jzack Posted April 16 Share Posted April 16 I've got a 1994 CH with the E7350. Back in December I replaced #4,5,6 injector lines. They were leaking at the head. Now 4 months later all three have failed with small hairline cracks behind the nipple at the injector. Mack has been warrantying the lines but I'm really growing tired of replacing them every few months. Yes, I make sure all the line clamps are good and tight. The lines stay dry for weeks, maybe months and then bam, they start dripping on the manifold. My original lines were 0.25" OD, the new OEM ones from Mack are 0.23 OD I noticed. I let Mack know about this.... Do I have any other options here? Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 16 Share Posted April 16 a couple of the ones I service had the same issue.. I got pissed and took the little clamp plates out, and the issue stopped. I think the newer lines arent as good as the original lines. I think they may need to vibrate a bit without the metal clamp plates , i dont really know, because I have a few other E-7's that havent leaked.. I expect a few opinions on this one.. jojo 1 Quote Link to comment Share on other sites More sharing options...
jzack Posted April 16 Author Share Posted April 16 7 minutes ago, Joey Mack said: a couple of the ones I service had the same issue.. I got pissed and took the little clamp plates out, and the issue stopped. I think the newer lines arent as good as the original lines. Interesting, maybe I'll try that when I finally get to the end of my rope on this. Quote Link to comment Share on other sites More sharing options...
Mark T Posted April 16 Share Posted April 16 11 minutes ago, Joey Mack said: a couple of the ones I service had the same issue.. I got pissed and took the little clamp plates out, and the issue stopped. I think the newer lines arent as good as the original lines. I think they may need to vibrate a bit without the metal clamp plates , i dont really know, because I have a few other E-7's that havent leaked.. I expect a few opinions on this one.. jojo New ones don't even look like the old ones. One more thing Volvo couldn't care less about on older trucks. Quote Link to comment Share on other sites More sharing options...
Hayseed Posted April 16 Share Posted April 16 19 minutes ago, Joey Mack said: I got pissed and took the little clamp plates out, and the issue stopped. 7 minutes ago, Mark T said: I think they may need to vibrate a bit without the metal clamp plates Not Mack related But in the same vein... 40Yrs ago My father Bought a new 4240 John Deere Tractor, & one on the Fuel Lines Cracked. He got a new one under Warranty, But In the packet with the New line was a Diagram of where the Little Clamps needed to be to stop the harmonic Vibrations which caused the Cracking. I remember that Factory Placement of the Clamps was Nowhere near where they Needed to Be according to the new Diagram...!! 2 Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment Share on other sites More sharing options...
Joey Mack Posted April 16 Share Posted April 16 mabey just for kicks. split some lengths of 1/4" fuel line and slide it over the lines... I probably should have done that in the first place.. I guess mabey keep them away from the heat of the turbo, and manifold.. I dont really have a good answer.. Hayseed has good points though... jojo Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted April 16 Share Posted April 16 My old E6 keeps cracking number 1 injector line, maybe every 50,000 km, no apparent reason No clamps and no diagrams of clamps and I have asked about clamps on here before but never got a answer Anyway the new injector lines are a lot thinner than the old ones, but the old one cracked to start with so I guess that doesn't mean a lot then However I have never had any other diesel crack injector lines so dunno, must be just lucky I guess Paul Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted April 16 Share Posted April 16 The only other engine I worked on was a John Deere Dozer, and those lines were short, mabey 10" long if stretched out.. a couple of them sprung leaks at the nuts.. but thats all I can remember for now.,, jojo Quote Link to comment Share on other sites More sharing options...
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