intake manifold go BOOOM!! - Ford Powerstroke Diesel Forum
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Old 12-11-2011, 05:29 AM
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intake manifold go BOOOM!!

i got a truck in at work the other day and i found that the plastic intake manifold literaly exploded, truck is completly stock, customer said when he started it in the morning he heard a loud bang shortly after start-up and then he was picking up pieces of the intake off the ground. he brought them to me in a wal-mart bag. engine is locked up now, i removed the glow plugs to attemt to clear cylanders... still nothing, im waiting on snappy to bring me my 5.5mm tip borescope so i can inspect for piston/cyl/valve dammage.

anyone out there with a 6.7 have an issue like this.
intake manifold go BOOOM!!-2-9f93360e-2080961-800.jpg
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Old 12-11-2011, 06:31 AM
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Wow. I've never heard of anything like that without using some sort of starting aid.
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Old 12-11-2011, 06:52 AM
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that was my first thought, so i was sniffin around like a blood hound but i couldnt find or smell any evidence of starting fluid or anything, there was a moderate oil residue in the cac tube from the intercooler. this truck sees a lot of idle time and has 28000 on the ticker, i replaced the egr cooler a while back for a p0401 code and found the coolers cacked full of "carbon"
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Old 12-11-2011, 10:21 AM
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Wow! That was a hell of a pop
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Old 12-11-2011, 10:47 AM
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Hmmmmmm and the oil pan is plastic too.
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Old 12-12-2011, 10:24 AM
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Quote:
Originally Posted by Term3 View Post
Hmmmmmm and the oil pan is plastic too.
Are you implying that this wouldn't have happened if the intake manifold were made of cast aluminum? Regardless of what materials the parts are made of, the truck obviously had something go seriously wrong. I haven't heard of anyone damaging their oil pan just because it's plastic. Actually, plastic has more memory than aluminum or steel. It can return to it's original shape after an impact.
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Old 12-12-2011, 12:02 PM
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+1 for plastic being good for manifolds and pans.
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Old 12-12-2011, 01:42 PM
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well at this point, the oil pan is intact and did not suffer from the engine falier the destroyed the intake. all i saw with the borescope was heavy scoring on the #2 cyl wall, talking with ford hotline at the moment to see what they want me to do...
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Old 12-12-2011, 03:32 PM
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Originally Posted by mor4wd View Post
Are you implying that this wouldn't have happened if the intake manifold were made of cast aluminum? Regardless of what materials the parts are made of, the truck obviously had something go seriously wrong. I haven't heard of anyone damaging their oil pan just because it's plastic. Actually, plastic has more memory than aluminum or steel. It can return to it's original shape after an impact.
I must be old fashioned as plastic engine parts just seem odd, especially in -35 C weather. I'm sure all these plastic parts have been fully tested though.
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Old 12-12-2011, 04:18 PM
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correct me if im wrong but i would think that metal would be effected by -35 C more than a composit plastic. i know that metal expands/contracts a lot with temp change.
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