6.7 bad engine - Ford Powerstroke Diesel Forum
6.7 Motor Problems 6.7 Motor Problems

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Old 03-15-2013, 04:31 PM
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6.7 bad engine

I have a 2011 F350 chassis cab that has 87000 miles. It started knocking and running rough without any kind of warning. Took it to dealer and now they are putting a new long block, new heads, and new fuel system in it. I asked the service manager what was wrong with old engine and he said that ford sent them a memo that said "if the engine in these trucks have a knocking sound, do not tear them down just send back to ford and replace with new engine because they are having a lot of problems with them." I assume they are talking about the early chassis cab's. The service manager assumed that the new long block and heads had some kind of upgrade but said that ford didn't tell him. Does anyone know if ford has tried to fix this problem with the early chassis cab 6.7's?
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Old 03-15-2013, 05:00 PM
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Originally Posted by booneandbuck View Post
I have a 2011 F350 chassis cab that has 87000 miles. It started knocking and running rough without any kind of warning. Took it to dealer and now they are putting a new long block, new heads, and new fuel system in it. I asked the service manager what was wrong with old engine and he said that ford sent them a memo that said "if the engine in these trucks have a knocking sound, do not tear them down just send back to ford and replace with new engine because they are having a lot of problems with them." I assume they are talking about the early chassis cab's. The service manager assumed that the new long block and heads had some kind of upgrade but said that ford didn't tell him. Does anyone know if ford has tried to fix this problem with the early chassis cab 6.7's?
This is interesting, sorry to hear about the problem. But hey your getting a new motor under warrenty right? Thats sweet!

I just wanted to subscribe to this thread, and see what anyone else says.
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Old 03-15-2013, 08:15 PM
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BAD GLOW PLUG DESIGN,CAUSING TIP TO BREAK AND DO SOME INTERNAL DAMAGE.
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Old 03-15-2013, 08:17 PM
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Originally Posted by nj powerstroke View Post
BAD GLOW PLUG DESIGN,CAUSING TIP TO BREAK AND DO SOME INTERNAL DAMAGE.
Really? Do you have an article, or a link?
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Old 03-15-2013, 08:21 PM
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UMM NO NO ARTICLE OR LINK HAD THE PLEASURE OF PREFORM THIS DIAG AND REPAIR
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Old 03-16-2013, 12:08 AM
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also the regen system and all that heat aint helping either.
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Old 03-16-2013, 06:41 AM
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Yes it is still under warranty. They did say that one cylinder had no compression and that the glow plug was busted. So have they changed anything to keep this from happening again?
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Old 03-17-2013, 08:53 PM
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yes they did change the glow plug design
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Old 03-20-2013, 04:20 AM
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6.7 bad engine

Also some early build chassis cab exhaust seats didnt get hardened and causing seats to sink into heads resulting in broken glow plug tips.all replacement parts will resolve issue.


Sent from AutoGuide.com Free App
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Old 03-24-2013, 01:06 PM
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chris7686 good point, seen them cracked never pushed in. they caught this issue early? interesting.Still cant see delivering raw fuel passed valves and into the exhuast for regen is a good idea.
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