NHTSA ID Number: 10017818
Manufacturer Communication Number: 050601026
Summary
INFORMATION ON USE OF BOLT EXTRACTOR TOOL KIT PART NUMBER EN-47702 FOR REMOVING BROKEN CYLINDER HEAD OR MAIN BEARING CAP BOLTS ON INLINE TRUCK ENGINES. *TT
25 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
BUICK | RAINIER | 2004-2006 |
| CHEVROLET | COLORADO | 2004-2006 |
| CHEVROLET | TRAILBLAZER | 2002-2006 |
| GMC | CANYON | 2004-2006 |
| GMC | ENVOY | 2002-2006 |
| HUMMER | H3 | 2006 |
| OLDSMOBILE | BRAVADA | 2002-2004 |
| SAAB | 9-7X | 2005-2006 |
A Torque To Yield (TTY) bolt, like a cylinder head bolt or main bearing cap bolt, may break during repair procedures.
Interaction between a TTY bolt and threads may cause the bolt to bind or break on removal.
Prior to removing the cylinder head or main cap bolts, perform the following procedure:
Using an appropriately sized punch and hammer, rap on the head of each bolt.
The vibration produced by this procedure will assist in successful removal.
If a head bolt or main bolt breaks during engine disassembly, a broken bolt extractor kit (EN-47702) has been released to assist in removal of the remaining bolt segment.
Many times the remaining bolt segment will back out easily with a pick tool or a reverse twist drill bit.
NHTSA ID Number: 10017818
Manufacturer Communication Number: 050601026
- APPLY TO MOST DRILLS : 6 pieces screw extractors work with any drill and all the screw size or bolt (3-12mm), These extractor tools are used to reverse the damaged screw counterclockwise until it is released
- The DIY Tools for Men-Men won't know they need screw extractor set until they have one! This screw extractor set is GIFTS WRAP AVAILABLE, can be gifted to your loved ones as it reflects a fresh trend with fun and practical. Amazing and Unique tool gifts for men women. The must have stocking stuffers for men, gifts for dad, husband, father, him, guy teens, adult, Boyfriend, son on Birthdays, Christmas, Fathers Day or anniversary. Perfect Holiday Gifts Guide
- HIGH QUALITY - This damaged screw remover tool kit is made from High-Speed Steel H.S.S 4341# , which have high hardness of 63hrc, it's durable and easily to remove any damaged screws.
- EASY TO USE: Just two simple steps to get the job done - drill a hole with a cutting size using the right size screw extractor and easily remove the screw or bolt using the removal tool Hardness 63-65HRC: Titanium hardened steel material, more durable than most screw extractors on the market, better hardness and durability than others, buy with confidence and complete peace of mind
- Cool Gadgets for Men Dad Christmas Birthday Gifts for Men and Women - Men won't know they need screw extractor sets until they have one! Every screw has the potential to rust and break, which can create a situation where it cannot be removed. Owning it, there will be no anxiety about rusty screws. This screw extractor set is GIFTS WRAP AVAILABLE, can be gifted to your loved ones as it reflects a fresh trend with fun and practical. Amazing and unique tool gifts for men women. A must have stocking stuffer for men on birthdays, Christmas, Father's Day or anniversaries, a gifts for dads, husbands, fathers, him, adults, boyfriends, sons. The best and most practical and surprising Christmas gifts
- Save Time and Effort: Broken bolt extractor kit are used to remove stuck, broken or screwed tools. The stripping bolt remover and extractor easily removes damaged screws, studs, bolts and other accessories.
- Unique Design: ez out bolt extractor set is designed with a 135°angle, which makes it easier to cut into the workpiece and has less axial resistance. This design can not only increase the working length of the cutting edge, but also reduce the thickness of the cutting layer, which making the cutting effect better and without damaging other working areas.
- Multi-Purpose: Simple drill extractor is multipurpose on your life. Bolt extractors that remove broken screws, whether working on wood or metal, are ideal for construction, automotive, home DIY projects or for industrial use.These extractors are excellent if you are working in a production environment and using screw head bolts.
