techboy Posted October 4, 2022 Report Share Posted October 4, 2022 My power steering pump is leaking ... again. I rebuilt it once when I restored my car, and it was fine for a while and then it started to drip maybe 2 years ago, now it's leaking significantly. Last I checked on Rockauto the rebuild kits weren't available anymore (I do still have one more spare one I bought back in the day). So this leads to my question ... is there another pump option for an OEM setup? I have probably 5 DSM pumps laying around. Haven't looked, but maybe one of those will mount? They run on power steering fluid though. The starquests run on ATF. That's another question ... is it the starquest steering box that requires the ATF or it is the pump? I'm not super knowledgeable about steering system to be honest. It's just kinda one of those parts of a car that exists to me and I don't mess with much ... but I'm tired of this leak. Curious what you guys have to say and what options I have. TIA. Link to comment Share on other sites More sharing options...
tux Posted October 4, 2022 Report Share Posted October 4, 2022 (edited) I can't help but I had this issue with my 2nd starion. Rebuilt it with rock auto kit and it leaked, rebuilt it with a kit from autozone and it leaked, bought a reman from autozone, leaks after a year. Starting to consider an electric rack conversion. Edited October 4, 2022 by tux Link to comment Share on other sites More sharing options...
techboy Posted October 4, 2022 Author Report Share Posted October 4, 2022 40 minutes ago, tux said: I can't help but I had this issue with my 2nd starion. Rebuilt it with rock auto kit and it leaked, rebuilt it with a kit from autozone and it leaked, bought a reman from autozone, leaks after a year. Starting to consider an electric rack conversion. Yeah, I know I've talked to a few members from here I know personally outside the forum and everyone has the same issue with the power steering pump leaking. Link to comment Share on other sites More sharing options...
tux Posted October 4, 2022 Report Share Posted October 4, 2022 12 minutes ago, techboy said: Yeah, I know I've talked to a few members from here I know personally outside the forum and everyone has the same issue with the power steering pump leaking. yea, it stinks, ATF eating away my driveway Link to comment Share on other sites More sharing options...
obsolete Posted October 4, 2022 Report Share Posted October 4, 2022 I know it's a hack fix, but I can say from experience that Lucas power steering stop leak works. My steering box was leaking, so I drained the reservoir, filled it with Lucas, and drove the car for a while. I thought it might just slow down the leak until I got a chance to fix it properly, but the leak completely stopped. I know it still needs to be fixed the right way someday, but the results were way better than I expected. The only downside is that it's noticeably thicker than ATF, so the pump is a little noisy in cold weather Link to comment Share on other sites More sharing options...
psu_Crash Posted October 4, 2022 Report Share Posted October 4, 2022 I can tell you that if you put power steering fluid in that it will make a MESS! IIRC the ATF has better anti-foaming and high temp properties. That's why we use it. Call these guys. Send it off and you will not regret it https://redheadsteeringgears.com/ Link to comment Share on other sites More sharing options...
tux Posted October 4, 2022 Report Share Posted October 4, 2022 4 hours ago, techboy said: My power steering pump is leaking ... again. I rebuilt it once when I restored my car, and it was fine for a while and then it started to drip maybe 2 years ago, now it's leaking significantly. Last I checked on Rockauto the rebuild kits weren't available anymore (I do still have one more spare one I bought back in the day). So this leads to my question ... is there another pump option for an OEM setup? I have probably 5 DSM pumps laying around. Haven't looked, but maybe one of those will mount? They run on power steering fluid though. The starquests run on ATF. That's another question ... is it the starquest steering box that requires the ATF or it is the pump? I'm not super knowledgeable about steering system to be honest. It's just kinda one of those parts of a car that exists to me and I don't mess with much ... but I'm tired of this leak. Curious what you guys have to say and what options I have. TIA. I think it's the steering gear box that requires the ATF, not the pump Link to comment Share on other sites More sharing options...
techboy Posted October 4, 2022 Author Report Share Posted October 4, 2022 2 hours ago, psu_Crash said: I can tell you that if you put power steering fluid in that it will make a MESS! IIRC the ATF has better anti-foaming and high temp properties. That's why we use it. Call these guys. Send it off and you will not regret it https://redheadsteeringgears.com/ Crash ... the link you gave .. are you talking about having the box rebuilt, or the pump? Or both? My post is about the pump. (knock on wood I haven't had any issues with my steering box yet). Link to comment Share on other sites More sharing options...
TexasQuest Posted October 4, 2022 Report Share Posted October 4, 2022 5 hours ago, psu_Crash said: I can tell you that if you put power steering fluid in that it will make a MESS! IIRC the ATF has better anti-foaming and high temp properties. That's why we use it. Call these guys. Send it off and you will not regret it https://redheadsteeringgears.com/ These guys only rebuild the steering gearbox to my knowledge , not the pump. Link to comment Share on other sites More sharing options...
TexasQuest Posted October 4, 2022 Report Share Posted October 4, 2022 7 hours ago, tux said: I can't help but I had this issue with my 2nd starion. Rebuilt it with rock auto kit and it leaked, rebuilt it with a kit from autozone and it leaked, bought a reman from autozone, leaks after a year. Starting to consider an electric rack conversion. MB350395 Mitsubishi OEM Genuine SEAL KIT, P/S OIL PUMP | eBay Link to comment Share on other sites More sharing options...
