Diesel Engine Repair & Overhaul Jerome, Idaho
Diesel engine repair and overhaul in Jerome, Idaho is what The Semi Shop was built for. Low power, blow-by, heavy oil use, a knock you can hear over the radio — bring it to our bays at 2745 Tucker Ct and we'll tell you straight whether it needs a repair or an in-frame overhaul.
What does an engine overhaul include?
An in-frame overhaul means we rebuild the engine without pulling it out of the truck. New liners, pistons, rings, bearings, and gaskets, with the head checked and machined as needed. The inline-six workhorses we see most — the Cummins ISX and X15, the Detroit DD15 — are built for this. Done right, an in-frame buys you hundreds of thousands of miles for far less than a new truck payment.
Not every tired engine needs the full job. Sometimes it's one cylinder, a head gasket, or a cam issue. We measure and inspect before we recommend anything, so you're paying for what the engine actually needs.
How long does an in-frame overhaul take?
Plan on several working days for a full in-frame, depending on parts availability and what we find inside. We give you a real timeline when we quote the job, and we call you if anything changes. Smaller repairs — a single cylinder, a gasket job — can be much quicker. We're open 7 AM to 10 PM every day, which keeps jobs moving.
What to expect on price
We inspect first, then hand you a written quote. The price we quote is the price you pay. If we open the engine and find something the inspection couldn't show, we stop and call you before doing anything extra. Nobody gets a surprise bill from this shop.
Overhauls for Magic Valley working trucks
Trucks around here work hard. Dairy hauls run year-round out of Jerome County, and harvest season stacks hay, grain, and produce loads on top. That duty cycle wears engines faster than easy highway miles. If your truck is losing power on the South Hills grades or drinking a gallon of oil between changes, get it looked at before a rod does the deciding for you. We're minutes off I-84 exit 168.
Driver questions
How do I know if my engine needs an overhaul?
Common signs: heavy blow-by from the breather tube, oil use climbing, low power, and fuel mileage falling off. We run tests — compression, blow-by measurement, oil analysis — before recommending an overhaul. Sometimes it's a cheaper fix.
Do you overhaul Cummins and Detroit engines?
Yes. Cummins ISX and X15 and Detroit DD15 in-frames are the bread and butter here. We also work on PACCAR and CAT power.
Is an overhaul worth it compared to a different truck?
Usually, yes — a fresh in-frame costs a fraction of a truck payment and resets the engine's life. We'll give you an honest quote so you can run the numbers yourself.
Shop bays in Jerome or mobile to any I-84 exit, Bliss to Declo · 7 AM–10 PM every day · The price we quote is the price you pay.