FuelPartsDB · WORKSHOP TECHNICAL SERVICE

DOC REF: SOP-CR-INJ-01

WORKSHOP INSTALLATION JOB SHEET & SOP

HITACHI 12692510HITACHI 12692510 High Pressure Fuel Pump Cadillac XT5 CT6 ATS Chevrolet Camaro 3.6L V6 LGX LF3 HM10041 · Euro 6330

Technician / Installer:

Date / Odometer:

Vehicle Reg / VIN:

Quality Sign-off:

CRITICAL INSTALLATION SPECIFICATIONS & TORQUES

Torques (Hold-down):10 N·m

Torques (Tightening):10 N·m

Copper washer:Renew the sealing washer on every installation. 1.50 mm standard; step up to 1.70 mm after light seat reaming, 2.00 mm after heavy seat refinishing.

IMA / ECU coding:Not required for this assembly

MANDATORY INSTALLATION CHECKLIST

[ ]Bore cleaned to bare metal using nylon/brass reaming brush & vacuumed (zero debris / no steel wire)
[ ]New copper sealing washer fitted with correct thickness (do not reuse old washer)
[ ]High-temperature ceramic paste applied to injector body shaft (never coat the nozzle tip)
[ ]Hold-down clamp bolt tightened in stage torque/angle sequence as specified
[ ]Fuel rail high-pressure line union torqued without tension or cross-threading
[ ]IMA / QR calibration code entered into diagnostic tool (Lexia/KTS/VCDS) for cylinder balancing
[ ]Low-pressure air bleed performed, engine idling leak-off test verified leak-free

HITACHI

12692510

View Specs

SolenoidHitachi / GM 200-bar Direct Injection Fuel Delivery SystemEuro 6330

HITACHI 12692510 High Pressure Fuel Pump Cadillac XT5 CT6 ATS Chevrolet Camaro 3.6L V6 LGX LF3 HM10041

Reference data for Bosch 12692510 common rail injector · OEM 12661029, 12677329, 12683984, HM10041, HPP0026, GDP108 · Application GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)

Engine Platform:GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY) →

OE REFERENCE12661029, 12677329, 12683984, HM10041, HPP0026, GDP108

CONTROL VALVEIntegrated Pulse-Width Modulated Fuel Pressure Actuator

NOZZLE-

RAIL PRESSURE200 bar

EMISSIONEuro 6 / Tier 3 Bin 30 / ULEV

WARRANTY12 Months

Compatible Injectors

OEM Ref

Vehicle & Engine Fitment

Vehicle	Engine	Years
Cadillac XT5 / CT6	GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)	2016-2022
Chevrolet Camaro	GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)	2016-2022

Technical Specifications

Specification	Value
Operating PressureCore Spec
Pump Technology	Single Plunger Mechanical Camshaft-Driven HPFP
Flow Control	Pulse-Width Modulated Fuel Pressure Regulator Solenoid
Mounting Flange Torque	10 N·m
High Pressure Line Torque	30 N·m
Drive Type	Camshaft Multi-Lobe Drive via Hydraulic Roller Lifter
Fuel Type	Gasoline Direct Injection (SIDI / Spark Ignition Direct Injection)
OE Cross References	12692510, 12661029, 12677329, 12683984, HM10041, HPP0026
Failure Symptoms	Extended crank, fuel smell in crankcase, P0087 low rail pressure, power reduction mode
Diagnostic Test	GDS2 scan tool: Command rail pressure sweeps (40 to 200 bar) at idle and fast idle

Installation Tips

[
"De-energize in-tank fuel pump fuse and crank engine until fuel pressure drops to zero.",
"Remove sound insulator shroud over cylinder head rear; disconnect pressure regulator harness plug.",
"Carefully loosen high-pressure steel delivery tube flare nuts while backing up the pump fitting.",
"Evenly unbolt the two M6 mounting bolts half a turn each to release spring preload without tilting.",
"Inspect roller lifter and camshaft driving lobe for surface scoring, flaking, or rotational drag.",
"Lubricate new viton O-ring with fresh synthetic engine oil and insert pump squarely into bore.",
"Torque mounting bolts in small incremental passes to a final 10 N·m.",
"Torque high-pressure line flare nut to 30 N·m; reconnect electrical harness and verify zero fuel weeping."
]

Diagnostic Trouble Codes & Fault Protocols

Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:

P0087Critical

Fuel Rail / System Pressure Too Low

Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.

P0087 Guide →🧪 Backleak Calculator

P0201 - P0208High

Injector Circuit Malfunction / Open Circuit

Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.

P0201 Circuit Guide →

P0300 / P0301+High

Cylinder Misfire & Balancing Deviation

Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.

P0300 Misfire Protocol →💻 IMA Coding Tool 📐 Washer Thickness

P0088High

Fuel Rail / System Pressure Too High

Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.

P0088 Guide →📊 Rail Pressure Converter

Browse all 61 Diesel Diagnostic Trouble Codes in our Workshop Hub ->

WORKSHOP PROTOCOLS

Technical Diagnostic & Service Protocols

Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.

COMMON RAIL WORKSHOP DIAGNOSTICS

Common Rail High-Pressure Pump Diagnostics Guide

Diagnose common rail high-pressure pump failure: suction vacuum, CP4 roller glitter, plunger wear, air ingress & P0087 hard start. Workshop bench testing.

Read Technical Protocol

COMMON RAIL WORKSHOP DIAGNOSTICS

Fuel Metering Valve (IMV/SCV) Diagnostics Guide

Diagnostic guide for common rail fuel metering valves (IMV/SCV/FCA/MPROP). Normally open vs closed, coil resistance, PWM duty cycle & P0088 / P0089 test.

Read Technical Protocol

OBD-II DIAGNOSTIC PROTOCOL

P0087 Low Rail Pressure Diagnosis Guide

Step-by-step workshop diagnostic protocol for OBD-II DTC P0087 (Fuel Rail Pressure Too Low). 5-stage troubleshooting tree: backleak testing, SCV valve, PRV valve, and high-pressure pump.

Read Technical Protocol

COMMON RAIL WORKSHOP DIAGNOSTICS

Rail Pressure Relief Valve Diagnostics Guide

Common rail pressure relief valve (PRV) testing guide. Diagnose hot start stalls, P0087 rail pressure loss, return line leakage & single vs 2-stage valves.

Read Technical Protocol