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164 Engine Conversion...Coolant Outlet Nipple Search...

Posted: Sun Jan 30, 2005 9:30 am
by MilanoMan
I'm doing the usual 164 3.0 to Milano engine conversion. The nipple for coolant output on the driver's side head is a larger diameter than the one used on the Milano/GTV6. I removed it (it needed to be destroyed in the process), assuming the nipple on my old 2.5 L head would just screw right in there. Imagine my surprise when I found out that the hole for the 164 nipple is actually larger than the old 2.5L nipple!

Oh great, a simple part that is not easy to adapt, since it is not an original Affa configuration. David in AUS has indicated the hole is for a a metric-sized hydraulic fitting, and not for a US pipe thread.

Has anybody else been through this problem? I seek advice on how to procure an adapter to fit in there, the metric size, pitch, etc. and a possible source to get the necessary parts.

Is this conversion project ever going to end (10 months and counting) ?

Thanks guys,

Posted: Sun Jan 30, 2005 9:52 am
by Barry
Its possibly one of the following-

16mm x1.5 pitch or
18mm x 1.5 pitch

Its not the 14 x 1.5 as its not the same as gtv6 std.

Save yourself a load of grief and simply tap it out to a locally available plug.

Barry

Posted: Mon Jan 31, 2005 1:08 am
by Seb
I kept the 164 nipple and adjusted it with the hose. Seems to work. To bad You destroyed it.

Seb

Posted: Tue Feb 01, 2005 8:08 am
by 81GTV6
Seb, what do you mean adjusted it?

Milanoman, Have you gone to the alfagtv6.com homepage? Under "technical" there is a FANTASTIC word document on the 164 conversion. It deals with that exact problem.

Follow up to hose nipple...

Posted: Thu Feb 10, 2005 12:44 pm
by MilanoMan
Thanks for all whom replied. :) I ended up finding the old 164 nipple in the trash bin and salvaged the theaded part. I silver soldered a 1/2" brass nipple to it and away we go. The 164 engine conversion document on this site is a great resource. What it does NOT say is how impossible it is to find metric hydraulic fittings here in the USA.

My advice to all who do this conversion: keep the old 164 nipple, buy a simple 3/4" to 1/2" inline reducer pipe at any auto parts store, then put it in the heater hose. That is what Seb meant...

MilanoMan

Posted: Thu Feb 10, 2005 1:38 pm
by David
Glad to hear you solved the problem. It just goes to show problems can be solved in many ways.

When I wrote the 3.0L conversion document it was while actually working on the engine and I was much happier doing that than typing. There are a number of things, in hindsight, that I should have added such as the size and thread details of the brass nut and tail, suppliers, etc. I had to replace mine as the original was too badly corroded and they are no longer available as a replacement part. They were not hydraulic fittings, I purchased them from a local firm (in AUS) specialising in pipe and hydraulic fittings.

The document was meant to be "live", change it and add different solutions, suppliers,etc. I would be happy to add other suggestions and alternative solutions, just send them to me via PM. My main aim was to get all the information in one place as a lot of what I did was obtained from various topics on this great site. It was designed to show other non-professional Alfa enthusiasts, these projects can be done in the home workshop.

David :)

Posted: Fri Feb 11, 2005 2:27 am
by LENZ
This is the way i did it on my 24V conversion