Complete Rebuild Supply — Every gasket, ring, and seal mapped to Kohler CH and CV engine serial variants before dispatch.
Technical Specifications
| Parameter |
Value |
| Product Type |
Overhaul Kit |
| Cross-Reference |
24-108-22-S (reference only), 24 108 22 (reference only), 2410822 (reference only) |
| Machine Fitment |
CH18, CH20, CH22, CV18, CV20, CV22, CH620, CH630, CH640, CH641, CV620, CV630, CV640 |
| Kit Contents |
Piston rings, gaskets, seals |
| Condition |
New Aftermarket |
| Manufacturing Standard |
ISO-certified facility |
| Oversize Options |
available in STD, 0.25 and 0.50 oversize |
| Warranty |
3-12 months against manufacturing defects |
| MOQ |
1 piece |
Application Suitability
| Engine System |
Related Components |
| Cylinder block and bore sealing |
Cylinder liners, hone stones, block heaters |
| Piston ring and combustion seal |
Piston assemblies, connecting rod bearings |
| Valve train and head sealing |
Valve guides, valve stem seals, head bolt sets |
| Crankcase and crankshaft sealing |
Main bearings, thrust washers, oil pump assemblies |
| Engine overhaul planning |
Torque specifications, clearance gauges, assembly lubricant |
Why an Engine Rebuild Kit Must Match the Exact Engine Build History
A Kohler engine overhaul kit only works when every component inside it matches the current dimensional state of your block and crankshaft.
Rebuild shops across Southeast Asia routinely encounter Kohler CH and CV power units that have already been through one or more previous overhauls. Each prior machining pass may have enlarged the bore or ground the crankshaft journal, meaning the next set of rings and bearings must step up in oversize grade. When an engine rebuild kit arrives with standard-size piston rings for a block that was already bored to 0.50 oversize during a prior rebuild, the compression loss is immediate and the teardown repeats within days [NEED_CITE: engine cylinder bore measurement standards for small-displacement multi-cylinder engines]. Beyond the dimensional mismatch, gasket profiles can shift between early and late production runs of the same Kohler model, leaving a kit that is technically the right part number yet missing a seal specific to the serial range on your engine tag.
The System Behind Every Piston Ring Failure
Piston rings rarely wear out in isolation. The underlying cause is almost always a supporting system that has drifted out of specification — insufficient oil splash from a fatigued pump, restricted coolant flow allowing localized hot spots on the cylinder wall, or a compromised air filter admitting abrasive dust that scores the bore surface. A Kohler engine overhaul kit replaces the rings and seals, but if the root cause remains unaddressed, the new rings will follow the same wear path within a short operating window. Rebuild shops that couple kit installation with a parallel inspection of the lubrication circuit, cooling passages, and intake filtration consistently see longer intervals before the next teardown [NEED_CITE: diesel and gasoline small engine lubrication system diagnostics].
Sizing the Kit to the Block's Actual Machining State
Before any engine rebuild kit is opened, the bore must be measured at multiple depths and the crankshaft journals checked for taper and out-of-round. Kohler CH18 through CH640 engines share common architecture, yet the production history of each serial range introduces subtle differences in piston crown profile and ring groove width. A CV620 that left the factory in an earlier production window may carry different ring land dimensions compared to a CV620 produced several years later, even though both carry the same base model designation. Confirming the exact serial number, reading the micrometer results, and matching the kit's oversize grade to those measurements prevents the most costly form of rebuild error — discovering the mismatch only after the head is torqued down and the engine refuses to build compression.
Reading the Spec Sheet Beyond the Part Name
The piston rings included in this Kohler engine overhaul kit are supplied in standard, 0.25 mm, and 0.50 mm oversize options, covering the most common machining increments encountered after cylinder honing. The gasket set addresses the cylinder head, intake and exhaust manifolds, valve cover, and crankcase split line, while the seal assortment covers the crankshaft front and rear oil seals plus the valve stem seals. Together these components form the complete sealing boundary between combustion pressure, oil galleries, and the external environment. Selecting the correct oversize grade is not a matter of preference — it is dictated by the bore diameter the machinesshop measures after removing the existing pistons and liners [NEED_CITE: piston ring end gap and bore clearance specifications for air-cooled engines].
