Matt Saunoras Posted March 22, 2013 Share Posted March 22, 2013 Well I never thought much of it until today. Took a 2011 F-550 for a spin thats making some pretty obvious turbo noises. 145k on the clock, one of the higher mileage 6.7s I've seen. This thing is pretty heavy, crosses the scales at 16k lbs all day long, probably its entire life. Then I get to talk to the customer and get the whole story from oasis. This truck has had 5 turbos and 2 engines. (4 turbos and 1 engine under warranty). The most recent engine and turbo were only 20k miles ago. Normal maintenance from what I can tell and only 3300 hours on it. This thing is on the road constantly. I've gotta put front rotors, calipers and pads on it too, caliper pistons and rotors are cracked from heat Quote Link to comment Share on other sites More sharing options...
lmorris Posted March 22, 2013 Share Posted March 22, 2013 Are we thinking that having that turbo tucked down in the valley is not letting it disapate enough of the heat on loaded trucks. The only 2 turbos I have done were on F550's with full service bodies on them, that like your's are constantly loaded. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted March 23, 2013 Share Posted March 23, 2013 These guys were out of town so I slammed a turbo in this thing, put some brakes on and let it roll. Someone left a small pocket screwdriver laying down behind the turbo in the valley. All I found was a blade, magnet and one melted glob of plastic with a metal pocket clip sticking out. Also noticed that the oil feed tube and coolant feed tube both had melted the plastic retainers still attached. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted March 23, 2013 Share Posted March 23, 2013 Are we thinking that having that turbo tucked down in the valley is not letting it disapate enough of the heat on loaded trucks. There mught be something to that. If we look at the location of the turbo and what is in front of it blocking air from the fan this might be a valid concern. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted March 23, 2013 Share Posted March 23, 2013 ....plus the exhaust manifolds make a nice little blanket for the turbo. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted March 24, 2013 Share Posted March 24, 2013 I just got a turbo sent back by WPEC. The compressor wheel was damaged, not the turbine wheel as stated in the FSA. Prior to replacing the turbo, I contacted hotline, told them the the details of the failure, and that I was unsure if any foreign matter had passed through the turbo. Hotline said compressor wheels can also fail, and to continue with replacing the turbo under the FSA, providing the the air intake was properly assembled and the air filter and such were intact, as they were. WPEC did not agree, and sent it back, denying the claim. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted August 27, 2013 Share Posted August 27, 2013 Yay! Finally saw my first turbo failure today. F450 - ground up on the case and barely spins. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted August 27, 2013 Share Posted August 27, 2013 Got one getting towed in tomorrow, suspect turbo failure Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted August 28, 2013 Share Posted August 28, 2013 I took some pictures before I packed the core into the box and I just looked at them. I didn't look very close at it and probably might have still missed what the camera brought to life... so to speak. I saw the damage on the compressor side but not the turbine side. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted August 30, 2013 Share Posted August 30, 2013 I finished mine today, 2012 F-550. If I remember tomorrow I'll snap a few pics. The bearing was completely gone but suprisingly none of the turbine blades were missing. The shaft still spun with your fingers but you couldn't help but laugh when you did. Quote Link to comment Share on other sites More sharing options...
Aaron Posted September 1, 2013 Share Posted September 1, 2013 1 Quote Link to comment Share on other sites More sharing options...
DieselD Posted September 4, 2013 Author Share Posted September 4, 2013 Just got the call on one of our trucks with 81k miles has lost its 3rd turbo. They all pretty much look like the above pictures..... Quote Link to comment Share on other sites More sharing options...
lmorris Posted September 4, 2013 Share Posted September 4, 2013 Wasn't there a broadcast message stating all turbo's that have been disassembled will have the claim punted and/or the core charge not credited? Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted September 5, 2013 Share Posted September 5, 2013 Ha! I've dissassembled more than a few 6.0 turbos and cobbled them back together. Knock on wood no charged back cores yet. They did call back the 6.7 one I did last week. Actually I think they've called back all my 6.7 turbos Quote Link to comment Share on other sites More sharing options...
