6113 Series Diesel Engine Parts — Generator Applications
The 6113 series is a 6-cylinder diesel engine with a 113mm bore, offering increased displacement (~7.4L) and power output compared to the 105mm bore engines. These engines power generator sets typically in the 120-250 kW range, serving medium commercial standby, industrial prime power, and larger agricultural applications. The larger bore provides significant torque at generator speeds, making these engines well-suited for applications requiring stable frequency under varying loads.
Engine Specifications
| Parameter |
Specification |
| Configuration |
Inline 6-cylinder, 4-stroke, water-cooled, direct injection |
| Bore x Stroke |
113mm x 125-140mm (varies by variant) |
| Displacement |
~7.4-8.4L |
| Compression Ratio |
16:1 – 17:1 |
| Firing Order |
1-5-3-6-2-4 |
| Power Range (Generator) |
120-250 kW |
Key Maintenance Parts and Intervals
| Item |
Interval |
Specification |
| Engine Oil Capacity |
Check daily, change 250h |
~18-22L with filter; SAE 15W-40 API CK-4 |
| Oil Filter |
With oil change |
Spin-on type; verify bypass valve pressure setting |
| Fuel Filters (Primary + Secondary) |
Every 500 hours |
Water separator primary + fine secondary; change both |
| Valve Clearance Check |
Every 1000 hours |
Intake: 0.30mm / Exhaust: 0.35mm (cold) |
| Injector Service |
Test every 2000h, overhaul 4000h |
Opening pressure: 21-23 MPa typical |
| Coolant |
Test annually, change every 2 years |
Use SCA pre-charged or add SCA as needed; test with test strips |
Frequently Asked Questions
1. What size radiator is needed for a 6113 series generator engine?
The radiator should be sized to reject approximately 0.8-1.0 kW of heat per kW of engine mechanical output, plus a margin for high ambient. For a 150 kW engine, this means a radiator capable of rejecting approximately 120-150 kW of heat at the maximum expected ambient temperature (e.g., 45°C). A radiator that is marginally sized will work in normal conditions but cause overheating during heat waves — size for the worst-case scenario, not the average.
2. How do I troubleshoot low oil pressure on a 6113 engine?
Systematic approach: (1) verify with a mechanical gauge — electric senders can fail and read low, (2) check oil level and viscosity — diluted oil or wrong viscosity causes low pressure, (3) inspect oil pressure relief valve — stuck open, broken spring, or debris under seat, (4) cut open oil filter and inspect for metal particles, (5) if no obvious external cause, the problem is internal — worn main/rod bearings, worn oil pump, or internal oil leak (cam bearing, piston cooling jet). Low oil pressure at hot idle is tolerable if it returns to normal at rated speed; low pressure at rated speed requires immediate shutdown and investigation.
3. What is the typical fuel consumption for a 6113 series generator?
At full load, approximately 205-220 g/kWh. For a 150 kW generator: approximately 31-33 L/hr (8.2-8.7 gal/hr) at 100% load, 24-26 L/hr at 75% load, 17-19 L/hr at 50% load. Fuel consumption is highest during the first 50-100 hours of break-in and gradually decreases as the engine beds in. A sudden increase in fuel consumption (without a corresponding load increase) indicates a problem — check air filter restriction, injector condition, and injection timing.
4. Can I parallel two 6113 generators for more power?
Yes, 6113 series generators can be paralleled with proper equipment. Requirements: (1) compatible generator controllers with paralleling capability (or external paralleling control), (2) electronic governors on both engines for precise speed/load sharing, (3) automatic voltage regulators with reactive load sharing (droop CT or cross-current compensation), (4) synchronizing panel with circuit breakers, and (5) proper grounding and protection coordination. Paralleling provides redundancy — one generator can be serviced while the other carries critical loads.