What a Wrong Kit Costs Before the Engine Starts
An engine rebuild kit with mismatched ring sizes does not simply reduce performance — it forces a complete teardown. Head bolts are stretched and may need replacement, gaskets are destroyed upon removal, and labor hours double. In a remote site setting where the Kohler unit powers a generator or an irrigation pump, that second teardown extends the outage by days while replacement components are sourced. Even when the oversize grade is correct but a single seal profile is wrong for the serial variant, the resulting oil leak or compression bleed can mimic a much deeper mechanical fault, sending technicians on a diagnostic chase that wastes further operating time [NEED_CITE: field consequences of incorrect engine overhaul component selection].
Why Rebuild Shops Source This Kit Through XUNPO
Our Guangzhou warehouse stocks this Kohler engine overhaul kit with multiple oversize grades ready for immediate dispatch, so a shop can order the exact size after measuring the bore without waiting for a back-order cycle. Both our own production lines and qualified sourced supply carry identical QC and warranty terms, meaning one account covers every kit variant needed across different Kohler serial ranges. A single-piece minimum order allows emergency purchases for a lone downed machine, while bulk orders for fleet overhaul programs ship under consolidated documentation. Our technical team cross-references the engine serial number against internal build records to flag variant-specific gasket differences before the kit leaves the warehouse.
Documentation & Verification
- Commercial invoice listing each kit component with oversize grade specified
- Cross-reference sheet mapping 24-108-22-S (reference only) to Kohler serial ranges
- Dimensional inspection record for piston rings and gasket thickness
- Warranty certificate covering manufacturing defects for 3-12 months
- Packing photographs showing kit contents verified before sealing
- HS code and customs classification support for international shipment
Installation & Rebuild Sequence
- Verify piston ring end gap inside the actual bore before fitting to the piston
- Clean all block oil galleries and coolant passages to bare metal condition
- Confirm crankshaft journal size matches the bearing grade selected for this kit
- Torque head bolts in the specified sequence and increment pattern
- Prime the lubrication system and monitor oil pressure during the first run-in cycle
Requesting the Right Kit for Your Engine
Provide the full Kohler engine model and serial number from the nameplate along with any bore measurement results from your machinist. If the block has been machined previously, share the oversize grade stamped on the old piston crown or the micrometer reading so we can match the piston rings accordingly. Photos of the nameplate and the existing piston help us confirm the serial variant and catch any production-run gasket differences before the kit ships.
Frequently Asked Questions
Q: What specific items are included in this Kohler engine overhaul kit?
A: The kit contains piston rings in your selected oversize grade, a full gasket set covering the cylinder head, manifold, valve cover, and crankcase joints, plus crankshaft and valve stem seals. We provide a detailed contents checklist with every shipment so you can verify each piece against your rebuild scope before opening the packaging.
Q: How do I determine which oversize grade my engine needs?
A: After removing the pistons, your machinist measures the bore diameter at multiple depths. The difference between that measurement and the factory standard bore determines whether standard, 0.25 mm, or 0.50 mm oversize rings are required. Share those readings with us and we will match the kit accordingly.
Q: Do all Kohler CH and CV engines of the same model share identical internal parts?
A: Not always. Production date and serial number can affect piston crown profile, ring groove width, and gasket shape. We cross-reference your engine serial number against build records to identify any variant-specific differences before confirming kit compatibility.
Q: What else should be inspected when replacing piston rings?
A: Check the oil pump output, coolant flow passages, and air filtration system. Piston ring wear is frequently accelerated by a secondary fault such as oil starvation or abrasive ingestion. Addressing the root cause alongside ring replacement extends the interval before the next overhaul is needed.
