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Cummins L10 problems....
Have a 93 L10 - 300 (non celect) upon startup it smokes and runs rough, once warm it smooths out and no smoke exept on load. Strangly when i use the block heater it does not smoke for the first 5 mins of start up but then starts to run rough again and smoke until warm....???
could the thermostat cause this? Hoping its not major like a leaky head gasket, or injectors, though the engine consumes no oil or coolant, and there is no evidence of water in the oil....
any help would be great
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