tapered seat spark plug thread repair

FORD F-150, 4.9 liter V8 1993 Ford 3 valve heads 10; FIG. Further, the dimensions of the thread insert are such that when installed into the cylinder head, the spark plug inserted into the thread insert is at substantially the same depth in the cylinder as it would have been in the undamaged bore. In this embodiment, the flanged head. Carbon tracking can cause the spark plug or spark plug wire to short out leading to either no spark or a weakened spark in the cylinder. The tools of the invention allow the easy and accurate drilling and tapping of the spark plug bore and the easy insertion of the thread insert. The thread insert may be formed of various materials, preferably a material harder than aluminum, such as steel or a steel alloy, which will better resist thread damage than aluminum. 9, a top plan view of the guide pilot, taken from the right side of FIG. The recessed, non-threaded neck area serves as a collector for excess bonding agent, such as J-B Qwik Weld, which can be applied to the exterior threads of the insert during installation to bond the insert to the cylinder head. Without a resale certificate 7.0% Sales tax in Florida. on a chamber side repair. 1, showing a thread insert of the invention installed in the spark plug bore; FIG. Preferably, a fluid, such as carburetor cleaner, is squirted into the hole to make it easier to get the shavings out and the shavings are sucked out using a vacuum hose, such as a plastic gas hose or line attached to a vacuum source. This is extremely costly to a consumer because the cylinder heads are expensive to purchase and difficult and expensive to replace. It should be realized that an important feature of the invention is to provide a repaired spark plug bore having a tapered seat configured similarly to the original bore to operatively and sealingly accept the same spark plugs as originally used and as used in all undamaged spark plug bores, and to provide about the same spark plug extension into the cylinder of the engine as originally provided. These types of inserts require that the damaged bore be drilled out to a larger diameter and re-threaded with a commercially available tap. The final size hole for the insert is drilled with an eleven sixteenth inch drill bit and tapped with a three quarter inch NF thread tap to provide three quarter inch NF threads in the cylinder head. Years 95 to 00 2.0 liter engines used 24mm reach TAPER SEAT spark plugs. This prevents the bonding agent from globing into the spark plug bore in uncontrolled fashion. The lower portion of the guide pilot has a smaller diameter in order for it to snugly slide into the upper portion of the spark plug bore. In addition to the thread insert, the invention also provides a kit of tools for use in installing the thread insert of the invention and a method of installing the thread insert of the invention using such tools. The spark plug bores in these engines have only about four full threads. 11, a top plan view of a stop pin included as part of the kit of tools; FIG. 18 showing the position of the tap after tapping; FIG. | Responsive Website Design by HEROweb | eCommerce Development -powered by MightyMerchant v5.5. Unlike prior art thread replacement devices and methods, the thread insert and method of the present invention allows the repair of a damaged tapered seat spark plug bore in deep spark plug bores without the needless expense and headache of removing and replacing the cylinder head or the use of an insert, such as a helicoil helical insert, that does not allow the use of the original type of spark plugs. The threaded inner bore of the insert then serves as the new threads for the spark plug. 11. It is presently preferred to include the second drill bit and second guide pilot so that the repair may be made using manual socket wrenches or lower power air ratchet wrenches. These will also be provided as the inner threads in the insert to mate with the spark plug threads. 20, a side elevation of a thread insert of the invention and a spark plug ready to be screwed into the thread insert; FIG. Click here for info, M14x1.25 FORD SPARK PLUG BLOW OUT FREQUENTLY ASKED QUESTIONS According to the invention, a thread insert is provided that replaces both the threads and tapered seat of a damaged tapered seat spark plug bore. The only special consideration is the use of guide pilots to ensure correct alignment in the cylinder head and that the piston head is not damaged. The thread insert may be adapted to conform to different engine designs. In the accompanying drawings, which represent the best mode presently contemplated for carrying out the invention: FIG. p) installing the thread insert and spark plug as a unit into the new bore using a spark plug wrench. 