doctorbrody Posted December 12, 2012 Share Posted December 12, 2012 I was leaving a small puddle of fuel in the driveway every time I parked with a full tank of gas, so I checked it out and it was clearly seeping from the rubber seal that mates the fuel pump to the tank. Replaced the $10 gasket (part# 42025AG04A) and everything's fixed. The old gasket looked good enough - no obvious cracks or degradation. I run straight E85 in the summers, and I'm wondering if that may have something to do with it. Anyone else have issues with E85 causing leaks? Link to comment Share on other sites More sharing options...
liljonson Posted December 13, 2012 Share Posted December 13, 2012 Did you change your pump when u went e85? If so, did you change your gasket? Sent from my Galaxy Nexus using Tapatalk 2 Link to comment Share on other sites More sharing options...
doctorbrody Posted December 13, 2012 Author Share Posted December 13, 2012 I installed a Walbro when I went E85 at 90k miles, no new gasket. It didn't start leaking for 2 years after that. Apparently I should've replaced it then. It's only a $9 part. Link to comment Share on other sites More sharing options...
liljonson Posted December 13, 2012 Share Posted December 13, 2012 Yup. I just recently replaced mine too Started leaking after 7 months after install. Sent from my Galaxy Nexus using Tapatalk 2 Link to comment Share on other sites More sharing options...
mwiener2 Posted December 13, 2012 Share Posted December 13, 2012 Only thing that causes those gaskets to leak is someone touching them. I have yet to see E85 hurt a stock part of a car. Eats plenty of aftermarket stuff though. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
doctorbrody Posted December 13, 2012 Author Share Posted December 13, 2012 What kinds of parts have you seen E85 eat? Walbros? Link to comment Share on other sites More sharing options...
mwiener2 Posted December 13, 2012 Share Posted December 13, 2012 Walbros actually seem to do just fine. Aeros and DW's I've seen fail and blamed on E85 Lots of aftermarket seals and rubbery items turn to goo. Lots of aftermarket finishes (paint) melt off real quick My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
m sprank Posted December 13, 2012 Share Posted December 13, 2012 DW pumps are e-85 tested and certified. 3 year warranty even when using e-85. e-85 is much like corn whiskey. It will eat through all kinds of materials. Also dont recommend sitting on it for long periods (in the car). While it maintains its octane better than gasoline, it can varnish a tank and gum up injectors. It is also hygroscopic. Link to comment Share on other sites More sharing options...
doctorbrody Posted December 13, 2012 Author Share Posted December 13, 2012 Interesting. I assumed E85 would be less prone to clog injectors since it's such a powerful solvent. Took a good look at my tank when I replaced the gasket - looks brand new. I use Techron additive 2-3 times a year. Link to comment Share on other sites More sharing options...
m sprank Posted December 14, 2012 Share Posted December 14, 2012 I have been told you should pickle the injectors rather than let them sit with e-85. But my in house test went better than expected. I let a tank of e-85 sit for 8 months in the car. Tank was perfect. Pulled the injectors and sent them to RC for cleaning/testing/balance. Turned out far cleaner than most I send in. But, rather than ask members to repeat my test for scientific purposes, it is easier to go with what I was taught. For long term storage, drain the fuel. If by chance the system was not air tight, the fuel could absorb moisture from the air and that would be bad. Link to comment Share on other sites More sharing options...
KBGRIZZLY64 Posted December 14, 2012 Share Posted December 14, 2012 I have been told you should pickle the injectors rather than let them sit with e-85. But my in house test went better than expected. I let a tank of e-85 sit for 8 months in the car. Tank was perfect. Pulled the injectors and sent them to RC for cleaning/testing/balance. Turned out far cleaner than most I send in. LALGT's car? Priorities change when car parts come into the equation Link to comment Share on other sites More sharing options...
m sprank Posted December 14, 2012 Share Posted December 14, 2012 Lol. Yes. Link to comment Share on other sites More sharing options...
KBGRIZZLY64 Posted December 14, 2012 Share Posted December 14, 2012 Got heem Priorities change when car parts come into the equation Link to comment Share on other sites More sharing options...
Xplosivo1 Posted October 26, 2013 Share Posted October 26, 2013 Did you do anything special when you installed the new one? I replaced my fuel pump with a DW and also replaced the gasket a few months ago. Whenever I fill the tank I can smell fuel from the car, I pulled the seat and cover plate and found the culprit. I used a shop towel and confirmed its seeping on the inside of the ring, no seepage on the outside. Before I replace it I want to make sure I'm not doing anything wrong. I'm using pump gas if it makes a difference, no E85. Link to comment Share on other sites More sharing options...
mwiener2 Posted October 26, 2013 Share Posted October 26, 2013 It's not the type of fuel. Something about the seal isn't right. You may need a new gasket. My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
doctorbrody Posted October 27, 2013 Author Share Posted October 27, 2013 Install a new gasket and torque the nuts down correctly - I went too tight and snapped a stud off. After that, to keep it from leaking I had to use a fuel-resistant liquid gasket Link to comment Share on other sites More sharing options...
m sprank Posted October 27, 2013 Share Posted October 27, 2013 Rodney, if you need assistance, just call. Link to comment Share on other sites More sharing options...
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