2.5NA Diesel oil filter housing fittings

az_max

1
Apr 22, 2005
7,450
1
I'm trying to find fittings to make custom oil cooler lines. (long story, factory lines won't work).
From what I can gather on the Interwebs I have the older version of the housing with adapters (NRC8618) to swivel oil cooler lines.
So, does anyone know what fitting screws on to the factory adapter, or the thread size of the adapter so that I can go to an AN style connector? I'm thinking it's a M25.
 

luckyjoe

Well-known member
Oct 10, 2004
287
21
New Jersey USA
I want to do a similar conversion on my 109's 2.25p. I have the filter housing with blanked ports, so I need the associated parts to thermostatically feed the oil cooler. Some where I think I have all this printed info but I'm away until Sunday...

Unless you're talking about the radiator fittings, then I'm completely lost.
 
Last edited:

az_max

1
Apr 22, 2005
7,450
1
I want to do a similar conversion on my 109's 2.25p. I have the filter housing with blanked ports, so I need the associated parts to thermostatically feed the oil cooler. Some where I think I have all this printed info but I'm away until Sunday...

Unless you're talking about the radiator fittings, then I'm completely lost.
I found the thread size today:

https://www.thexmod.com/item_detail.asp?id=1204
Oil Filter Adaptor
1/2 IN BSP Male THD - Cone seat one end

I ordered parts for JIC hose, I'll see how well they fit. I have a factory radiator, but may run a separate oil cooler in front. We'll see once I get that far.

Here's a diagram of the part numbers:

edit: changed out the 300tdi diagram for a 2.5td that's closer to the original.