5, a vertical section taken on the line. FORD , 5.0 & 5.8 liter V8 1986-1996 8, a side elevation, partially in section, of a guide pilot used during installation of the thread insert of the invention and part of the kit of tools of the invention; FIG. Both the loss of combustion pressure and carbon tracking results in unsatisfactory engine performance. The insert is then threaded into the bore using the newly tapped threads. 16, a fragmentary vertical section similar to that of FIG. This means that the damaged threads will be at the bottom end of the bore and very difficult to get to. A faulty airtight seal can cause a loss of combustion pressure in the engine. 17, a fragmentary vertical section similar to that of FIG. 3-5, an insert length from the bottom of the flange of 0.710 inch has been found to correctly position the bottom of the insert at the bottom of the spark plug bore and top of the cylinder. A kit of tools for repairing a tapered spark plug bore according to, 18. Also, the shape of the inner bore is easily determined since it is governed by the specifications of the tapered seat spark plug recommended by the engine manufacturer. A method for repairing a damaged tapered seat spark plug bore according to. Special tools make the installation of the insert easy and accurate. Ford 3 valve heads 1995 to 2000 This leads to two complications. After the drilling and tapping are complete, the cylinder is vacuumed out to remove the metal shavings that result from the drilling and tapping steps. A non-threaded portion in the inner bore is disposed above the threaded portion of the inner bore and the top of the thread insert and includes a taper formed in the insert to mate and seal with the tapered seat of the spark plug. This invention relates to devices and methods for replacing damaged spark plug bores in internal combustion engines, and in particular, to permanently installed thread inserts and methods for installing the thread inserts. The method may also include the additional step of: q) obtaining a guide pilot having an internal bore of a size to closely accept a desired size drill bit therethrough smaller than the drill bit needed to drill a hole for the tap and having a lower portion sized to snugly fit into the upper portion of the spark plug bore; r) positioning the lower portion of the guide pilot with the tap extending therefrom in the upper portion of the spark plug bore to align the guide pilot with respect to the bore; s) obtaining a drill bit of desired smaller size to fit in the internal bore of the guide pilot; t) attaching the drive means to the smaller size drill bit to cause rotation of the smaller size drill bit; u) using the guide pilot and drive means, drilling out the damaged spark plug bore below the guide pilot; and v) removing the guide pilot and drill bit from the bore. 14, a vertical section taken on the line. "rampa bolts" the external surface of the insert being threaded, Details of equipment for threading other than threading tools, details of the threading process, Producing or refurbishing threads for spark plugs or glow plugs, GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER USPC, TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION, Repairing by attaching repair preform, e.g., remaking, restoring, or patching, GM Global Technology Operations LLC (n. d. Ges. The threads are either stripped entirely or become cross threaded. This in the newer A kit of tools for repairing a tapered spark plug bore according to, 16. Zetec, Zetec Ref# SP487, SP-487, ITV24, AYFS092FE1, AYFS-092-FE1, AYFS092FEC, AYFS-092-FEC, FORD ESCAPE V4 2.0 liter No duplication is permitted John 3:16 |, STANDARD TIME-SERT Spark Plug Repair Kits & Inserts, OVERSIZED Big-Sert M14x1.25 Spark Plug Repait Kits & Inserts, TIMESERT FORD SPECIFIC PROFESSIONAL SPARK PLUG THREAD REPAIR KITS, M14x1.25 FORD SPARK PLUG BLOW OUT FREQUENTLY ASKED QUESTIONS. As indicated, the taper will be positioned in the insert to correctly position the spark plug for the particular engine with which the insert will be used. 2001 to 2004 In particular, the inner bore has a threaded portion toward the distal end to receive the threaded end of the spark plug. This is important because drilling and tapping a tapered seat spark plug bore destroys the tapered seat in the bore. M18x1.5 taper seat. Call center in Florida - warehouses throughout the USA. 12, a top plan view of the drill bit taken from the right side of FIG. Further, a damaged spark plug bore in an aluminum cylinder head repaired with the thread insert is superior to the stock head configuration because the thread insert is much less susceptible to damage from cross threading or stripping since it is made from a harder metal than aluminum, such as steel or a steel alloy. 