Threads in oil filter housing

Kevin 1G Drummer · 03-15-2008

I was just wondering what the threads are in the auxiliary ports in a 90 oil filter housing. I have an aftermarket gauge, and the sending unit uses 1/8" NPT threads. Anyone know if this will thread right in, or will I need an adapter?

turbotalon1g · 03-15-2008

You will need an adapter or a tap.

**scheides** · 03-16-2008

Something tells me its bigger than that....3/8" NTP?

Kevin 1G Drummer · 03-16-2008

The sticker on the sending unit, and the installation manual says it's 1/8 -27 NPT threads. Also, Anyone know where to get the necessary adapter? And what are the stock threads?

TkrPerformance · 03-16-2008

we can take the one out of my talon and got to the hardwear store to the part or I might have one some were

User Name · 03-17-2008

Are all filter housings the same? I plan on getting the Elec. Prosport Oil Press. Gauge so I guess I may need to worry about the same thing?

Kevin 1G Drummer · 03-17-2008

If you have one that would be cool Mark. Or we could do like you said and use the one from your Talon for reference.

**asshanson** · 03-26-2008

I just installed mine tonight, and my prosport oil pressure sending unit screwed right into my filter housing. Not sure exactly which year housing I have though (it's forward facing). The threads on my stock sending unit were identical, and since my stock gauge never worked, I just replaced the stock sending unit with the aftermarket one.

But I have a question, what is normal oil pressure at idle and/or higher rpms for our cars at the filter housing? The gauge only goes to 100, but I think I was seeing something like 70 or 80 psi at idle when I tested it for a second.

EDIT: fyi, the motor was cold, and I don't have balance shafts.

Kevin 1G Drummer · 03-26-2008

^^ Do you have the oil filter housing with the external cooler? That's what I have. I can't say for sure, but for a cold engine with no balance shafts, 70-80 psi at idle seems pretty good. What weight oil are you using?

**asshanson** · 03-26-2008

I think I have the external cooler, I have the 90 waterpipe and soon the t-stat housing as well with only one water line for the turbo. The 1/8" npt threads were on the bottom of the filter housing, and the larger 3/8" or whatever threads are on the back side of the housing, but that one is plugged.

Yea once my car warmed up I have like 7 or 8 psi at idle, and 40-50 psi at 2500rpm. Using 10w-30 I think right now, no balance shafts.

Kevin 1G Drummer · 03-27-2008

Nice. I'll have to try that out when I do my oil change tomorrow after work. My stock sending unit has been acting weird lately, and stopped working completely today.

**Kracka** · 03-27-2008

Your values sound correct Andrew. My Defi gauge in the Evo shows a bit higher values than yours does.