Keith Browning Posted March 5, 2021 Share Posted March 5, 2021 Anyone see this before? What did you find? Heavy towing and has a history with a failed CAC. Quote Link to comment Share on other sites More sharing options...
YukonTyler Posted March 5, 2021 Share Posted March 5, 2021 Last one I saw was on a 3.0 Escape with a plugged catalyst on bank 1 ; ) Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted March 6, 2021 Author Share Posted March 6, 2021 A restricted exhaust might do it but wouldn't you think there might be elevated EBP or DPF pressure codes? I said might. A biased sensor could be a possibility but I usually see MAF/MAP codes when something is off. Melted intake tubes also come to mind. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted March 7, 2021 Share Posted March 7, 2021 Initially would suspect the CAC system. I have had many that melt the cold side CAC tube if the secondary system runs low on coolant. Second I would suspect the possibility of the EGR cooler bypass sticking closed, causing high temp EGR injection into intake stream. 1 Quote Link to comment Share on other sites More sharing options...
8WA Sman Posted March 11, 2021 Share Posted March 11, 2021 What about a RH T-Stat or secondary radiator problem? Stock truck? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted March 14, 2021 Author Share Posted March 14, 2021 All good suggestions. FYI I am not personally working with this and some details I just don't have. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted March 17, 2021 Share Posted March 17, 2021 Too much nitrous! Quote Link to comment Share on other sites More sharing options...
Dane M Posted December 6, 2023 Share Posted December 6, 2023 I know this is an older thread, but did it ever get resolved/ root cause?Im working on a 17 450 that has melted the intake manifold like this. I replaced intake manifold and when driving it sounds like it still has boost pressure escaping. it will build 35 psi but truck is sluggish. anything over 28 pounds you can hear air noise. the truck has no emissions present. I have pressure tested with air the intake to 30 lbs and cant hear any leaks. I dont see any soot around any of the exhaust indicating a leak. I am not sure if the turbo is leaking internally? Or could one of the flexpipes be broken causing this? Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted December 7, 2023 Author Share Posted December 7, 2023 This was a post that was born from a public forum TDS and the poster never followed up on what the outcome eventually was. The truck is deleted, tuned and has aftermarket parts on it if that makes any difference. Here is the link ---> Intake manifold blowing up. | The Diesel Stop WWW.THEDIESELSTOP.COM Would anyone have any idea why I keep blowing a hole in my intake when towing heavy? I know my intercooler was bad and pumping... Quote Link to comment Share on other sites More sharing options...
Dane M Posted December 7, 2023 Share Posted December 7, 2023 I read that a couple months ago and it sounds like the turbo is the culprit, but I was trying to determine if it fixed anything? From what I have seen with the turbos on the 67 is they are either good or bad, not really in-betweeen? Quote Link to comment Share on other sites More sharing options...
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