8" in over all length using the longer wrench. Commonly used for spark plug blow outs in Ford 16 showing the position of the drill bit after drilling; FIG. MERCURY MYSTIQUE You need kit p/n 4412E and insert p/n 44111 use required Sealer p/n 6020. Larger tooling and inserts are needed when a Helicoil or some other competitive brand has failed. a guide pilot having an internal bore of a size to closely accept a desired size drill bit therethrough and having a lower portion sized to snugly fit into an upper portion of the spark plug bore to thereby align the guide pilot and internal bore in the spark plug bore; a tap of a size for producing threads to mate with threads of the exterior threaded shaft of the thread insert and having a portion sized to extend through the internal bore of the guide pilot; and. This makes successful installation of a prior art thread insert very difficult. The flange also allows for easy insertion of the insert using only the spark plug and a normal spark plug wrench or socket. The kit will preferably include the bonding agent such as tubes containing the two parts of two part epoxy, and may include a second drill bit and second guide pilot for use with the second drill bit. FIG. When the threads are damaged, the tapered seat spark plug may not sit properly in the bore which prevents the air tight seal from forming. A non-threaded and recessed neck is preferably interposed between the exterior threaded shaft and the flanged head. This securely holds the insert in place to allow a spark plug to be removed from the insert while the insert remains in the cylinder head. Accordingly, there has existed a need for a thread insert that can replace both the threads and tapered seat in a damaged spark plug bore, which is relatively simple and easy to install, and that will allow the use of the original, factory specified spark plug after the repair is complete. Instructions page, FORDFOCUSSVT (Zetec) 18, a fragmentary vertical section similar to that of FIG. A method for repairing a damaged tapered seat spark plug bore in an internal combustion engine wherein the bore has an upper portion extending from an access opening to a taper therein, comprising the steps of: a) obtaining a thread insert according to. For first time repairs only. For example, it does not matter whether a drill is inserted through the guide pilot before or after it is inserted into the spark plug bore or is removed before or after the guide pilot is removed from the spark plug bore. Call center in Florida - warehouses throughout the USA. FIG. 13. The tap in the wrench is approx. 4, a top plan view of the thread insert of FIG. 13; FIG. 2 valve or 4 valve Engines. A kit of tools for repairing a tapered spark plug bore where threads in the bore have been damaged, the repair being accomplished with a thread insert according to. 16 showing the tap and guide pilot of the invention in place ready to tap new threads into in lower portion of the bore; FIG. 15, a top plan view of the tap taken from the right side of FIG. This leads to Ford's recommendation of replacement of the cylinder head to repair damaged threads in the spark plug bore. 1, but shows the threads of the spark plug bore repaired in accordance with the invention. 2008 Lincoln Mark LT Typically used for Chevrolet and other Domestic vehicles, not recommended for Ford 4.6, 5.4 and 6.8 Liters. First, the non-original type spark plug can lead to inferior engine performance. 4.6, 5.4 liter engines The flanged insert head positions the insert in the cylinder head and prevents the thread insert from being threaded too far into the cylinder, which could cause damage to the piston or unsatisfactory spark plug performance. 