is the temp it opens fully, is this taken into account in the pattern part design?

Indeed! When I put the pattern and genuine in a pan, the genuine opened slighty sooner. However it opened fully much faster. It also opened 'further' than the pattern stat.

it would be interesting if mountain could butcher his old rad

I think I will do

Only 160miles to go before new rad

My dad's workshop and car lift are needed. I want to get it up in the air and have a good check for leaks after changing it.
Also have a 6yr olds Birthday party & BBQ to fit in