- High and Durable Material: The left hand drills are made from cobalt fortified HSS material, which increases durability and service life.This screw extractor has strong wear resistance and clear chip removal. HSS is harder, tougher and easier to drill, turn and remove damaged screw or bolts than other materials.
- Multiple Sizes: 5pcs HSS left hand drill bits and 5 alloy steel bolt extractor. Screw extractors include 1#, 2#, 3#, 4#, 5#. Left hand drill models include 1/8", 5/32", 3/16", 1/4", 19/64".With a portable storage case that provides excellent protection and against lost screw extractors.
- 【Premium & Drable】The GRLCOOD bolt extractor kit is made of high-hardness alloy steel. Each surface has undergone sandblasting treatment to make it harder, effectively extending the product's lifespan. It features robust durability, better wear resistance, and can withstand high-intensity use to meet your needs
- 【Multiple Size Options】Our 3/8-inch nut remover set comes in various sizes including 3/4" (19mm), 11/16", 17mm, 5/8" (16mm), 9/16" (14mm), 13mm, 1/2", 12mm, 7/16" (11mm), 10mm, 3/8", 5/16" (8mm), 1/4", and 1 hex handle socket adapter. All stripped bolt extractor set are laser-etched for easy identification and universal design
- 【Sturdy Safe Storage】The GRLCOOD multi-flute extractor disassembly tool features an internal left-hand spiral design for better grip, effectively removing broken and stuck bolts. Heavy duty blow molded case keeps all the bolt remover set stay organized. Sturdiness and durability. The palm-sized box design is easy to carry and store
- 【Wide Application】The GRLCOOD stripped screw extractor is suitable for both power and hand tools, Easily remove lug nuts, drain oil plugs, broken and stuck bolts, and remove damaged studs, bolts, nuts and screws, accessories and pins. It can be used as a car tool or for mechanical maintenance and home decoration needs
- 【High-quality Service】 You will receive our GRLCOOD 14-piece nut extractor socket set. It is an efficient tools that will assist you in completing various daily maintenance tasks. If you have any questions, please contact us immediately. We provide you with service in the first time
- AGGRESSIVE SPIRAL GRIP: Precision-engineered reverse spiral flutes bite deeper as torque is applied, tightening as you turn. This allows stubborn bolts and nuts to break free quickly and safely without slipping
- FULL SAE & METRIC SIZES: Includes 13 extractor sockets from 1/4" to 3/4" (8–19mm), plus 2 pcs 3/8" hex adapters, 1 knock-out pin, and gloves. Laser-etched markings ensure quick identification, providing a complete, ready-to-use solution for automotive, mechanical, and home repairs
- VERSATILE TOOL COMPATIBILITY: Standard 3/8" square drive with 1/4"-3/8" hex adapters fits hand ratchets, impact wrenches, air ratchets, and adjustable tools. Use the tools you already own for automotive repairs, DIY projects, or home maintenance
- PREMIUM CR-MO STEEL: This bolt extractor kit is crafted from high-hardness chrome molybdenum (CR-MO) alloy steel. Heat-treated and sandblasted with a gray oxide finish for superior strength, corrosion resistance, and long-lasting durability under high-torque, heavy-duty use
- STURDY & PORTABLE CASE: Heavy-duty blow-molded case keeps all sockets and accessories organized, protected, and easy to carry. Compact palm-sized design ensures convenient storage and transport, keeping your bolt extractor kit secure and ready for any repair task
- Heavy-Duty Construction – Forged from heat-treated Chrome Molybdenum alloy steel (CrMo) and hardened to HRC 40-45, this extractor withstands high torque. The chrome finish adds protection against corrosion for reliable performance in tough conditions
- Internal Gripping Design – Features a built-in manual adjustment mechanism. Simply turn the bottom hex nut to engage the internal gripping heads, which clamp onto stripped, rounded, or broken bolts and studs from 1/4" to 1/2" in size
