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NHTSA ID Number: 10113607
Manufacturer Communication Number: 15-06-01-001
Summary
This technical bulletin provides inspection and repair information to correct a customer concern of an oil leak at the rear of engine.
Condition
Engine oil leak. Oil coming from the rear of the engine, a possible crankshaft rear oil seal leaking.
Parts
Part Number | Description | Qty |
55571538 | BOLT, A/TRNS FLEX PLATE | 6 |
55559650 | BOLT, FLYWHEEL | 6 |
12345382 | Sealant | 1 |
10953489 | Sealant (Canada) | 1 |
2 Affected Products
Vehicles
MAKE | MODEL | YEAR |
CHEVROLET | CRUZE | 2015 |
CHEVROLET | SONIC | 2015 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 15-06-01-001
Date: Apr-2015
https://www.nhtsa.gov/recalls?nhtsaId=10113607
MC-10113607-9999.pdf 315.085KB
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- MaxLife Technology prevents engine breakdown with 40% better wear protection than the industry standard
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- Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN
- Full synthetic 5W-30 motor oil provides strong engine performance and protection against deposits between oil changes
- Ideal for use in modern turbocharged engines and high-performance vehicles like sports cars, SUVs, trucks, and minivans
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- 6X better wear protection than industry standards, as measured in the latest Sequence IVA test
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- 40% better wear protection vs. industry standards as tested in the Sequence IVB engine test
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- Full synthetic formula offers 24X stronger protection against engine-killing contaminants than the leading full synthetic motor oil
- Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN, GM dexos 1 Gen 3
- Mobil 1 advanced full-synthetic motor oil 5W-30 utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness.
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- Provides better fuel economy (based on the latest industry standards)
- Pennzoil Platinum 5W-30 keeps pistons up to 45% cleaner than the toughest industry standard (Based on Sequence IIIH results)
- Provides unsurpassed wear protection (compared to industry standard Sequence IVA test)
- Full synthetic 5W-20 engine oil with PurePlus Technology that is race-trusted for unbeatable engine protection*
- Pennzoil Ultra Platinum helps extend engine life and protects for up to 20 years or 750,000 miles, whichever comes first** (see warranty information in Product Description)
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- Keeps pistons dramatically cleaner than required by the toughest industry standards (based on ILSAC GF-6 and Sequence IIIH piston deposit test using SAE 5W-30)
- Ultimate protection against wear, friction, heat and deposits, the main reasons for engine breakdown
- 24x stronger protection against engine-killing contaminants than the industry-leading full synthetic
- Dual Defense Additive Technology helps keep your engine clean and running at peak performance for optimal fuel economy and performance
- 10X stronger against oil breakdown and 50% greater wear protection than industry standards
- Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN, dexos 1 Gen 3
- Titanium Strong For Maximum Engine Performance In Vehicles With Over 75,000 Miles
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- Boosted With Extra Fluid Titanium Technology To Increase Oil Film Strength And Reduce Film Breakdown
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- Premium full synthetic 5W-30 engine oil is designed for vehicles with over 75,000 miles, made with natural gas, and maximizes engine protection
- Backed by a 15,000-mile protection guarantee* to help you go longer between oil changes (see warranty information in Product Description)
- Keeps pistons up to 45% cleaner than the toughest industry standard (based on Sequence IIIH results)
- No other leading high mileage motor oil provides better protection from friction (based on Sequence IVA wear test using SAE 5W-30)
- Formulated to deliver less oil burn off than high mileage motor oils made from crude oil
