What is the difference between 93+ N/A and 93+ TT Oil Pump

[IcelandGTO]

3sx sells them as a two types of pumps , i cant see any difference. I can get a new oem N/A pump locally cheap

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash4/p480x480/247784_10151641149577941_443982137_n.jpg

3SX Performance - OEM Oil Pumps Comparison 3000GT / Stealth*-*Mitsubishi 3000GT*/*Dodge Stealth Parts (http://www.3sx.com/faq/oilpumps/)

[GTOJOE]

What part numbers? for the GTO they are the same after 95 between the TT and the NA. Before 95 they are a different part number.

92-99 for the USDM VR-4 is MD190982. Non turbo part number is MD190981

[green-lantern]

I'm pretty sure they are the same. It's been a bit but I'm pretty sure I used a 2nd gen NA pump on a 93+ TT engine.

Be careful about a cheap oil pump.

[mb3000]

IIRC the OPRV spring pressures are different to accommodate the turbochargers.

[GTOJOE]

I thought about this after I posted and realised Mitsubishi ASA has the option of looking at each internal part so I will try to compare the internals tomorrow. I suspect that is where the difference will lay.

Sent from my GT-I9300 using Tapatalk 2

[SUTHNR]

The difference is in the pressure spring. Other than that, the same. Not sure WHAT the pressure difference is...

EricB

[green-lantern]

The difference is in the pressure spring. Other than that, the same. Not sure WHAT the pressure difference is...

EricB

Interesting, I've never even thought about it but I'm sure I used an NA pump on my build because it was low mileage and I ran out of cash during my build. I wonder what kind of issues that could cause. Too much pressure on Turbo seals? Not enough pressure?

I'm glad OP made this thread. Gives me something else to worry about :lo5l: Seriously though, I'd like to know more.

[GTOJOE]

I looked this up again in ASA. The spring is different [as stated above]. Everything else is the same. I assume you could just swap the spring over from the old one if it's still OK. Alternatively you could buy a new TT spring.

Spring = MD174687

So the correct part number for the TT is MD190982 however if you can get hold of part number MD190981 it is identical except the spring so just buy the above spring or swap your existing one. There are some other variations in the real early models though. If the part is different from either of the above then the spring will be different again.

[Memphetic]

I'm pretty sure they are the same. It's been a bit but I'm pretty sure I used a 2nd gen NA pump on a 93+ TT engine.

Be careful about a cheap oil pump.

Probably still better than the OEM one I got that (I believe) broke in 20 miles ;)

[DrGonzo]

Correct, the spring is the only difference. The TT pump has a stiffer spring to accommodate the extra pressure needed to allow the oil to flow through not only the turbos but the oil cooler. My current Boosted 10:1 engine has an N/A pump in it and I have not noticed any issues with oil pressure but I am also a stock configurations as far as turbos and oil cooler. If you upgrade either of those I would say a TT spring would be required the circulate the extra volume.

[green-lantern]

Probably still better than the OEM one I got that (I believe) broke in 20 miles ;)

You got one of the "bad batch" oil pumps huh? Did it ruin your engine?