- Universal Design Advantage – Replaces a full set of extractors with one compact tool. Unlike traditional multi-piece sets, this single unit covers 1/4" to 1/2" sizes, simplifying your toolkit and saving storage space
- For Stubborn Fasteners – Designed for the most stubborn fasteners. Effectively removes seized, painted, or rusted bolts from automotive parts like exhaust manifolds and fuel plugs, as well as general machinery and equipment repairs
- Easy Removal Process – Place the extractor over the damaged stud. Turn the bottom hex nut counterclockwise to tighten the jaws, then continue turning to back out the bolt. Compatible with 3/8” drive ratchets and impact wrenches
Last update on 2026-06-19 / Affiliate links / Images from Amazon Product Advertising API
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#05-06-01-026B: Information On Torque to Yield Bolt Breakage and Use of Bolt Extractor Tool Kit Part Number EN-47702 for Removing Broken Cylinder Head or Main Bearing Cap Bolts on Inline Truck Engines (OCT 21, 2008)
| Subject: | Information On Torque to Yield Bolt Breakage and Use of Bolt Extractor Tool Kit Part Number EN-47702 for Removing Broken Cylinder Head or Main Bearing Cap Bolts on Inline Truck Engines |
| Models: | 2004–2007 Buick Rainier |
| 2002–2009 Chevrolet TrailBlazer |
|
| 2004–2009 Chevrolet Colorado |
|
| 2002–2009 GMC Envoy | |
| 2004–2009 GMC Canyon | |
| 2002–2004 Oldsmobile Bravada |
|
| 2006–2009 HUMMER H3 |
|
| 2005–2009 Saab 9-7X |
|
| with 2.8L, 2.9L, 3.5L, 3.7L or 4.2L Vortec Inline Engine (VINs 8, 9, 6, E, S — RPOs LK5, LLV, L52, LLR, LL8) |
This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 05-06-01-026A (Section 06 — Engine/Propulsion System).
A Torque To Yield (TTY) bolt, like a cylinder head bolt or main bearing cap bolt, may break during repair procedures.
Interaction between a TTY bolt and threads may cause the bolt to bind or break on removal.
Prior to removing the cylinder head or main cap bolts, perform the following procedure:
Using an appropriately sized punch and hammer, rap on the head of each bolt.
The vibration produced by this procedure will assist in successful removal.
If a head bolt or main bolt breaks during engine disassembly, a broken bolt extractor kit (EN-47702) has been released to assist in removal of the remaining bolt segment.
Many times the remaining bolt segment will back out easily with a pick tool or a reverse twist drill bit.
Bolt Replacement & Tightening
Important: Never reuse TTY main bearing or cylinder head bolts. Always make sure that the engine block threaded holes are clean and do not place oil or threadlocker on the bolts.
Utilize a thread chase tool followed by cleaning with dry compressed air to insure threads are clean and dry prior to installation of new TTY bolts.
Bolts that creak and snap while tightening will fail due to excessive torque caused by threads contaminated with debris, antifreeze or oil.
Trace amounts of oil or antifreeze will cause this condition. In extreme cases the threads may need additional cleaning with a non-residue cleaner like a brake clean product followed by drying with clean & dry compressed air.
Bolt Extractor Tool Kit Part Number EN-47702
The bolt extractor kit EN-47702 provides the following components to assist in removal of the broken bolt segment:
- One 5/32″ reverse twist drill – part number EN-47702-6
- One double-ended drill pilot insert – part number EN-47702-1 (ensures a straight drilling procedure)
- Drill pilot inserts for larger diameter heads or main cap bolts – part number EN-47702-2 (ensure a straight drilling procedure)
- Bolt extraction #3 EZ out – part number EN-47702-3 (after the drilling procedure)
- Bottom tap (M11 X 2) – part number EN-47702-5 (for the head bolts to chase the threads after the completion of bolt removal)
- Bottom tap (M10 X 1.5) – part number EN-47702-4 (for the main bolts to chase the threads after the completion of bolt removal)
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