How many miles before rebuild? - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 7 (permalink) Old 01-04-2020, 06:53 AM Thread Starter
 
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How many miles before rebuild?

I am brand new here, so I’m not good at the using the forum yet. I have been reading from this site for about 7 years and you guys have helped me plenty. I’m on my second LB7, that’s all I’ve driven since 05. I currently have 276000 on mine and it’s about time for the 2nd set of injectors. My question is, should I think about rebuild at that mileage before spending 3 grand on injectors?
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post #2 of 7 (permalink) Old 01-04-2020, 08:49 AM
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if its running good,not to much blow by,,I'd keep running it,,my old truck is approaching 400k and is still an animal.needs another set of injectors but thats it.

2002 GMC 2500HD, ECSB, 4WD, LB7
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post #3 of 7 (permalink) Old 01-04-2020, 03:24 PM Thread Starter
 
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Thanks, it does have a little blowby. enough to get the tube and front corner of the oil pan wet between oil changes. But it never drips on the ground. How much does yours have at 400?
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post #4 of 7 (permalink) Old 01-04-2020, 03:47 PM
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You could check the compression and go from there but I wouldn’t just jump into rebuilding it just cause it has 276k on it.

Gideon
01 LB7
2007 Yukon Denali
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post #5 of 7 (permalink) Old 01-04-2020, 08:25 PM
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That tube is the crankcase breather so if the pan is wet it's doing its job. Other than head gaskets/studs my engine still running on what the factory built.....except for a few sets of injectors of course!

Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
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post #6 of 7 (permalink) Old 01-04-2020, 08:30 PM
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Quote:
it’s about time for the 2nd set of injectors.
Look into the newly available SAC00 injectors instead.

https://lincolndieselspecialties.com...injectors.html

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
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Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
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post #7 of 7 (permalink) Old 01-05-2020, 10:44 AM
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408k on my LB7 and it runs just fine. No reason to think it'll need a rebuild short of 1,000,000 miles.

2002 Chevy 2500HD Crew - Original owner - 408,000 miles so far. All stock with the exception of a lift pump.
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