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Bulletin No.: 15-06-01-001 Date: Apr-2015 Subject: Oil Leak at Rear of Engine Models: 2015 Chevrolet Cruze, Sonic Equipped with 1.4L Engine (RPO LUV) Built After VIN Breakpoint F7182003 (Cruze) and F4169885 (Sonic) Attention: This Bulletin only applies if the root cause of an oil leak is from the improperly drilled crankshaft threads and to reference future service on affected vehicles. Condition Some customers may comment about an engine oil leak. Technicians may find the oil coming from the rear of the engine, a possible crankshaft rear oil seal leaking. Cause The actual cause for the engine oil leak may be coming from the transmission flex plate or flywheel bolts due to the crankshaft threads being improperly drilled. Correction If the condition above is present, removal of the transmission flex plate or flywheel is necessary to inspect for improperly drilled crankshaft threads that are used for the flex plate or flywheel bolts. Crankshaft Thread Inspection: 1. Remove the transmission flex plate or flywheel. Refer to the Automatic Transmission Flex Plate Replacement or Engine Flywheel Replacement in SI. Note: Ensure to use NEW bolts whenever the automatic transmission flex plate or flywheel is removed. 2. Inspect the 6 crankshaft threaded bores as illustrated above. • Threads on the left of the image have the complete circumference of threads and is NOT the root cause of the oil leak. 1 • Threads on right of the image have the partially, not complete circumference of threads and is most likely the root cause of the oil leak. Note: If the threads are incorrect, there will be oil present on the bolts’ threads and mating surface to the flywheel or flex plate. 3. If all of the threads in the bore are correct, do not use this procedure because this is not the root cause of the oil leak. Continue diagnoses of the origins of the oil leak. 4. If the threads are incorrect, clean the affected threads with M 9×1 mm thread cutter. Important: In order to avoid engine contamination, do NOT go past the depth of 20 mm with the cutter. Note: The thread cutter will not correct the lack of threads in the bore. It is only used to clean the remaining bolt thread lock in the bore to allow for a better sealer adhesion. 5. Clean all 6 crankshaft bores with Brake Cleaner or equivalent. 6. Before reinstalling the flex plate or flywheel, apply Sealant P/N 12345382 (in Canada, use 10953489) or Loctite 243 or equivalent to the 6 bolts as illustrated above. Note: Do NOT replace the clutch pressure and driven plate if it is not oil contaminated. • Ensure to cover 4-5 threads (1) of the bolt before the pre-applied thread lock and cover 1-2 threads (2) of the pre-applied thread lock. 7. Reinstall the transmission flex plate or flywheel. Refer to the Automatic Transmission Flex Plate Replacement or Engine Flywheel Replacement in SI. Service of the Transmission Flex Plate or Flywheel Some engines and vehicles were serviced at the assembly plant for this condition and are outside of the published VIN range in this bulletin. If the engine or vehicle was serviced at the assembly plant, for this condition, there will be a green dot or mark on the 6 flex plate or flywheel bolts. This is an indicator that the service procedure in this bulletin has been performed. On all 2015 Chevrolet Cruze and Sonic vehicles with a 1.4L (LUV) engine, all future flex plate or flywheel bolt removal will require this bulletin’s inspection and service procedure to be performed. If this bulletin’s repair procedure was performed in the dealer service, it will not have any green paint marks applied to the bolts. Please use Investigate Vehicle History (IVH) to confirm if this bulletin has been applied to the vehicle. The claiming of the unique labor code in this bulletin indicates that the engine was serviced for improperly drilled bolt holes and reapplication of the sealer is necessary upon installation of the flex plate or flywheel bolts. The unique labor operation in this bulletin can be only claimed once per vehicle. When applying the inspection and repair procedure in this bulletin after it was previously performed, use Other Labor Hours (OLH) not to exceed 0.3 hr. to the labor operation being claimed. Parts Information Part Number Description Qty 55571538 BOLT, A/TRNS FLEX PLATE 6 55559650 BOLT, FLYWHEEL ptxt 6 12345382* (in Canada, use 10953489) Sealant 1 2 *There is enough material to perform multiple vehicles. Store the remaining material for future use. Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Note: • This unique labor operation number should only be claimed once per vehicle. • Do not use this unique labor code if the crankshaft thread bores are correctly drilled. Use the appropriate labor code for the repair that corrects the oil leak. Labor Operation Description Labor Time 4080908* Clean Crankshaft Threads and Apply Sealant to Bolts (Automatic Transmission) 7.4 hrs Clean Crankshaft Threads and Apply Sealant to Bolts (Manual Transmission ) 6.8 hrs *This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide.
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