5. How long can I run a 6113 generator continuously?
The 6113 series is rated for continuous duty within its prime power rating (typically 80-85% of standby rating). At prime power rating, the engine can run 24/7 with scheduled maintenance stops (oil and filter changes every 250 hours = every 10.4 days). The limiting factor for truly non-stop operation is not the engine itself but the maintenance schedule — you must stop for oil changes. With a duplex oil filtration system and a hot oil change setup, continuous operation can extend to 500+ hours between brief service stops.
6. What are the exhaust emission considerations for 6113 engines?
6113 series engines are typically Tier 2 or Tier 3 emissions compliant depending on manufacture date and market. For regulated markets requiring Tier 4 Final / Stage V compliance, these engines generally cannot be sold new — they must be replaced with electronically-controlled common rail engines with DPF/SCR aftertreatment. Existing installed 6113 generators can continue to operate (grandfathered) in most jurisdictions. When replacing a 6113 engine, the entire generator set may need replacement due to the different physical size and control requirements of Tier 4 engines.
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Frequently Asked Questions
What is the 6113 Series diesel engine?
The 6113 Series is a 6-cylinder, 113mm bore diesel engine — a medium-to-large displacement engine platform (6.5-7.5 liters depending on the stroke, typically 125-135mm). The ‘6113’ designation: 6 cylinders x 113mm bore. This engine is a significant step up from the 6105 in power density and torque. Power output: 100-160 HP naturally aspirated and 160-260 HP turbocharged and intercooled at 1,500-2,200 RPM. Generator applications: 60-150kW diesel generator sets — the sweet spot for many commercial, industrial, and prime-power installations. The 6113 platform is produced by multiple manufacturers including Shangchai (SC7H/SC8D derivatives), Yuchai, and various licensees. Compared to the 6105, the 6113’s larger bore allows for larger valves and better breathing, enabling higher specific output. The engine features a deep-skirt cast iron block, 7-main-bearing crankshaft for smooth operation, and typically a gear-driven camshaft and injection pump.
What replacement parts are available for the 6113 Series?
HUAQUAN stocks the complete 6113 parts range: (1) Engine block: wet-type cylinder liners (with O-ring seal kit), pistons with ring sets and piston pins (standard and oversize), connecting rods with bearings, main bearing sets (upper and lower shells, 7-main-bearing design), crankshaft (standard and undersize journals), thrust washers, camshaft with bearing bushings; (2) Cylinder head: complete head assembly, intake and exhaust valves (larger diameter than 6105 for improved breathing), valve seats and guides, valve springs, rocker shaft and arms, pushrods, head gasket (notch-coded for thickness selection) and complete overhaul gasket set; (3) Fuel system: in-line injection pump (6-plunger, high-pressure), injectors (direct-injection, multi-hole nozzle), fuel filter assemblies (primary/secondary), lift pump, hand primer; (4) Turbocharging (61Z13 variants): turbocharger with gasket kit, intercooler (air-to-air) where equipped; (5) Lubrication: high-capacity oil pump, spin-on oil filter, water-to-oil oil cooler; (6) Cooling: water pump, thermostat (82-88 degrees C), fan, radiator; (7) Electrical: 24V starter motor (5.5-7.5kW), 28V alternator; (8) Overhaul kits.
What are the key differences between the 6113 and 6105 engines?
Differences: (1) Bore: 113mm vs. 105mm — 7.6% larger, resulting in approximately 15-20% more displacement for the same stroke; (2) Power: the 6113 produces 20-40% more power naturally aspirated and up to 50% more when turbocharged; (3) Crankshaft: the 6113 uses 7 main bearings vs. typically 7 on the 6105 as well, but larger diameter journals on the 6113 for the higher cylinder pressures; (4) Valve sizes: larger intake and exhaust valves on the 6113 to flow the increased air mass; (5) Block: the 6113 has a taller deck height and wider cylinder spacing to accommodate the larger bore; (6) Components: pistons, liners, head gaskets, cylinder heads, valves, injection pumps, and turbochargers are completely different — NO parts interchange between the two series; (7) Weight: a complete 6113 is approximately 10-20% heavier than a 6105 (typically 550-650 kg vs. 480-550 kg dry weight). The 6113 is the logical upgrade when a 6105-powered generator set needs more kW rating.