Aaron Posted September 6, 2013 Share Posted September 6, 2013 It was a Barney job, and no core - customer opted for "NEW". Like $2000 more than reman. They probably don't want us taking them apart so they can do failure analysis. Does anyone else remember when they'd want the super duty brake caliper, bracket, and pads all as one assembly when they'd seize up? This is probably the same idea. Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted September 22, 2013 Share Posted September 22, 2013 We had another towed in late Friday... same old funky noise from the turbo and no boost. After re-reading this topic and reading a few others on the public forums I am convinced it's a design issue. This is a turbo that has good oil flow and is also cooled with engine coolant so you might think that heat is not an issue but maybe it is. We have sited it's location and lack of external airflow and close proximity to the exhaust manifolds. The inverted cylinder head design with shorter inlet pipes also means higher exhaust gas temperatures at the turbocharger. Combine that with vehicle usage, meaning higher load, and engine calibration we have many factors to consider. I would also bet that most of the drivers of these trucks do not let the engine idle and cool down before shutting down. In all cases we have discussed all of these turbo failures have been bearing related. The turbochargers on the 6.7L are the sleeve type according to the WSM also known as a journal bearing in the industry. As I research this I have discovered that, journal type turbo bearings are more prone to heat and lubrication related failure versus ball-bearing cartridge bearings. Could this be the design change needed here? Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted September 23, 2013 Share Posted September 23, 2013 Anyone ever spun a dual boost pickup turbo with their fingers? To me it felt much different than the brass bushing turbos we are used to. Quote Link to comment Share on other sites More sharing options...
lmorris Posted September 23, 2013 Share Posted September 23, 2013 During the ECOBOOST course we were discussing turbo cool-down, the ECOBOOST turbo is designed to draw coolant after the engine is shut down by way of thermal siphoning and slowly cools the turbo. We asked if the 6.7L turbo is designed to do the same thing. They told us it wasn't but will still do it. So this takes out the cool down idle period theory I would think. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted September 23, 2013 Share Posted September 23, 2013 We asked if the 6.7L turbo is designed to do the same thing. They told us it wasn't but will still do it. So this takes out the cool down idle period theory I would think. In my 6.7 course, we were also told the turbo will thermal siphon. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted September 25, 2013 Share Posted September 25, 2013 When you think about EGTs and how oil flow abruptly stops at engine shut down it's not hard to figure out why turbo bearings coke up like they do. I really don't think post shutdown coolant flow is going to help a whole lot, most of the damage is probably done right as soon as that oil stops flowing. Quote Link to comment Share on other sites More sharing options...
cbriggs Posted September 30, 2013 Share Posted September 30, 2013 These trucks should be built with a factory turbo timer. Make it not immediately shut down the engine at key off if the egt is above predetermined level. Could make it cancelable thru the IC for emergency situations. People are too impatient to sit in the truck and let the truck idle too cool/ slow the turbo for 3 to 5 minutes. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted September 30, 2013 Share Posted September 30, 2013 I would put an accumulator on mine, like the race cars use. It would be set up to supply another quart of oil to the turbo bearings whilst the turbo is still spinning after the key is turned off. Quote Link to comment Share on other sites More sharing options...
Aaron Posted September 30, 2013 Share Posted September 30, 2013 http://www.accusump.com That's a hell of a good idea Brad. I notice now on their website they're marketing them as turbo oilers now as well. Quote Link to comment Share on other sites More sharing options...
Aaron Posted September 30, 2013 Share Posted September 30, 2013 https://www.cantonracingproducts.com/cgi-bin/commerce.cgi?search=action&category=2415 Quote Link to comment Share on other sites More sharing options...
Chase Posted October 2, 2013 Share Posted October 2, 2013 These trucks should be built with a factory turbo timer. Make it not immediately shut down the engine at key off if the egt is above predetermined level. Could make it cancelable thru the IC for emergency situations. People are too impatient to sit in the truck and let the truck idle too cool/ slow the turbo for 3 to 5 minutes. I can't believe it hasn't been done yet. Quote Link to comment Share on other sites More sharing options...
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