NHTSA ID Number: 10214309
Manufacturer Communication Number: DSM.0052
TSB/Document Date: 2022-06-21
Summary
Service manual
for Hexagon Agility® 488LPI propane autogas (LPG) engine mechanical and fuel components.
Lower Intake Manifold (12) and start
thirteen (13) Upper Intake Retaining
Bolts (11). Figures 2 and 3
4. Tighten Upper Intake Manifold
Retaining Bolts and Nuts. Refer to
Engine Mechanical Torque and
Clearance Specifications.
Follow tightening sequence in
Figure 3.
5. Install Purge Solenoid (8). Figure 4
6. Connect Purge Solenoid Hose and
Purge Solenoid Electrical Connector.
7. Install MAP/TIAP Sensor (5).
8. Connect MAP/TIAP Sensor Connector.
9. Connect Make Up Air Hose (6).
10. Install Throttle Body (10).
11. Connect Throttle Body Electrical
Connector at position (9).
12. Install TSM Mounting Bracket and TSM
(4).
13. Connect TSM (4) Connector.
14. Install the three bolts that secure cab
heater shut off valve to the upper intake.
15. Install ECM (3) and ECM Retaining
Bolts.
16. Connect ECM (3) Connectors.
17. Install Air Intake Tube (2). Refer to Air
Intake Tube Replacement.
18. Install Air Cleaner. Follow OEM
procedure.
19. Verify proper operation.
DSM.0052 Ver. 1.0 05/27/2022
Figure 3:
Upper Intake Manifold Bolt Tightening Sequence
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 106 of 117
Valve Cover and Gasket Replacement
REMOVAL PROCEDURE
1. Secure vehicle. Verify engine is cool.
2. Passenger side only: If required; varies
by application. Remove Air Cleaner.
Follow OEM procedure.
3. Passenger side only: Remove Air Intake
Tube. Refer to Air Intake Tube
Replacement.
4. Driver side only and if equipped:
Remove Air Compressor. Refer to Air
Compressor Replacement.
5. Remove Spark Plug Wires (2). Gently
twist Spark Plug Boots (3) 1/2-turn then
pull boots off Spark Plug (4) and Ignition
Coil (1). Figure 1
6.
7.
8.
9.
Do not pull on wire as wire damage
may occur.
Remove four (4) Ignition Coils (1).
Figures 1 and 2
Remove seven (7) Valve Cover
Retaining Bolts (6). Figure 2. NOTE:
Valve Cover may be stuck to the
Cylinder Head. Gently tap Valve Cover
with rubber mallet to loosen cover.
Remove Valve Cover (5-LH or 12-RH)
from Cylinder Head (9). Figures 2 and 3
Inspect Valve Cover Gasket (8) and
Grommets (7) for cracks or damage.
Figure 2.
If damage is found, replace
Gasket or Grommet(s).
1
3
2
4
Figure 1:
Ignition Coil (1), Spark Plug Wire (2),
Spark Plug Wire Boots (3), Spark Plug (4)
6
1
7
8
5
9
Figure 2:
Driver Side Valve Cover (5), Ignition Coil (1),
Valve Cover Retaining Bolt (6) and Grommet (7),
Valve Cover Gasket (8), Cylinder Head (9).
NOTE: Driver side shown; passenger side similar.
Gasket is reusable if no damage is
found. Gasket should be replaced if
cover is being removed due to an oil
leak. Grommets are serviced with Valve
Cover Retaining Bolts.
10. Passenger side only: Inspect Oil Fill
Tube (11), Oil Fill Cap (10), and Oil Fill
Tube Gasket (not shown) for leaks.
Replace as needed. Figure 3
DSM.0052 Ver. 1.0 05/27/2022
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 107 of 117
INSTALLATION PROCEDURE
1. Clean Valve Cover using either mineral
spirits or brake cleaner.
2. Install Valve Cover Gasket (13) in
groove in Valve Cover (14). Figure 4
3. Install Valve Cover (5-LH) or (12-RH)
on Cylinder Head (9). Figures 2 or 3
4. Install Valve Cover Retaining Bolts (6)
and Grommets (7). Figure 2
Tighten Valve Cover Retaining
Bolts (6) in sequence shown. Figure
5. Refer to Engine Mechanical Torque
and Clearance Specifications.
6. Install four (4) Ignition Coils (1).
Figures 1 and 2. Refer to Engine
Sensors and Electrical Components
Torque Specifications.
7. Install four (4) Spark Plug Wires (3).
8. Driver Side Only, if equipped: Install Air
Compressor. Refer to Air Compressor
Replacement.
