PowerSToKed Posted August 3, 2012 Share Posted August 3, 2012 Customer states truck stalled while driving then would not restart, truck has 40,000 miles, engine sounds like a hydro locked 6.0/6.4, has a hard fault #3 glow plug code, this is my first (possible) major 6.7 failure any help, suggestions, previous experiences would be greatly appreciated Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted August 3, 2012 Share Posted August 3, 2012 Hmm, locked up, glow plug code... I say base engine failure with destroyed valves in cylinder #3. Just guessing. Keep us posted. Quote Link to comment Share on other sites More sharing options...
iceman Posted August 3, 2012 Share Posted August 3, 2012 pull the exhaust manifold to determine if the valve cracked or dropped so you dont have to tear it all the way down these happen on the cab and chassis, i also had a broken crank on a 6.7 in a pickup the crank sheared before the number 2 main cap these engines are gravy and easy to build and install so just jump in man i have buit and tore down approx 22 so far and 1 pickup 6.7 Quote Link to comment Share on other sites More sharing options...
Fordracer Posted November 7, 2012 Share Posted November 7, 2012 Hey iceman, I have a 6.7 that sheared the crank dampner bolts off and spit out the oil pump in pieces. Did this happen on the one you had that broke the crankshaft? I haven't pulled the engine yet but I'm assuming that the crankshaft broke. Quote Link to comment Share on other sites More sharing options...
YukonTyler Posted November 8, 2012 Share Posted November 8, 2012 another tech at my store had a 6.7 cab + chassis with a big cube on the back shear the crank .... major main and rod bearing damage in the middle and then the crank just said 'no more'. i remember it was up to date on maintenance and hadn't idled its whole life. the other couple that screwed up were bad valves on the left side from a pair of early build units. don't think they were locked up though, just dead holes Quote Link to comment Share on other sites More sharing options...
iceman Posted November 11, 2012 Share Posted November 11, 2012 ford racer actually mine ran, sounded like shit but it ran the dampner was still bolted on it cracked the front cover i was amazed when i tore it down only thing holding the crank in was the number 1 and 5 con rods i suspected porosity or some shit it got a long block Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted November 19, 2012 Share Posted November 19, 2012 TSB 12-11-11. Just came out on the weekend. Quote Link to comment Share on other sites More sharing options...
Aaron Posted November 19, 2012 Share Posted November 19, 2012 It doesn't actually tell you what the failure is... Just that you're replacing the long block if the glow plug is damaged. Quote Link to comment Share on other sites More sharing options...
Aaron Posted November 19, 2012 Share Posted November 19, 2012 another tech at my store had a 6.7 cab + chassis with a big cube on the back shear the crank .... major main and rod bearing damage in the middle and then the crank just said 'no more'. i remember it was up to date on maintenance and hadn't idled its whole life. the other couple that screwed up were bad valves on the left side from a pair of early build units. don't think they were locked up though, just dead holes As an aside - thats an awesome avatar picture. Quote Link to comment Share on other sites More sharing options...
sdv4x4 Posted November 23, 2012 Share Posted November 23, 2012 I just got done replacing a 6.7 for same concern. 76000 miles, Came in locked up. Pulled all glow plugs, #8 broken. Removed injector and used boroscope through hole....Had a nice view of connecting rod. So much for the bulletproof 6.7 Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 23, 2012 Share Posted November 23, 2012 I've always said from a mass produced level that the higher the power the less the reliability and the lower the power the longer it will last........the 6.7 has GOBS of power. Quote Link to comment Share on other sites More sharing options...
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