BlueCuda Posted October 5, 2022 Report Share Posted October 5, 2022 I have run the lucas stop leak stuff for about 1600 miles now. Not even a drip and it all works great. I have never run anything else in it but it looked like at one point this car had a massive leak so I just started with the Lucas when I swapped the G54 out and got this car running. Link to comment Share on other sites More sharing options...
techboy Posted October 5, 2022 Author Report Share Posted October 5, 2022 21 hours ago, TexasQuest said: These guys only rebuild the steering gearbox to my knowledge , not the pump. That's what I thought too. 20 hours ago, TexasQuest said: MB350395 Mitsubishi OEM Genuine SEAL KIT, P/S OIL PUMP | eBay Thanks for the link Texas. I may go over and grab this since they're getting hard to find. Link to comment Share on other sites More sharing options...
TexasQuest Posted October 5, 2022 Report Share Posted October 5, 2022 1 hour ago, techboy said: That's what I thought too. Thanks for the link Texas. I may go over and grab this since they're getting hard to find. Your welcome. Yeah I stock up on stuff like this while it's still available. Link to comment Share on other sites More sharing options...
psu_Crash Posted October 6, 2022 Report Share Posted October 6, 2022 On 10/4/2022 at 3:20 PM, techboy said: Crash ... the link you gave .. are you talking about having the box rebuilt, or the pump? Or both? My post is about the pump. (knock on wood I haven't had any issues with my steering box yet). Yeah ... i misread your issue. They just do the boxes. Link to comment Share on other sites More sharing options...
techboy Posted October 7, 2022 Author Report Share Posted October 7, 2022 21 hours ago, psu_Crash said: Yeah ... i misread your issue. They just do the boxes. No problem. We still like you. 😄 1 Link to comment Share on other sites More sharing options...
varzaman Posted October 17, 2022 Report Share Posted October 17, 2022 On 10/6/2022 at 1:13 PM, psu_Crash said: Yeah ... i misread your issue. They just do the boxes. Your mistake is my gain, because I'm gonna need to send my box to get rebuilt and you just gave me a lead. Link to comment Share on other sites More sharing options...
psu_Crash Posted October 17, 2022 Report Share Posted October 17, 2022 11 hours ago, varzaman said: Your mistake is my gain, because I'm gonna need to send my box to get rebuilt and you just gave me a lead. I promise you won't regret it! Link to comment Share on other sites More sharing options...
techboy Posted October 20, 2022 Author Report Share Posted October 20, 2022 Bought the rebuild kit Texas linked up. Last time I used a kit I bought off of RockAuto. This seems like an actually Mitsu one. So maybe I'll have better luck. Maybe when I rebuild this one I'll do a tutorial. I still have a pdf document on how to do it that BuGG sent me from some other member. But that info appears to be lost now. Link to comment Share on other sites More sharing options...
TexasQuest Posted October 21, 2022 Report Share Posted October 21, 2022 There used to be a how-to write up on here before the board crashed. A new one would be much appreciated. 🙂 Link to comment Share on other sites More sharing options...
techboy Posted November 27, 2022 Author Report Share Posted November 27, 2022 Just an update to this thread ... the link Texas posted on eBay ... I purchased the rebuild kit ... waited about a month and then with no communication or warning I got a full refund. Guess they are NLA. So, I'm not sure what I'm gonna do. I have some DSM power steering pumps laying around. I think I'm gonna see if there's not some way to make one of them work on the car using the OEM bracket over the winter. Link to comment Share on other sites More sharing options...
TexasQuest Posted November 28, 2022 Report Share Posted November 28, 2022 I've ordered parts from japan before that are NLA here. Nengun and Amayama are good sites. Buy Genuine Mitsubishi MB350395 Seal Kit,p/s Oil Pump. Prices, fast shipping, photos, weight - Amayama Link to comment Share on other sites More sharing options...
tux Posted November 28, 2022 Report Share Posted November 28, 2022 14 hours ago, TexasQuest said: I've ordered parts from japan before that are NLA here. Nengun and Amayama are good sites. Buy Genuine Mitsubishi MB350395 Seal Kit,p/s Oil Pump. Prices, fast shipping, photos, weight - Amayama I've had mixed results w/ Nengun Like charging shipping for an entire order when only 1/9 items were available. Link to comment Share on other sites More sharing options...
kev Posted November 29, 2022 Report Share Posted November 29, 2022 The bearing inside wears with time. These PS pumps frustrate the heck out of me. I have the photos for the rebuild but I never put up a thread because the pump still leaked after rebuild...twice, even with a high end double lip seal. Then I had another one that didn't leak but wouldn't build pressure. For how simple these things are, they've given me so much grief. Link to comment Share on other sites More sharing options...
techboy Posted November 30, 2022 Author Report Share Posted November 30, 2022 11 hours ago, kev said: The bearing inside wears with time. These PS pumps frustrate the heck out of me. I have the photos for the rebuild but I never put up a thread because the pump still leaked after rebuild...twice, even with a high end double lip seal. Then I had another one that didn't leak but wouldn't build pressure. For how simple these things are, they've given me so much grief. I read a week ago or so where you replied with the same info about the wear on the bearing ... which is why I'm not interested in rebuilding this again. Seriously, I probably only have 1500-1000 miles on this rebuild. I'd like to find an alternate pump solution. Link to comment Share on other sites More sharing options...
GoldStar Posted November 30, 2022 Report Share Posted November 30, 2022 I've always wanted to do a Prius electric power steering setup, planning to do it when I get around to the rack conversion. The Prius units provide the power assist in the steering column, and from what I understand, we have enough space under the dash to make it work. Requires some fabrication obviously, but I do remember a couple of guys in the Facebook groups who have done it successfully. Link to comment Share on other sites More sharing options...
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