Head Gasket and Front Cover Reseal
Keep your engine sealed tight and running strong. Our expert head gasket and front cover reseal service prevents costly leaks, overheating, and downtime so your truck stays reliable mile after mile.
Radiator Replacement for OTR Trucks
When your rig’s cooling system fails on the road, downtime isn’t an option. Our fast, professional radiator replacement for OTR trucks keeps your engine running cool and your deliveries on schedule.
Engine Swap – 1998 Chevy 3500 (350 Gas Engine)
It’s not just diesels we’ve got you covered on gas engines too. From full engine swaps in a ’98 Chevy 3500 (350 gas) to heavy-duty diesel rebuilds, Tri-State Diesel Repair tackles it all with precision and trust.
Tri-State Diesel Repair is a veteran-owned truck and trailer repair company based in Belmont, NH, offering expert mobile diesel repair, fleet maintenance, and roadside assistance across Lakes Region NH Trusted. Fast.