2002 7.3L Broke? Please Help.
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2002 7.3L Broke? Please Help.
I was driving from a light under light acceleration on a up grade when the turbos seemed to just kick in, a loud pop occured and then a high pitched metal ricochett sound occured. Power decreased suddenly and a small amt of black smoke appeared. I pulled over and the truck was ideling fine. I got out and no leaks or odd engine sounds occured. When the truck was revved it seemed fine but without the turbo effect. I have pulled the turbo and see no obvious mechanical problem as the wheels turn with ease. There seems to be some oil on the exhaust side. Fuel mielage decreased over past 3-4 weeks. Mielage is 65,000. What could have happened?
Lead Driver
Joined: Jun 2007
Posts: 7,760
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From: Hampton, Maryland.
You blew a turbo boot it sounds like to me. The ricochet sound could have been the clamp flying and hitting something. Look at the turbo wheel and see if it looks like the blades have made any contact with the housing. I don't think that that is it, but just check it while it's very accessible.
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boots are intact. intake side of turbo wheel may touch the housing slightly but no gross dammage. Turbo seemed to make grinding noise. Could the pedestal be a part if the exhasut side did not open. there is oil around the pedestal but just a small amt.
Post Fiend
Joined: Mar 2007
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From: Texas
The compressor wheel in the turbo can spin up to 130,000 RPM's so slightly touching the housing is a bad thing. Is there any signs of damage to the wheel or side to side or in and out play in it?
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Of the next Riffraff East
Joined: Oct 2004
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From: Concord NC
That is not good, give more detail as to what you are seeing.
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no pistoning motion. Up and down is just enough to get the blades to lightly touch the housing. No metal loss on the housing but a few shiny polish marks are present. If the intercooler was leaking would that not make noise?
Lead Driver
Joined: Nov 2007
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Do you have a boost gauge? If so are you reading anything? Any chance of a SES light when it happened? Oil in the exhaust side is half way normal and nothing to worry about... Sounds to me like your turbo ate something... The question is what? how much? and where did it go??? 
A list of your mods and what you have done to the truck would be helpful also.
Good luck and welcome to FTE!!!
A list of your mods and what you have done to the truck would be helpful also.
Good luck and welcome to FTE!!!
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New User
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No boost gauge, no check engine light. Mods are superchip tuner, afe stage II intake, 4" turbo back exhaust, 33 x 15.5 tires. Engine starts, idels and reves fine but turbo did not make any noise after the metal eating sound. No heat rings on the metal anywhere, no shiny metal as if metal scratched something.
Lead Driver
Joined: Nov 2007
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Hmmmmmmmm... Ummmmmmmm.... pressure test the system? I believe someone around here has a DIY way to do it perhaps someone els will join in with some info on that.
Barry shouldn't it still be making boost though???
Barry shouldn't it still be making boost though???
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New turbo ordered with methanol injection kit, but I like to know what is wrong and not just throw parts at it. Usually if the problem is mechanical there is something that makes since, metal shavings, locked up parts etc. The turbo seems simple but i am not seeing a problem that would shut it down fully so I am wondering if ther problem could from elsewhere but nothing else seems to make sense.
Of the next Riffraff East
Joined: Oct 2004
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From: Concord NC
Did you miss this? The blades cannot hit the housing. Period.