The LB7 Duramax is a 32-valve V8 diesel engine produced from 2001-2004.

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Repairing the injectors - clean or replace

Motor has 250,000 + miles and is emitting smoke at idle. Is there a way to clean the injectors or do they need to be replaced?

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mayer, I've never had much luck with cleaning injectors. I would suggest to either rebuild or replace. Rebuild kits are available at places like this. They also have a decent video on here.

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Thanks, I'll forward this to my son.

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mayer will be eternally grateful.
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