OCRV Center rebuilds worn and failed RV generators in our Yorba Linda shop, from top-end head and valve work to full teardown with new rings, bearings, and seals on Onan and Cummins sets. We diagnose whether a unit is worth overhauling or better replaced before any teardown begins.
There is a point where a generator stops needing maintenance and starts needing a rebuild. Low compression, oil burning, a knocking bottom end, or a scored cylinder are not service items, they are overhaul work. We tear the unit down on the bench, measure the actual wear, and rebuild the engine and generator end to spec instead of throwing parts at a symptom. All work is in-shop only at our Yorba Linda facility.
When an overhaul is the right call
We start every overhaul candidate with a compression and leak-down test so the decision rests on numbers, not a guess. A set that smokes, fails to hold compression, or has a spun bearing is a teardown job. A set that surges or will not start from a fuel or control fault is a repair, not an overhaul, and we will tell you which one you actually have before quoting a rebuild.
- Compression and leak-down testing before teardown
- Oil-burning, low-power, and hard-knock diagnosis
- Scored cylinder and worn ring identification
- Honest rebuild-versus-replace recommendation
What a full overhaul includes
A complete overhaul means the engine comes apart on the bench. We hone or bore the cylinder, fit new rings, bearings, and seals, service or replace the valves and seats in the head, and reassemble to factory torque and clearance. On the generator end we inspect the rotor, stator, slip rings, and brushes, and address bearing and winding faults. The set is then run on a load bank to confirm it holds voltage and frequency before it leaves.
- Cylinder hone or bore with new rings and bearings
- New gaskets, seals, and valve service in the head
- Rotor, stator, brush, and slip ring inspection
- Carburetor or injector rebuild as part of the package
- Load-bank test to verify rated output after assembly
Onan, Cummins, and what we will not pretend to fix
We overhaul the gas, diesel, and LP sets common to motorhomes, fifth wheels, vans, and commercial and municipal fleet vehicles, with a focus on Onan and Cummins. Some failures, a cracked block or a burned stator on an obsolete unit, cost more to rebuild than to replace. When that is the case we say so and quote a replacement install instead, because a rebuild that costs more than a new set is not a repair we will sell you.
Frequently asked questions
How do you know if my generator needs an overhaul or just a repair?+
We run a compression and leak-down test first. Low compression, oil burning, or a knocking bottom end points to an overhaul, while surging or a no-start from fuel or controls is a repair. We tell you which one you have before quoting any teardown.
Is it worth overhauling an old RV generator?+
Sometimes yes, sometimes no. A sound block with worn rings and bearings is a good rebuild candidate. A cracked block or a burned-out stator on an obsolete unit usually costs more to rebuild than to replace, and we will recommend a replacement install when that is the honest math.
Do you test the generator after rebuilding it?+
Yes. Every overhauled set is run on a load bank in the shop to confirm it holds rated voltage and frequency and carries a real electrical load before we hand it back.
Rigs we service
Related services
What's Included
- ✓A written estimate before any work begins
- ✓Direct insurance billing and supplement handling
- ✓Teardown to find hidden damage, not just surface cracks
- ✓Repairs documented to factory structural specs
- ✓Color matched paint in a downdraft booth
- ✓A multi point quality inspection before delivery
Our Process
- 1
Assessment
Call or request a quote. We review the damage, put a written estimate in your hands, and explain your insurance options.
- 2
Insurance coordination
We bill your carrier direct and handle the photos, paperwork, and supplements so the repair is approved completely.
- 3
Expert repair
Your vehicle moves through our shop across body, paint, structure, and systems, handled by techs who work on rigs like yours daily.
- 4
Quality control
Every vehicle passes a multi point inspection covering structure, paint, seals, and systems before it is cleared.
- 5
Delivery and handover
We return your vehicle clean and documented and walk you through everything that was repaired before you drive away.
OCRV Center vs a typical body shop
| OCRV Center | Typical body shop | |
|---|---|---|
| Vehicle types | ✓RVs, vans, trailers, trucks, buses, EV/Rivian | Cars and light trucks only |
| Work under one roof | ✓Collision, paint, fiberglass, frame, roof, slides, systems | Outsources specialty work |
| Insurance handling | ✓Billed direct, supplements written for hidden damage | You chase the adjuster |
| Facility | ✓35,000 sq ft with lift capacity and a downdraft booth | Cannot fit a 40 ft coach |
| Estimate | ✓Written estimate before work starts | Verbal or vague |
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