Vilhuer

Anyone know what part number this is? IIRR at least some aftermarket alu radiators do not have this build in. Might be good idea to add it if factory piece is cheap and fits. Text is from '83 MY changes document.

Vilhuer

Found it. 928 106 142 00 water tube for radiator. PET do not show it in picture but it's listed at the end of the section. 54.25 euros in France.

dr bob

Interesting find! Looks like something that could be fabricated fairly easily if dimensions are available. Or custom fitted next time a top radiator hose is disconnected. Would need to be aluminum, have a soft anti-wear pad fitted at te end where it contacts the center section. I'd also be tempted to drill a small vent hole in the top inner section to allow vapor to pas across the top to the vent hose on the left side of he radiator (left is left, looking from the rear of the car...)

Bill Ball

Is it clear which direction the slot in that diverter faces? The orientation of the cutaway section of the radiator is not clear to me.

Vilhuer

I believe slot is from 3 to 6 o'clock meaning it prevents water direct access from upper hose to top part of the core forcing it to spread more evenly between upper and lower part of the core. Little trick which I believe is missing from aftermarket radiators, at least some of them. Factory part is expensive for what it is but at least it's available and probably will fit also into aftermarket radiators. There is likely some spring action in it so it will not move once it's pushed in.

Hilton

I've got it in my '89 (stock radiator).

Its been a few years since I had the radiator out, but from memory, its a bit of a head scratcher which way to orient the tube. I think I settled on having the slot face directly downwards, to direct flow to the cooler lower part of the radiator. I'll have a dig for pictures - my memory says its alloy too. Nice find on the part number!

edit: Found some pics of when I took the plastic end tank off. Annoyingly I didn't get a clear shot of all of it - but I can see the slot on the hose end of the insert.

It faces at a 45 degree downward angle towards the outside of the radiator. i.e. between 3 and 6 o'clock as you look at the side the hose attaches to.

Here's a pic from when I was compressing the end tank to unbend tabs.. at this stage the radiator was completely original (factory stickers etc. too). Annoyingly, I don't think I oriented it this way when I moved it to the new end-tank - hopefully my memory is wrong, but I'll find out when I start the now-due TBWP on my 89.

Bill Ball

3 to 6 o'clock it is then. Thanks.

Rob Edwards

O-riginal '91GT radiator: 3 o'clock to 6 o'clock, and what looks like a molded rib to guide it in:

Chalkboss

As usual, definitive. Great picture.

ROG100

$68 in the States - I can check availability tomorrow once Porsche gets back to work.

jpitman2

I had one in my original radiator. It failed (rad) with the top inlet breaking off the tank a few years ago. I got an aftermarket 2 cooler unit (1/3rd genuine price) to replace it. The new tank did not have the guide piece to locate the tube, so I drilled a hole through the inlet of the tank and through the guide tube and retained it with a 2-56 screw, to prevent rotation of the tube in place. This is just inside the retaining bulge on the tank inlet, so its covered by the top hose. Have had no problems since fitting.
Interesting that the original picture at the top shows a bulge in the tube that doesnt appear in pics of real items, and wasnt present in my tube either.
You could make one easily from 1.5" OD thin wall tube.
jp 83 Euro S AT 56k

Dave928S

Here's what an original piece looks like. Note the small projections which locate under the bottom of the rib, which stop it sliding back out (you can see them in robs pic ... the plastic rib inside the spigot flares out wider at the end, to capture the locating tangs underneath).

I've measured it and rather than dimension the part photo, I've just done a quick drawing which shows all the dimensions if you wanted to cut it out of flat aluminium sheet (sorry Rog ), and then just roll it to about 40 mm diameter, which makes it a spring fit inside the tank spigot.

jpitman2

Cant you get 1.5" tube in Tassy Dave ?
jp 83 Euro S AT 56k

Dave928S

Yeah ... I'm sure it would be available, although its very light gauge. It just struck me while taking the measurements, that it could very easily be made from flat sheet; which is common in that thickness, and would be dead easy to roll on a piece of plastic or other tube, to about that size to spring into the spigot. It looks to me that original manufacture may have been stamping from flat sheet and rolling (It looks like it has stamped cut edges, and it's also soft/annealed and not hard drawn like tube)

Bill Ball

Hmmm... I don't recall mine having a positioning pin, nor is the cut in the metal that narrow. This is my original 89 radiator. So, it seems it could go in any position, unlike yours and the picture in the original post. Maybe this is just my memory failing again.