FuelPartsDB · WORKSHOP TECHNICAL SERVICE

DOC REF: SOP-CR-INJ-01

WORKSHOP INSTALLATION JOB SHEET & SOP

BOSCH 12636111BOSCH 12636111 High Pressure Direct Fuel Injector GM Cadillac CTS Camaro Traverse Acadia Enclave 3.6L V6 LFX 0261500029 · Euro 255

Technician / Installer:

Date / Odometer:

Vehicle Reg / VIN:

Quality Sign-off:

CRITICAL INSTALLATION SPECIFICATIONS & TORQUES

Torques (Hold-down):10 N·m (89 in-lb) fuel rail mounting bolts

Torques (Tightening):30 N·m (22 lb-ft) high-pressure crossover tube union nut

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

BOSCH

12636111

View Specs

SolenoidGM SIDI Spark Ignition Direct Injection (150-bar System)Euro 255

BOSCH 12636111 High Pressure Direct Fuel Injector GM Cadillac CTS Camaro Traverse Acadia Enclave 3.6L V6 LFX 0261500029

Reference data for Bosch 12636111 common rail injector · OEM 261500029, 12668649, 12634126, 217-3444, FJ1000, 0261500029 · 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 REFERENCE261500029, 12668649, 12634126, 217-3444, FJ1000, 0261500029

CONTROL VALVEHigh-Response Multi-Hole Electromagnetic High-Pressure Nozzle

NOZZLE-

RAIL PRESSURE150 bar

EMISSIONTier 2 Bin 5 / Euro 5 / LEV II

WARRANTY12 Months

Compatible Injectors

OEM Ref

Vehicle & Engine Fitment

Vehicle	Engine	Years
Chevrolet Camaro / Impala / Traverse	GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)	2012-2020
Cadillac CTS / ATS / SRX	GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)	2012-2016
GMC Acadia	GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY)	2012-2016

Technical Specifications

Specification	Value
System Type	GM Spark Ignition Direct Injection (SIDI) 150-bar High-Pressure System
Operating PressureCore Spec
Spray Configuration	Laser-Drilled 6-Hole Multi-Point Symmetrical Dispersion
Injector Hold-Down Bolt Torque	10 N·m (89 in-lb) fuel rail mounting bolts📐 Torque & Angle Wizard →
Fuel Line Nut Torque	30 N·m (22 lb-ft) high-pressure crossover tube union nut
Combustion Seal	High-Grade PTFE Virgin Teflon Combustion Ring
Upper Rail Sealing	Fluorocarbon (FKM) High-Temp Viton O-Ring
Manufacturer	Bosch (Tier-1 OEM for General Motors)
Bosch Production Number	0261500029

Installation Tips

Tips & Warnings:

Never reuse old Teflon combustion seals: The PTFE ring cold-flows during operation; reusing old seals causes combustion blow-by and burns cylinder head bores.
Inspect spark plugs for fuel washing: Leaking direct injectors soak spark plugs, creating persistent misfires even after new injectors are installed.
Always replace high-pressure fuel crossover pipe: GM high-pressure fuel lines use crush-type sealing interfaces designed strictly for single-use tightening.
Verify low-pressure feed delivery: Check that the tank fuel pump maintains 4.5 to 5.5 bar (65 to 80 psi) under load before troubleshooting injectors.

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.

Workshop Diagnostic Protocol

Common Rail Injector Back-Leak Testing Guide

Common rail injector backleak test protocol. Graduated cylinder setup, warm idle & cranking limits in mL/min, control valve wear & P0087 diagnosis.

Read Technical Protocol

ECU Calibration Protocol

Bosch IMA Injector Coding & Location Guide

Bosch common rail injector IMA coding guide. Locate laser-etched 6-9 digit codes on body, ECU OBD2 adaptation steps & test bench calibration facts.

Read Technical Protocol

COMMON RAIL DIESEL WORKSHOP SOP

Stuck Injector Removal & Carbon Cleaning SOP | FuelPartsDB

Comprehensive workshop SOP for stuck diesel injector removal, pneumatic vibro-puller extraction, carbon solvent softening, and seat reaming without damage.

Read Technical Protocol

ASSEMBLY & INSTALLATION PROTOCOL

Diesel Injector Torque Specs & TTY Angles Guide

Common rail diesel injector hold-down bolt torque specs, TTY angles & pipe unions. Covers Bosch, Detroit DD13, Cummins & VAG 2.0 TDI workshop data in Nm.

Read Technical Protocol

Workshop Reference Card

Torques - Tightening
Torques - Hold-down
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

Interactive Workshop Calculators

🔩 Torque & Angle Wizard 📐 Copper Washer Thickness 💻 IMA / QR Coding Validator 🧪 Back-Leak Balance Analyzer All 5 Workshop Tools →

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