Exhaust bolts Part of maintenance ? New to me!!!

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Old man

New Member
Mar 14, 2019
15
4
3
Truck Year
2015
Ok guys listen to this! 2015 Ed. Exhaust bolt broken just before cat on a family trip. While on highway def warning lite kicks on. Must be service at dealer or shut down 200 miles. I get to my destination find a dealer down here in cape May nj. Recall was done 5,000 miles ago so I’m thinking ok has something to do with recall nope!! My exhaust bolt snapped for no apparent reason and created a vacuum that sucked def into intake and wiped out injectors !! Truck is in shop now as I’m still on vacation. Be aware!!! Check all exhaust bolt regularly!! These trucks have domino effect Poor design. Trucks should be bought back!!!
 

John

Active Member
Nov 13, 2015
630
195
43
Never heard of such a thing. The following doesn't even sound possible to me. " created a vacuum that sucked def into intake and wiped out injectors !! " The SCR (where DEF is injected) is so far downstream from the intake manifold there's no way DEF was sucked into the intake manifold. So the theory is the DEF was sucked back from the SCR, through the DPF and reversed through the turbo and injected into the intake?? Not sure what those guys are smoking but it must be good stuff. :)
 

Luc_sko

New Member
May 29, 2019
16
5
3
Southwest PA
Truck Year
2014
Yeah I agree with above. I don’t see how that is possible. If your referring to the V band on the flange just above the DPF the turbo would just keep pushing exhaust out where the Vband is. No way would it suck anything back up in.
 

cds13ca

New Member
Jun 19, 2019
18
8
3
Truck Year
2016
Yeah I agree with above. I don’t see how that is possible. If your referring to the V band on the flange just above the DPF the turbo would just keep pushing exhaust out where the Vband is. No way would it suck anything back up in.
Me too, I've taken my DEF injector off regularily to clean it out, and it's so far back away from the intakes, that doesn't even seem physically possible... I think you're being taken for a $$$$ ride.
 

John

Active Member
Nov 13, 2015
630
195
43
Ok guys listen to this! 2015 Ed. Exhaust bolt broken just before cat on a family trip. While on highway def warning lite kicks on. Must be service at dealer or shut down 200 miles. I get to my destination find a dealer down here in cape May nj. Recall was done 5,000 miles ago so I’m thinking ok has something to do with recall nope!! My exhaust bolt snapped for no apparent reason and created a vacuum that sucked def into intake and wiped out injectors !! Truck is in shop now as I’m still on vacation. Be aware!!! Check all exhaust bolt regularly!! These trucks have domino effect Poor design. Trucks should be bought back!!!
After re reading this post I'm wondering if the dealer is actually saying an exhaust bolt near the DEF injector broke and caused a leak that somehow damaged the DEF injector.
 

Old man

New Member
Mar 14, 2019
15
4
3
Truck Year
2015
Picking up Friday I’ll have the whole break down of parts and what was done. I’ll will update later