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| General Service Bulletin (GSB): | Engine Failure Analysis Tips |
| GSB Overview: | This bulletin supplements Workshop Manual information by providing images of engine failures and tips for preventing repeat occurrences. |
| NOTE: This information is not intended to replace or supersede any warranty, parts and service policy, Work Shop Manual (WSM) procedures or technical training or wiring diagram information. | |
Engine Failure Analysis Tips
Guide to Preventing Repeat Engine Failures
Overview
Guide to preventing repeat engine failures
Progression List
Cause
Leading to
- Each damaged engine scenario starts by providing some root cause examples
Effect
Leading to
- The effects of what can occur if root cause is not addressed or the repair is left incomplete listed here
Damage
- End result or damage that can be experienced if root cause of original engine failure is not accurately identified highlighted here
In situations where partial diagnosis suggests engine replacement may be necessary, such as:
- Bearing damage
- Engine noise
- Cylinder misfire
- Loss of compression
- Metal contamination
- Undetermined oil consumption
If the true root cause is not identified (with visual confirmation to the extent of total damage), an over repair or an incomplete repair leading to repeat engine failure may result.
This bulletin targets specific gas engine failure modes and includes a progression list highlighting:
- Cause
- Effect
- Damage
The progression list assists in identifying certain common operational concerns, overlooked contamination scenarios, and incomplete repair possibilities. (see example on left)
Piston Damage
- Pre-ignition
- Excessive Levels of Detonation
- Engine Performance Modifications
- Aftermarket Fuel System Modifications
Misfire from Valve Leakage
- Excessively Lean Conditions
- Excessively High Cylinder Temperatures
- Aftermarket Induction Modifications
Cylinder Wall Scuffing & Scoring
- Catalyst Material Ingestion
Piston and Valve Damage
- Foreign Object Debris
Severe Oil Consumption
- Open Breather Tube Fitting in Place of PCV Valve on 2v Modular V8 & V10
Bent Connecting Rod
- Hydrolock
- Injector Failure
- External Water Ingestion
G0000087
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SaleBestseller No. 1
Mobil 1 Advanced Full Synthetic Motor Oil 5W-20, 5 Quart
- Mobil 1 advanced full-synthetic motor oil 5W-20 utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness.
- Helps protect critical engine parts for up to 10,000 miles between oil changes,* controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
- Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
- Helps extend engine life by working to prevent damaging deposits and sludge buildup
- Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -30 degrees F)
SaleBestseller No. 2
Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT
- MaxLife Technology prevents engine breakdown with 40% better wear protection than the industry standard
- Includes seal conditioners to reduce oil consumption and oil leaks in high mileage engines.
- Added detergents reduce sludge, corrosion, rust and deposits to help keep motors clean inside and ensure a smooth-running engine.
- Advanced friction-fighting additives help maximize performance and improve fuel efficiency.
- Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN
Bestseller No. 3
Quaker State Full Synthetic 5W-20 Motor Oil, 5-Quart
- Full synthetic 5W-20 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
- Designed to deliver more power and less friction, reducing friction to maximize horsepower (compared to Quaker State motor oil)
- Provides improved fuel economy (based on the latest industry standard)
- Excellent protection against formation of sludge and other harmful deposits (based on Sequence IIIH & VH tests on 0W-20 engine oil)
SaleBestseller No. 4
Castrol GTX Full Synthetic 5W-20 Motor Oil, 5 Quarts
- 6X better wear protection on critical engine parts than industry standards**
- 1.3X better sludge protection than industry standards*
- 3X Stronger against viscosity breakdown than leading full synthetic^
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN PLUS/SN | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |
WSS-M2C945-B1 | Meets
Bestseller No. 5
Pennzoil Platinum Full Synthetic 5W-20 Motor Oil, 5-Quart
- Full synthetic 5W-20 motor oil that is made with natural gas and designed to maximize engine protection
- Backed by a 15,000-mile protection guarantee* to protect your pursuit of every mile
- Provides better fuel economy (based on the latest industry standards)
- Keeps pistons cleaner than required by the toughest industry standard (based on Sequence IIIH results)
- Designed for high-performance engines
SaleBestseller No. 6
Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil 5 QT
- Advanced protection against the four main causes of engine breakdown: wear friction heat and deposits
- 40% better wear protection vs. industry standards as tested in the Sequence IVB engine test
- 25% better deposit protection with superior engine cleaning detergents as tested in the GMOD engine test
- 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
SaleBestseller No. 7
Amazon Basics High Mileage Motor Oil, Full Synthetic, SN Plus, 5W-20, 5 Quart
- 5 quarts of high-mileage full synthetic motor oil; SN Plus, 5W-20; high level protection for engines with over 75,000 miles and vehicles with longer drain intervals
- Prevents build up that can cause rust and corrosion
- Reduces friction for less engine wear; helps reduce exhaust emissions
- High resistance to viscosity and thermal breakdown
SaleBestseller No. 8
Pennzoil Ultra Platinum Full Synthetic 5W-20 Motor Oil (1-Quart, Single Pack) (Pack of 2)
- The information below is per-pack only
- Full synthetic 5W-20 engine oil made with natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
- No other leading motor oil provides better wear protection for your engine (Based on Sequence IVA wear test using SAE 5W-30)
- Helps protect engines from loss of power and provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
- 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)
SaleBestseller No. 9
Castrol EDGE 5W-20 Advanced Full Synthetic Motor Oil, 5 Quarts
- 3X Stronger than the leading full synthetic*
- 10X Better high stress performance**
- 20,000 miles between oil changes***
- Approved and Licensed Specifications: Exceeds API SP/SN PLUS/SN/SM |ILSAC GF-6 | Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |
- Viscosity breakdown as measured in Kurt Orbahn test on 5W-30 grade |**As measured in Seq IX test under high load/torque conditions vs. API SP test limits | ***Or one year, whichever comes first
SaleBestseller No. 10
Castrol EDGE High Mileage 5W-20 Advanced Full Synthetic Motor Oil, 1 Quart
- Phosphorus Replacement Technology to help extend the life of the emission system
- Reduces leaks, oil burnoff and power robbing deposits
- 15,000 miles between oil changes*
- Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM ILSAC GF-6 | Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A3
- Or one year, whichever comes first
Last update on 2025-05-10 / Affiliate links / Images from Amazon Product Advertising API
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