How do I properly install new cylinder liners in a 6113 engine?
Liner installation procedure: (1) Clean the block’s counterbore (the recess the liner flange sits in) meticulously — use a wire brush and solvent, then wipe clean. Any debris, old gasket material, or corrosion in the counterbore will cause uneven liner seating; (2) Inspect the counterbore for fretting (erosion pitting) or cracks — the counterbore must be in good condition to seal the head gasket; (3) Install new O-ring seals on the liner — lubricate with clean engine oil or rubber lubricant. Do not use grease, RTV silicone, or any sealant on the O-rings — they seal by their rubber compliance, not by chemical bonding; (4) Insert the liner into the block by hand, rotating slightly — it should slide in smoothly. If excessive force is needed, the O-rings may be pinched — remove and re-lubricate; (5) Use a liner press tool or a flat plate with a hydraulic press to fully seat the liner — never hammer a liner into place; (6) After seating, measure the liner protrusion (the amount the liner flange extends above the block deck) at 4 points around the circumference with a dial indicator. The 6113 typically requires 0.05-0.15mm protrusion. Variations between cylinders must be within 0.03mm; (7) If protrusion is out of specification: the liner is not fully seated (clean the counterbore again), the counterbore is machined incorrectly (machine shop work required), or the wrong liner is installed.
What is the correct valve clearance for the 6113 engine?
Valve clearance (cold engine at TDC compression): Intake 0.30mm, Exhaust 0.35mm — typical for the 6113, always verify per the specific manufacturer’s service manual. The slightly larger clearance compared to smaller engines accounts for the larger valve stem length (longer stem = more thermal expansion). Procedure: (1) Remove the valve cover(s) — the 6113 may have a single long cover or individual covers per cylinder; (2) Rotate the crankshaft to TDC compression #1 — confirm the timing mark on the flywheel or front damper; (3) Adjust cylinder #1 — the feeler gauge should slide between the rocker arm and the valve stem tip with moderate drag; (4) Loosen the lock nut, turn the adjusting screw, and tighten while holding the screw. Re-check after tightening; (5) Rotate 120 degrees (firing order 1-5-3-6-2-4) — each 120-degree increment brings the next cylinder in the firing order to TDC; (6) After adjusting all 6 cylinders, rotate through two full revolutions and re-check two or three cylinders to confirm. Adjustment interval: every 500 operating hours.
Why does my 6113 engine consume excessive oil?
Oil consumption diagnosis for the 6113: (1) Worn piston rings/liners — the most common cause on higher-hour engines. Symptoms: blue smoke from the breather tube (blow-by) and from the exhaust, especially under load and during deceleration; (2) Worn valve guides and/or valve stem seals — oil is drawn down the intake valve guide into the cylinder during the intake stroke (intake manifold vacuum). Symptoms: blue smoke on start-up (oil accumulated in the cylinder overnight) that clears after warm-up, and blue smoke on deceleration; (3) Turbocharger seal leakage — oil leaks past the compressor or turbine shaft seals. Check for oil pooling in the intake piping (compressor side) and oil in the exhaust piping (turbine side); (4) External leaks — check the valve cover gasket, oil pan gasket, front and rear crankshaft seals, oil cooler gasket, and turbocharger oil feed/drain lines; (5) Overfilled oil — the crankshaft counterweights aerate the oil, increasing consumption through the breather. Check the dipstick with the engine on level ground; (6) Wrong oil viscosity — oil that is too thin (e.g., SAE 10W instead of SAE 15W-40) passes through the ring pack more readily. Confirm oil consumption: typical acceptable consumption is 0.1-0.3% of fuel consumption (e.g., 1-3 liters of oil per 1,000 liters of diesel fuel burned). Exceeding this rate warrants investigation.
