dpuma8 Posted December 1, 2016 Share Posted December 1, 2016 I have a GT30 turbo and the coolant feed banjo bolt leaks. I tried to anneal the copper washers that came with the bolt but it still leaks so I bought these washers that have rubber on the inside of them http://www.torkteknology.com/14mm-banjo-seal-washers-tork-tek-cummins-bs14mm/ Will these work or does the turbo get too hot to run these rubber washers so I need the copper ones? Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted December 2, 2016 Share Posted December 2, 2016 Mack trucks use those type washers for their turbo coolant supply on the mp7 and mp8 engines. Those you linked to show to be for fuel and may or maynot handle the heat. I have a dozen mack washers but they're 16mm. Quote Link to comment Share on other sites More sharing options...
softopz Posted December 6, 2016 Share Posted December 6, 2016 Definitely need copper washers ! You may want to take your banjo to a autoparts store find the tightest one you find it cannot be even a little bit loose. Auto parts store usually stock up on Raybestos copper brake washers they will do fine. Quote Link to comment Share on other sites More sharing options...
Milenko2121 Posted December 7, 2016 Share Posted December 7, 2016 I tried different washers and I got the copper crush washers(flat on one side, arched on other), no leaks ever since. Quote Link to comment Share on other sites More sharing options...
Tony D Posted December 13, 2016 Share Posted December 13, 2016 how did you anneal them, it's not the same as annealing iron/steel... in fact, the process is the direct opposite! To anneal copper you heat it red hot with a torch and then drop it in chilled water.DIRECT opposite of annealing iron/steel alloys. If you let it air cool, you HARDENED the copper washer.Don't know what you did, but thought for the record it might be helpful to point out this important difference.I've annealed copper crush rings countless times and reused them. Rarely will I buy new anymore. Quote Link to comment Share on other sites More sharing options...
dpuma8 Posted December 14, 2016 Author Share Posted December 14, 2016 I heated the copper rings until it got red and let it cool off. That didn't work so I bought 10 new copper washers and it steal leaks ridiculously bad. I have the copper washers on both sides of the bolt but it is always the same result. The top crush washer leaks at a rate of a drip a second. Can I use the rubber washer in place of the top crush ring that is further away from the turbo? How tight do I need to tighten the fitting? I have them tightened pretty tight and am afraid I will strip something if I go too hard. Bought a new banjo bolt and more washers so let me see how that goes. Quote Link to comment Share on other sites More sharing options...
Tony D Posted December 15, 2016 Share Posted December 15, 2016 ^^^Yeah, that hardened the washer... Crush Washers are very high pressure tolerant when clean. Make sure what you're assembling is clean clean clean, and torque the fittings properly to seat the banjo into the copper and the copper against the clean dry turbo machined surface.I have seen turbos with the old crush washers stuck on them, where people tried to seal over another washer...doesn't work!Blow everything off with contact or brake cleaner and watch exactly where the leak comes from...it may be from somewhere else and migrating to look like it is coming off the crush washer. Quote Link to comment Share on other sites More sharing options...
Chickenman Posted December 16, 2016 Share Posted December 16, 2016 For the water Banjo's you can use aluminum washers. Factory part on Euro turbo cars. Softer than most common Copper washers found at Napa, Autozone etc. Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted January 23, 2017 Share Posted January 23, 2017 I took a walk through the junkyard when I needed the proper length bolts and found many cars have the proper size (and longer/shorter) used for various coolers. A 20 minute walk netted me 8 bolts and a bunch of washers. Quote Link to comment Share on other sites More sharing options...
dpuma8 Posted February 4, 2017 Author Share Posted February 4, 2017 I replaced the Banjo Bolt Hose fitting and added the aluminum washers a few weeks ago and no leaks. Thanks for the advice. Quote Link to comment Share on other sites More sharing options...
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