Duramax Diesels Forum Truck of the Week
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Old 10-03-2018, 12:03 AM
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Default Lbz coolant line size

Currently at work trying to order stuff. Does anyone know what size the coolant line is thats below the alternator on a lbz. Comes off the black tube that runs up from the water pump to the thermostat housing. Thanks.
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Old 10-03-2018, 12:06 AM
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Looks like from the factory the piece is only 2 inches and runs to a hard line. Ill be replacing that with braided hose.
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2007.5 lmm Ccsb: 628hp 1237tq- sold

New to me 06 lbz ccsb sas. 72mm/s483. 10mm cp3. 60 overs. Bunch of other goodies!
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Old 10-10-2018, 07:56 PM
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Not 100% sure if they're the same size, but the hose is 1/2" ID on an LMM. It's for the coolant return from the turbo. It slides over a flared barb on each end, and it just has spring clamps from the factory. So if you're going the braided hose route, I'd get some good hose clamps. That hose is a PITA to get to.
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Old 10-10-2018, 08:14 PM
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3/8 or 1/2" can't remember I can look tomorrow am and post up
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