Popular Post fjh Posted January 5 Popular Post Share Posted January 5 So I stopped by my old shop yesterday! The boys were scheduled to do a head gasket on a customers truck 3406 E ! The truck was steaming from the crank case under load real bad! One of the guys took the bull by the horns and decided that the diagnosis of a head gasket by the customer was premature and warranted an extra look! ! We had a tool I had made up to cap the turbo exhaust and inlet to pressurize the intake system on the Mack turbos as we had blowby issues with this on our turbos before! Sure enough They put pressure to the thing and there was a steady stream of air from the drain tube! They removed the turbo caped off the the oil line ran the engine oh natur-al and all was good! So this here is just a comment For those who have similar issues and are preparing to tare into things with out checking stuff! This here saved the guy thousands of dollars ! This check can be performed on most any turbo charged engine but you have to make the tool to do it , and obviously this issue is not just a Mack turbo issue it can happen to any turbo! I have personally seen it happen a half dozen times on Asset Ai And Ac engines So any turbo charged engine can be suspect ! I have very little experience with the MP engines However I'm sure Its possible for them as well just something to watch out for! Happy new year! to All 3 1 1 Quote Link to comment Share on other sites More sharing options...
Freightrain Posted January 5 Share Posted January 5 So see if I get this. The turbo was on putting boost back into the oil drain tube, into the engine, this showing blowby. Bad turbo seal was all it was then, correct? Just a bit cheaper then head gaskets! 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
Popular Post fjh Posted January 5 Author Popular Post Share Posted January 5 1 hour ago, Freightrain said: So see if I get this. The turbo was on putting boost back into the oil drain tube, into the engine, this showing blowby. Bad turbo seal was all it was then, correct? Just a bit cheaper then head gaskets! Yup !you got the drift perfectly! point is it pays to check for things before jumping to conclusions! This is one of those times! 😎 2 2 Quote Link to comment Share on other sites More sharing options...
Mark T Posted January 5 Share Posted January 5 I got a nice CH once over this issue. 1 Quote Link to comment Share on other sites More sharing options...
Popular Post mechohaulic Posted January 5 Popular Post Share Posted January 5 I didn't think there were many ; if any dealerships that knew how to diagnose any more.. thought it was all about parts changing at $200.oo per hr till problem was fixed. how luck you and very few are in today's world to have dealership/ shop that have half an interest to problem solve. 3 Quote Link to comment Share on other sites More sharing options...
BOBWhite Posted January 6 Share Posted January 6 (edited) Most people just shoot the parts cannon and call that trouble shooting these days. Its a dying art On the note of a late Christmas gift, a guy west of me jackknifed and hit a bridge at 6:30 this morning. From what I hear he's alright but it bent the frame and tore the motor mounts out of the engine. Edited January 6 by BOBWhite 1 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted January 6 Share Posted January 6 that must have slid a ways and hit hard , lucky for driver he wasn't between trailer and bridge abutment . bend frame / rip mounts !! 1 Quote Link to comment Share on other sites More sharing options...
Popular Post mowerman Posted January 6 Popular Post Share Posted January 6 Sorry, I just had to throw this in there 28 more weeks and I won’t have to worry about any of it. And yes, I’m off-subject but as usual I’m going to blame it on Joey. It’s Joey‘s fault…. Bob 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Mean Green Posted January 7 Popular Post Share Posted January 7 Friend of mine got a big stake bed Chevy had the diesel engine right before the duramax came out guy told him the Chevy garage told him engine was junk it started ok then after about 10 min of idling it would start smoking I looked it over for him and we pulled the air inlet off the turbo and there laid the wheel busted off drove it to his house only bout a mile 500 dollar turbo and it was good as new got the truck for 2500 bucks not bad in my book 2 1 Quote If your going to be a bear be a grizzly Link to comment Share on other sites More sharing options...
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