9. Passenger Side Only: Install Air Intake
Tube. Refer to Air Intake Tube
Replacement.
10. Passenger Side Only: Install Air
Cleaner. Follow OEM procedure.
11. Clean excess oil from engine.
12. Verify fluids are topped off.
13. Bring engine up to operating
temperature and check for oil leaks.
10
11
12
5.
9
Figure 3:
Passenger Side Valve Cover (12), Oil Fill Tube (11),
Oil Fill Cap (10), Cylinder Head (9).
13
14
Figure 4:
Install Valve Cover Gasket (13) in
Valve Cover (14) groove.
Figure 5:
Valve Cover Retaining Bolt Tightening Sequence.
DSM.0052 Ver. 1.0 05/27/2022
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 108 of 117
Valve Lifter Replacement
REMOVAL PROCEDURE
1. Secure vehicle.
2. Verify engine is cool.
3. Remove Upper Intake Manifold. Refer
to Upper Intake Manifold Replacement.
4. Remove Lower Intake Manifold. Refer
to Lower Intake Manifold Replacement.
5. Remove Valley Pan (1). Figure 1
6. Remove Valve Cover(s). Refer to Valve
Cover Replacement.
7. Remove Valve Rocker Arms. Refer to
Roller Rocker Arm Replacement.
8. Remove Pushrods. Refer to Pushrod
Replacement.
9. Remove four (4) Valve Lifter Guide
Retaining Bolts (2) and Retainer (3).
Figure 2
10. Remove Valve Lifter Guide (5). Figure 3
11. Remove Valve Lifter(s) (4) being
serviced. Figure 3
If servicing/ removing compete
set of sixteen (16) Lifters with the
intention to re-use, organize
Lifters in order of removal.
12. Clean and inspect Valve Lifter(s).
DSM.0052 Ver. 1.0 05/27/2022
1
Figure 1:
Valley Pan (1)
2
3
Figure 2:
Remove Valve Lifter Guide Retaining Bolts (2)
and Retainer (3)
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 109 of 117
INSTALLATION PROCEDURE
4
1.
5
Soak Valve Lifters in clean engine oil
prior to installation.
2. Install Valve Lifter(s) (4) being serviced
in their respective Lifter Bores. Figure 3
If re-using Lifter(s), verify Lifters
are returned to original bore
location(s).
3. Install Valve Lifter Guides (5). Figure 3
4. Install Lifter Guide Retainer (3) and
Bolts (2). Figure 2. Refer to Engine
Mechanical Torque and Clearance
Specifications.
5. Install Pushrods. Refer to Pushrod
Replacement.
6. Install Valve Rockers. Refer to Roller
Rocker Replacement.
7. Adjust valve lash. Refer to Valve Lash
Adjustment Procedure.
8. Install Valve Cover(s). Refer to Valve
Cover Replacement.
9. Install Valley Pan (1). Figure 1
10. Install Lower Intake Manifold. Refer to
Lower Intake Manifold Replacement.
11. Install Upper Intake Manifold. Refer to
Upper Intake Manifold Replacement.
12. Fill engine oil.
Figure 3:
Valve Lifters (4) and Valve Lifter Guide (5)
2
3
Figure 4:
Use Valve Lifter Guide Retaining Bolts (2) to
install Retainer (3)
Only use oil specified in
488LPI™ Owner’s Guide.
13. Fill Cooling Pack. Follow OEM
procedure.
Only use coolant specified in
488LPI™ Owner’s Guide.
14. Bring engine to operating temperature
and verify proper operation.
DSM.0052 Ver. 1.0 05/27/2022
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 110 of 117
Water Pump Replacement
REMOVAL PROCEDURE
1. Secure vehicle. Verify engine is cool.
2. Drain coolant from Radiator. Follow
OEM procedure.
3. If necessary (varies by application):
Remove Fan Shroud and Fan. Follow
OEM procedure.
4. Using a 1/2-in drive breaker bar at
position (1), relieve tension on Main
Accessory Drive Belt (not shown).
Refer to Main Accessory Drive Bracket
Replacement.
5. Remove Main Accessory Drive Belt.
Follow OEM procedure.
6. Disconnect Lower Radiator Hose from
Water Pump location (2).
7. Disconnect Air Compressor Coolant
Feed Tube (3).
8. Remove Bypass Hose Clamp (4) and
Bypass Hose (5) from Water Pump.
9. Remove four (4) Water Pump
Retaining Bolts (6).
10. Slide Water Pump (7) off engine studs
and remove.
