Place of Origin:
China
Brand Name:
Isuzu
Model Number:
4BG1
4bg1 4bg1t 4bg1-t 4bg1-trw remanufactured rebuilt regenerated engine assembly 4.329l 4329cc 264ci 105mm bore 125mm stroke four cylinder ohv 8 valves turbocharged 82kw 111ps 123hp marine core exchange long block complete engine for isuzu for hitachi ex100 ex120 ex120-5 ex130-5 ex200 zax120-6 excavator for sumitomo sh120 sh120-5 for kobelco sk120 sk135 8-94418919-0 8-94418920-0 1-12111-781-0 1-12111-377-4 1-12111-528-0 head gasket piston 6bg1 4bd1 4be1
Remanufactured four cylinder assembly for the 4BG1, published at 105 mm by 125 mm and 4,329 cc with eight overhead valves and turbocharging on the T build. Ratings vary by application: about 82 kW in the maker's list, 123 hp in a marine version. Remanufactured units are quoted between 2,400 and 2,500 per set.
| Item | Specification |
|---|---|
| Product Name | Remanufactured Complete Engine Assembly |
| Series | BG series, four cylinder range |
| Build Codes | 4BG1 and 4BG1T in machine use, 4BG1-TRW in marine use |
| Configuration | Inline four, four stroke, water cooled diesel |
| Displacement | 4,329 cc, 4.3 L, 264 cu in |
| Bore and Stroke | 105 mm by 125 mm |
| Valvetrain | Overhead valve layout, eight valves |
| Aspiration | Naturally aspirated on the plain build, turbocharged on the T build |
| Output | About 82 kW in the maker's list, 123 hp in the marine turbo version; higher trader figures belong to other applications |
| Applications | Quoted for Hitachi in the EX100, EX120, EX120-5, EX130-5, EX200 and ZAX120-6, for Sumitomo in the SH120 and SH120-5, and for Kobelco in the SK120 and SK135 |
| Renewal Scope | Agreed per unit: liners, pistons and rings, bearings, gasket set, head work, crank decision and a run test |
| Core | Exchange core required, with condition and value fixed before acceptance |
| Category | Replaceable Part Numbers & Compatible Models |
|---|---|
| Head Gasket | 8-94418919-0 and 8-94418920-0, listed across the 4BE1, 4BG1 and 4BG2 builds |
| Piston | 1-12111-781-0, 1-12111-377-4 and 1-12111-528-0, listed for this engine |
| Crankshaft | A crankshaft casting is catalogued for the 4BG1 and 4BG1T without a separate number in the catalogue excerpt |
| Marine Variant | 4BG1-TRW, turbocharged and rated 123 hp, a different build from the machine unit |
| Caution - Three Words, Three Goods | Remanufactured, renewed and used units sell side by side between 1500 and 5999, so condition must be fixed on paper |
| Caution - The Core Is Part Of The Deal | A remanufactured unit is priced against a returned core, so a buyer without one pays for two engines unless that is agreed |
| Caution - Ratings Do Not Travel Between Applications | The maker's list shows about 82 kW, a marine version 123 hp, and trader headings more, so a rating cannot identify a build |
| Caution - The Six Cylinder Sibling | The 6BG1 and 6BG1T share headings across the same excavator models, so naming the machine does not name the engine |
| Caution - Shared Gasket Numbers Across The Family | The head gasket numbers above also serve the 4BE1 and 4BG2, so a correct gasket does not prove the right block |
| Caution - Wide And Uneven Price Spread | Remanufactured sets sit near 2400 to 2500, renewed 1900 to 2000, long block cores 1899, used 1500 to 3990, and new or rebuilt entries to 5999; headings at 500 to 1134 are not whole engines |
| Related Components | Head gasket 8-94418919-0; piston 1-12111-781-0; liner kit; ring set; bearings; crankshaft; cylinder head; injection pump; turbocharger; water pump; oil pump; full gasket kit |
It means the unit is built back up on a returned core rather than being new or a used take-out. Which parts are replaced and which are reconditioned varies between suppliers, so the scope belongs on the quotation item by item, with the run test result.
A core is normally part of the deal, priced against the returned unit. Where none is available the quotation must say so, because a price without a core is a different offer.
By paperwork rather than the wording of a listing. The same market describes goods from 1500 to 5999 with overlapping words, so the invoice, renewal list and test sheet are what separate them.
Listed for Hitachi in the EX100, EX120 and EX200, for Sumitomo in the SH120 series and for Kobelco in the SK120 and SK135.
Head gasket 8-94418919-0 and 8-94418920-0 are listed across the 4BE1 and 4BG family.
The renewal scope, the core condition and the machine serial, all in writing.
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