1 is a fragmentary vertical section through a spark plug bore of a cylinder head of an internal combustion engine showing a spark plug installed therein; FIG. The exterior of the guide pilot is cylindrical in nature with the lower portion having a slightly smaller diameter than that of the upper portion. The other complication is that the consumer could become confused from having a mismatched set of spark plugs leading to the installation of a plug that could cause engine damage. A thread insert and method to replace the damaged threads and tapered seat in a spark plug bore of an internal combustion engine allows for the continued use of the original factory specified spark plugs where the original threads in the spark plug bore have been damaged by stripping or cross threading. One current repair method, and the method currently recommended by Ford for the indicated engines, consists of replacing the cylinder head having the damaged spark plug bore with a new cylinder head. M14x1.25 taper seat. Spark plug thread repair for M14x1.25, most commonly used for Chevrolet and other Domestic vehicles that use tapered seat M14x1.25 spark plugs. A kit of tools for repairing a tapered spark plug bore according to, 19. This ensures optimum operation and performance of the engine. The thread insert may be adapted to fit any internal combustion engine using tapered seat spark plugs, and is particularly useful in deep spark plug bores with limited access as found in the aluminum heads in Ford modular engines. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING, Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes, Threaded inserts, e.g. This problem is compounded by the modern trend to construct cylinder heads from aluminum, a relatively soft metal, and from the reduction of the number of threads in spark plug bores. said inner bore having a taper contoured to receive the tapered seat spark plug and adapted to form an airtight seal with the tapered seat of a tapered seat spark plug. The thread insert's inner bore is designed to replace the original threads and tapered seat in the cylinder head. No special tool is needed to position the insert. 3; FIG. 13, a side elevation of a tap used during installation of the thread insert of the invention and included as part of the kit of tools; FIG. It should be realized that the order of some steps is not critical. The thread insert allows the spark plug to be positioned in the spark plug bore to extend to substantially the same depth in the cylinder as it would have in the original bore thus eliminating the debilitating effects of over or under reach spark plugs. The flattened side also prevents the guide pilot from spinning during drilling or tapping. A shorter reach spark plug causes the thread insert's threads to fill with residue allowing the spark plug to easily foul and misfire. The original threaded portion of the spark plug bore will typically consist of eighteen mm threads to match the spark plug threads. The stop pin prevents the bit or tap from damaging the piston by stopping the bit or tap before entering the cylinder too deeply. While various sizes and dimensions will be used as required for particular engines, examples of sizes and dimensions that have been found satisfactory for the engines mentioned will be provided. This also can possibly damage the piston as well. 21 showing the spark plug installed in the spark plug bore. It also helps form an airtight seal between the thread insert and cylinder head. All rights reserved. The collar between the flange and the externally threaded portion of the insert provides a space to catch and collect any bonding agent that may escape around the threads as the insert is screwed into the bore. 19, a fragmentary vertical section similar to that of FIG. The drill bits and taps can be further adapted for use with the guide pilots by installing a stop pin or other similar device onto their shafts. The non-threaded portion and taper is contoured to the same specifications as the original undamaged spark plug bore. Time Sert 4412E-187 Kit Includes the Following. Wrenches, PN 44192 and 44182M different lengths. A thread insert to replace a damaged tapered seat spark plug bore in a cylinder head comprising: an exterior threaded shaft extending from a top end to a distal end; an inner bore having a threaded portion at the distal end to receive the threaded end of a tapered seat spark plug; and. A kit of tools for repairing a tapered spark plug bore according to, 15. 3, a side elevation of a thread insert of the invention; FIG. uses a taper seat 24mm reach spark plug, Ford spark plugs taper seat with a 24mm reach. Can repair failed helicoils up to .660 inches O.D. b) obtaining a guide pilot having an internal bore of a size to closely accept a desired size drill bit therethrough and having a lower portion sized to snugly fit into the upper portion of the spark plug bore to thereby align the guide pilot and internal bore in the spark plug bore; c) positioning the lower portion of the guide pilot in the upper portion of the spark plug bore to align the guide pilot with respect to the bore; d) obtaining a drill bit of desired size to fit in the internal bore of the guide pilot; e) placing the drill bit in the internal bore of the guide pilot; f) attaching a drive means to