1
7
5
4
3
2
Figure 1:
Water Pump (7), Lower Radiator Hose Outlet (2),
Air Compressor Coolant Feed Tube (3),
Bypass Hose (5)
7
6
Figure 2:
Remove four (4) Bolts (6) to remove Water Pump (7)
DSM.0052 Ver. 1.0 05/27/2022
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 111 of 117
INSTALLATION PROCEDURE
1. Clean Engine Block to Water Pump
gasket surface.
2. Install new Water Pump Gaskets (not
shown) on engine studs.
3. Install four (4) Water Pump Retaining
Bolts (6). Figure 2
4. Tighten Water Pump Retaining Bolts
using crisscross pattern shown in
Figure 3. Refer to Engine Mechanical
Torque and Clearance Specifications.
5. Install Bypass Hose (5) and Bypass
Hose Clamp (4) on Water Pump.
Figure 1
6. Install Air Compressor Coolant Feed
Tube (3). Figure 1
7. Install Lower Radiator Hose and Clamp
at location (2). Figure 1
8. Route Main Accessory Drive Belt.
Follow OEM procedure.
9. If removed: Install Fan and Fan
shroud. Follow OEM procedure.
10. Fill cooling system. Follow OEM
procedure.
11. Clean spilled fluids from engine.
12. Bring vehicle up to operating
temperature and check for coolant
leaks.
DSM.0052 Ver. 1.0 05/27/2022
Figure 3:
Water Pump Retaining Bolt Torque Sequence
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
Page 112 of 117
Engine Mechanical Torque
and Clearance Specifications
Component
SPECIFICATION*
Metric
SAE
Air Compressor Coolant Return Line Bracket P-clamp Bolt, Large
36 Nm
27 ft-lbs
Air Compressor Coolant Return Line Bracket P-clamp Bolt, Small
15 Nm
11 ft-lbs
Air Compressor Coolant Supply Line Lower P-Clamp Bolt
50 Nm
37 ft-lbs
Air Compressor Coolant Supply Line Upper P-Clamp Bolt
15 Nm
11 ft-lbs
Air Compressor Coolant Supply Line Flare Nut
1.5 F.F.W.R.
Air Compressor Oil Return Line to Air Compressor Bracket Adapter
1.5 F.F.W.R.
Air Compressor Oil Return Line to Oil Pan Adapter
2-3 T.F.F.T
Air Compressor Oil Supply Line to Air Compressor Flare Nut
2 F.F.W.R.
Air Compressor Oil Supply Line Bracket Bolt
15 Nm
11 ft-lbs
Air Compressor Retaining Bolts
60 Nm
45 ft-lbs
Camshaft Retainer Bolts
12 Nm
106 in-lbs
Camshaft Sprocket Bolts
30 Nm
23 ft-lbs
30 Nm
23 ft-lbs
Connecting Rod Nuts
First Pass
Final Pass
+ 90°
Coolant Heater Hose Bracket Bolts
30 Nm
23 ft-lbs
30 Nm
23 ft-lbs
Crankshaft Bearing Cap Bolts
First Pass
Final Pass
+ 90°
Crankshaft Bearing Cap Studs
First Pass
30 Nm
Final Pass
+ 80°
Crankshaft Windage Tray Mounting Nuts
DSM.0052 Ver. 1.0 05/27/2022
23 ft-lbs
488LPI Propane Autogas Engine Mechanical
and Fuel Components Service Manual
50 Nm
37 ft-lbs
Page 113 of 117
SPECIFICATION*
Metric
SAE
Component
Cylinder Head Bolts - In Sequence
First Pass
Second Pass
30 Nm
23 ft-lbs
30 Nm +
120°
23 ft-lbs
+ 120°
Final Pass - Long Bolts #1, 2, 3, 6, 7, 8, 9, 12, 13, 14, 15, 16
60°
Final Pass - Short Bolts #4, 5, 10, 11
30°
Cylinder Head Coolant Hole Plug
50 Nm
37 ft-lbs
Engine Block Coolant Drain Hole M28 Plug - Left Front
60 Nm
- 3X Stronger than the leading full synthetic*
- 10X Better high stress performance**
- 20,000 miles between oil changes***
- Viscosity breakdown as measured in Kurt Orbahn test on 5W...
- As measured in Seq IX test under high load/torque conditions...
- Phosphorus Replacement Technology to help extend the life of...
- Reduces leaks, oil burnoff and power robbing deposits
- 15,000 miles between oil changes*
- Meets or exceeds the following specifications: API SP/SN...
- Or one year, whichever comes first
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: DSM.0052
Replacement Service Bulletin Number:
MFR Communication Date: 2022-05-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.