oil pumps.. 3.0/3.2 for build up?

[NovaSS]

I have two engines Im building, first a mild 1994 3.0 bored to 3.2

The other will be a 1995 3.2 bored to 3.3 with forged pistons.

Right now I have two pumps/ pans, one for a 3.0 and the other off the 3.2

My question , should I use my 3.2 pump and pan on the mild 3.0 and find another 3.2 pump and pan for the 3.3 or should I just run the 3.0 pump/ pan on the bored 3.0 ?

Or in other words how good is the 3.0 pump on a 280 HP motor with factory clearances??

 

[Phoenix]

I was always told the 3.0 and 3.2 had the same oil flow , some myth is that the 3.2 has a tiny more flow.

Nontheless Id use the 3.0 one without a sweat.

BTW the 3.0 pan and 3.2 pan has a differant location for the oil level sensor , one is in the back one on the front , if you swap them , you will need to re-wire that sensor.

 

[SASHO91]

I'd use whichever pump is in better condition. Pull 'em apart and check. And ditto on the flow between the two.

 

[ManySHOs]

John Hrinsin recently took some measurements of a 3.0 and a 3.2 pump and posted the following to yahoogroups:

"Here are the dimensions for the 3.0L and 3.2L V6 oil pumps;

3.0L 3.2L

inlet port ID 0.768" 0.793"
Gerotor width 0.313" 0.392" 25% increase
outlet port ID 0.474" 0.474" "

It's been known for awhile that the geartor on the 3.2 pump is wider than some (if not all) of the 3.0 pumps. I wouldn't be surprised if the 3.0 pumps were updated to 3.2 specs at some point but I don't know one way or another. I used a good condition 3.2 pump and haven't looked back after 30K+ miles.

Ian

 

[SASHO91]

There ya go. However, I still stand by my other comment. If the 3.0 pump is in better condition, use it.

 

[AREA 91]

I've used both with sucess as well.
Remember the 3.2 pump will leave a gap in the timing cover vs the 3.0.