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Old 10-31-2018, 09:23 AM   #1
Scooby Newbie
Member#: 493244
Join Date: Oct 2018
Default Fuel pump size

Hey guys, new to the forum. I have a 1995 subaru legacy 2.2 awd. Im trying to order a new fuel pump, however i see that there are 3 sized options in diameter. There is 1 inch, 1-1/2 inch (38mm), or 2 inch. What size diameter is my fuel pump and why on earth are there this many different styles of fuel pump for the same vehicle?
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Old 10-31-2018, 10:03 AM   #2
Patrick Olsen
NASIOC Supporter
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
1997 Legacy 2.5GT
1996 Impreza coupe


I assume you're looking on Rock Auto? I only see 1 mention of a 1" pump; all the rest of the listings are 38mm/1.5" or 2", which makes me think the 1" pump listed may be wrong. If that assumption is correct, then you're looking at just two possibilities. Maybe '95 was a transition year and that's why there are two different pumps? I dunno.

From what I can tell (again, looking at the RA listings), the 1.5" pump has spade connectors for a harness plug on top, while the 2" pump has screw-on terminals for the wiring. If it comes down to it, you might have to pull the pump out enough so you can see how the wiring attaches to the top and order based on that.

Not all of the listings mention FWD or AWD, but every listing that does state AWD is for the 2" pump. That's hardly proof that 2" is what you need, but it makes me think that's the answer.

If I were you, I'd figure out which brand I wanted to go with, then order one of each size and return the one I don't need.
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Old 11-01-2018, 05:26 PM   #3
Scooby Specialist
Member#: 201277
Join Date: Jan 2009
Chapter/Region: MAIC
Location: Arlington VA
2008 08 QSM 5MT LGT


On a side note that is a SUPER CLEAN Wagon

I would pull the pump first then order it as downtime isnt and issue.
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