NHTSA ID Number: 10127197
Manufacturer Communication Number: PIP4836A
Summary
This Preliminary Information communication provides information to the technician about vehicle that have an oil leak that appears to be from the flywheel housing cover sealing surface. The technician will need to check the for leaks at the turbo charger oil feed hole as well as for damage or porosity. Check the upper oil pan as well as the upper oil pan to flywheel housing and the upper to lower oil pan. Leaks from the oil cooler can cause damage to the oil cooler O-rings. The engine block oil gallery cup plugs can also be a cause of the leak. If the oil gallery cup plug is found to be leaking replace all 3 of them at the same time.
5 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CHEVROLET | EXPRESS | 2015 |
| CHEVROLET | SILVERADO 2500 | 2015 |
| GMC | SAVANA | 2015 |
| GMC | SIERRA 2500 | 2015 |
| GMC | SIERRA DENALI | 2015 |
Parts
| Plug, Engine Block Oil Galley (19mm) | 3 | 12651561  |
| Subject: | Rear Of Engine Oil Leak |
|---|---|
| Models: | 2015 Chevrolet Express, Silverado |
| 2015 GMC Savana, Sierra | |
| Equipped with 6.6L Duramax Diesel Engine RPO codes LGH or LML |
This PI was superseded to update Model Years and Recommendation/Instructions. Please discard PIP4836.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
A dealer may encounter a customer concern of an engine oil leak.The oil leak may seem like it is emanating from the flywheel housing cover sealing surface.
Recommendation/Instructions
Complete the current Service Information diagnostics for oil leak diagnosis.
Check for leaks at the turbocharger oil feed and oil drain line connections at the block and flywheel housing.
- Inspect the turbocharger oil feed hole for signs of damage or porosity.
- Inspect for imperfections in the gasket sealing surfaces (lack of flatness, debris or damage to the feed line banjo fitting itself.)
- Check for leaks from the oil pan sealing surfaces. Leaks from the oil pan area could be from the sealing surfaces of the upper oil pan, upper oil pan to flywheel housing and/or from the lower oil pan to upper oil pan.
Important: If repairs are made to the oil pan sealing surfaces be sure to clean both sides of the sealing surfaces with brake cleaner and allow to dry completely before re-assembling.
- Check for leaks at the engine oil cooler. Leaks from the oil cooler can be caused by debris or damage to the oil cooler O-ring.
- Check for leaks at the engine block oil gallery cup plugs.
There are sub-oil galleries that run the full length of the block on both sides of the engine (same gallery that feeds oil pressure sensor). These galleries end at the rear of the block and are sealed with cup plugs (properly listed and available in GMSPO parts imager). Since these galleries run on either side of the engine, this oil leak may be found on the right or left rear of engine. The flywheel housing cover must be removed to service these plugs.
If one oil gallery cup plug is found to be leaking, replace all three (two on the left and one on the right) cup plugs at the same time the flywheel housing is resealed.
Refer to Service Information Document for Engine Block Cleaning and Inspection for replacement information.
When replacing these oil gallery cup plugs use Loctite 272 (or Equivalent) part number 89021297 (in US) or 10953488 (in Canada) as a sealer.
During cup plug replacement ensure at least 1 mm of recess when pressing in the plug.
Parts Information
| Part Number | Description | QTY |
|---|---|---|
| 12651561 |
Plug, Engine Block Oil Galley (19mm) | 3 |
Warranty Information
For vehicles repaired under warranty use:
| Labor Operation | Description | Labor Time |
|---|---|---|
| 4067010 | Flywheel Housing Replacement | Use Published Labor Operation Time |
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
Additional SI Keywords
Galley
Bulletin No.: PIP4836A
Date: Sep-2015
https://www.nhtsa.gov/recalls?nhtsaId=10127197
https://static.nhtsa.gov/odi/tsbs/2015/MC-10127197-9999.pdf
To View or Download this Document Click Here
Loading...
Reload document 
Open in new tab
- Provides 1. 5% improved fuel economy performance compared to SAE 15W-40 oils
- Triple Protection Plus formula combines fully synthetic base oils with advanced additives for excellent equipment protection and long engine life
- Formulated with additive technology that protects against the effects of soot, dirt and other contaminants
- Engineered with shear stability to resist viscosity loss and maintain optimal engine oil pressure
- Suitable for diesel-powered vehicles from tractor/trailers to classic cars and heavy-duty diesel pickups that allow an SAE 5W-40
- For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
- Provides 1. 5% improved fuel economy performance compared to SAE 15W-40 oils
- Triple Protection Plus formula combines fully synthetic base oils with advanced additives for excellent equipment protection and long engine life
- Formulated with additive technology that protects against the effects of soot, dirt and other contaminants
- Engineered with shear stability to resist viscosity loss and maintain optimal engine oil pressure
- Better wear protection
- Increased fuel efficiency
- Better protection of the expensive catalytic emission system
- Improved compatibility with fuels containing ethanol
- Royal Purple 44154 API-Licensed SAE 15W-40 High Performance Synthetic Motor Oil - 1 Gallon Jug, (Pack of 3), Superior corrosion protection
- New packaging coming! Red bottles contain the same great product as the black bottles.
- Improves engine durability without affecting fuel economy.
- Keeps engines cleaner: minimal sludge, soot and carbon buildup.
- Friction modified with Micron Moly and Penetro to reduce friction, wear and scuffing.
- Resists thinning at high temperatures
- Meet the Mack EO-O Premium Plus specification and API CK-4/SN specification
- Meets the performance requirements of most diesel engine manufacturers such as Caterpillar, Cummins, Detroit Diesel, Ford, Mack, Navistar, and Volvo
- Superior Anti-oxidation characteristic
- Extended drain intervals
- “The Only One“ endorsed and recommended by Cummins
- Superior synthetic base stocks provide faster, safe starts during freezing weather and enhanced thermal properties for hot weather operations
- Outstanding oxidation resistance supports long oil life in heavy duty engines
- Superior wear protection for hardworking heavy-duty trucks and equipment
- Exceptional resistance to high-temperature varnish and low-temperature sludge deposits to help keep engines clean
- Wide viscosity range provides outstanding protection consistent with an SAE 40 grade oil at high temperatures, combined with the easy cold-start performance of a 5W rated oil
- Outstanding wear protection
- Excellent high- and low-temperature performance; Pours at temperatures as low as -53 degree Fahrenheit and protects at oil temperatures as high as 400 degree Fahrenheit
- Improved protection against sludge and harmful deposits; Excellent fuel economy benefits
- Case of 6 // 1 Gallon Each
- Better wear protection Increased fuel efficiency
- Better protection of the expensive catalytic emission system
- Improved compatibility with fuels containing ethanol Superior corrosion protection
- Triple Protection Plus technology protects against wear, deposits and oil breakdown plus provides better low temperature flow compared to SAE 15W-40 oils
- Helps control engine deposits for reliability at extended oil drain intervals
- Formulated to control engine wear, 37% better than the maximum wear requirements in API CK-4 engine wear tests
- Heavy duty engine oil formulated with synthetic base oil components
- Delivers improved oxidation performance for increased resistance to breakdown under high temperatures compared to the previous formulation
Last update on 2021-01-16 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2021-01-16 / Affiliate links / Images from Amazon Product Advertising API
No Responses