scottwetzel Posted October 12, 2015 Share Posted October 12, 2015 I have a boost leak where the air comes out of the turbo and into the elbow that goes to the cooler. Mack advised me this is a common problem once the turbo is replaced and the elbow should be replaced too. They siliconed the mating surfaces and said if that doesn't work replace the elbow. The problem is Mack no longer makes the elbow! So now I'm gonna have a boost leak forever?? I used to get 22 psi of boost now I'm only getting 18 psi. I provided a picture of the elbow. Any help would be appreciated. Quote Link to comment Share on other sites More sharing options...
scottwetzel Posted October 12, 2015 Author Share Posted October 12, 2015 The part number for the elbow is 5md4157m. I'm striking out on finding it. Quote Link to comment Share on other sites More sharing options...
farmer52 Posted October 12, 2015 Share Posted October 12, 2015 Did you send a note to Barry? Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
scottwetzel Posted October 12, 2015 Author Share Posted October 12, 2015 Nope.... Who's barry? Lol Quote Link to comment Share on other sites More sharing options...
Outbehindthebarn Posted October 12, 2015 Share Posted October 12, 2015 Nope.... Who's barry? LolParts guy at Watts Mack here in PA. (724) 668 2201 Quote Fun is what they fine you for!My name is Bob Buckman sir,. . . and I hate truckers. Link to comment Share on other sites More sharing options...
scottwetzel Posted October 12, 2015 Author Share Posted October 12, 2015 Parts guy at Watts Mack here in PA. (724) 668 2201Just called him, no luck. No one has the part. Like I said I'm trying to find the part because it's leaking boost right at my new turbo. Any ideas? Quote Link to comment Share on other sites More sharing options...
j hancock Posted October 13, 2015 Share Posted October 13, 2015 Something might be found used? Might be a leaker also.I guess I would take it apart and clean everything really well. Put another coat of high temp RTV on and put it back together. It seems most RTV labels say fully cured after 24 hrs so maybe try to do the fix when you park the truck on Friday afternoon then let it sit.If you can clearly see the damage on the turbo pipe, maybe try to use some epoxy to repair it. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
41chevy Posted October 13, 2015 Share Posted October 13, 2015 Last resort. walk into an Industrial Electrical supply and see if they have an pvc elbow for electrical conduit that matches ID and OD or a plumbing supply for PVC Natural Gas pressure pipe elbow Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
Vladislav Posted October 13, 2015 Share Posted October 13, 2015 (edited) I don't actually know of what a kind the mating end is but I would buy a 90 degree piece of stainless pipe and weld up some flange to be fitted on turbo. Something like in the picture. Edited January 31, 2020 by Vladislav Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment Share on other sites More sharing options...
41chevy Posted October 14, 2015 Share Posted October 14, 2015 I don't actually know of what a kind the mating end is but I would buy a 90 degree piece of stainless pipe and weld up some flange to be fitted on turbo. Something like in the picture.That white PVC elbow has a MACK logo and part number on it! Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
carlotpilot Posted October 14, 2015 Share Posted October 14, 2015 any good machine shop can make an insert to match both ends - press fit it into the pipe you now have -- machine the turbo end to fit- clamp it back on 2 Quote Link to comment Share on other sites More sharing options...
felicello122 Posted October 17, 2015 Share Posted October 17, 2015 I may have that elbow need to check my storage Quote Link to comment Share on other sites More sharing options...
scottwetzel Posted October 17, 2015 Author Share Posted October 17, 2015 After the Mack dealers failed attempt to reseal it and then they told me I need to get a elbow that is no longer available I removed the elbow cleaned it really good put a new seal and new clamp and it's back to normal. The clamp has been updated since 1988 and is completely different. The Mack dealer never told me that! Thanks for everyone's help! 1 Quote Link to comment Share on other sites More sharing options...
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