the drill bit to cause rotation of the drill bit; g) using the guide pilot and the drive means, drilling out the damaged spark plug bore below the guide pilot; h) removing the drill bit and the guide pilot from the bore; i) obtaining a tap of a size for producing threads to mate with threads of the exterior threaded shaft of the thread insert and having a portion to extend through the internal bore of the guide pilot; j) positioning the tap in the guide pilot; k) positioning the lower portion of the guide pilot with the tap extending therefrom in the upper portion of the spark plug bore to align the guide pilot with respect to the bore; l) attaching the drive means to the tap to cause rotation of the tap; m) using the guide pilot and drive means, tapping threads into the drilled out spark plug bore; n) installing a tapered seat spark plug into the thread-insert; o) applying bonding agent to the exterior threads of the thread-insert; and. 1767 Lakewood Ranch Blvd #277, Bradenton, FL 34211, Copyright 2022 Denlors Tools Plus LLC. This is due to the fact that the non-original type plug may not have the same characteristics as the original plug. p/n 4212H However, the prior art thread inserts do not replace the tapered seat. 2009 F-150 pickups, SPARK PLUG REPAIR 2, is similar to FIG. If desired, a small visual scope can be used to inspect the cylinder to make sure that all debris has been removed. 6, a vertical section similar to that of FIG. L4 2.0L ONLY! 21, a fragmentary vertical section similar to that of FIG. (2002 2003 2004) 2.0LL4 The threads of a spark plug bore in a cylinder head can be damaged if the spark plug is over torqued or misaligned during installation or is not tightened sufficiently during installation allowing the spark plug to loosen during use. also info. 22, a fragmentary vertical section similar to that of FIG. The method of installing the thread insert requires that the damaged spark plug bore be drilled and tapped as is well known in the art. You need kit p/n 4412E and insert p/n 44187 use required Sealer p/n 6020. 8 and 9 show a guide pilot, FIG. 1 showing the spark plug bore without a spark plug therein, but with the drill and guide pilot of the invention in place ready to drill out the damaged threads in lower portion of the bore; FIG. Sales Mon-Fri. 7am - 8pm & Sat 9-12PM EST. FIG. This is a particular problem with aluminum heads used in Ford engines, particularly the modular engines such as the V-10 5.4 and 4.6 models. A preferred embodiment of the thread insert of the invention is shown in FIGS. Tooling is long enough for extended reach and can be used for near surface spark plug holes as well using the shorter wrench. A kit of tools for repairing a tapered spark plug bore according to, 17. 2, but showing the alternate thread insert of FIG. In adapting the thread insert, the length of the exterior threaded shaft must be such that it does not extend into the cylinder when inserted. The flattened side abuts against the cylinder head such that the guide pilot is properly aligned over the spark plug bore. 6 and 7 show an alternate embodiment of the thread insert. Thus, the non-threaded portion and taper forms a new tapered seat whereby an airtight seal is created with the spark plug such that it is able to withstand the high pressures of an internal combustion engine. The thread insert has an inner bore configured to reproduce the undamaged tapered seat spark plug bore. Whereas this invention is here illustrated and described with specific reference to embodiments thereof presently contemplated as the best mode of carrying out such invention in actual practice, it is to be understood that various changes may be made in adapting the invention to different embodiments without departing from the broader inventive concepts disclosed herein and comprehended by the claims that follow. Kit includes 3 inserts p/n 44185 (.70") and 44183 (.40") for tapered seat plugs, meaning spark plugs without washers. 7, a fragmentary vertical section similar to that of FIG. 4.6, 5.4 liter engines The original tapered seat plug cannot be used and must now be replaced with a gasket seat spark plug. 14. 16 shows the set up to drill out damaged threads, Whether one or two steps are used in drilling hole. With the thread insert of FIGS. A faulty airtight seal can also allow carbon tracking, the build up of conductive carbon residue on the wall of the spark plug bore orifice caused by the escaping gases. 2008 Ford F-450 What is this CODE? 1. v) removing the guide pilot and drill bit from the bore. d. 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tapered seat spark plug thread repair