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Big-Sert Thread Repair Inserts & Kits for Oversize Repair

Time-Sert makes the Big-Sert thickwalled thread insert range for when a second stage thread repair is needed retreads that have been repaired once using a helical coil or Time-Sert thread insert and the first repair has faled See below for size

BIG-SERT® OVERSIZED REPAIRS

NOTE: BOTTOM FEW INTERNAL THREADS ARE INCOMPLETE THE INSERT DRIVER (ROLL FORM TAP) SEATS THE INSERTAND COMPLETES THE BOTTOM THREADS. THIS PUSHES THE PIN OUT TO CONTACT THE THREADED HOLE, BACK OUT OF THE INSERT IS PREVENTED BY THE CAM LOCK EFFECT OF THE PIN
BIG-SERT® IS A HEAVY WALL SOLID BUSHING. EASY TO INSTALL WITH POSITIVE PLACEMENT.
BIG-SERT®
GIVES INCREASED LOAD PROTECTION FOR CRITICAL USE.BIG-SERT WILL REPAIR OVERSIZE HOLES WHICH HAVE BEEN REPAIRED.
BIG-SERT®
WILL REPAIR OVERSIZE HOLES WHICH HAVE BEEN REPAIRED.
KIT CONTENTS DRILL
COUNTERBORE TAP INSERT DRIVER FIVE (5) STEEL INSERTS
Return to Main Index for All Products
Return to Click here for how to measure a threadMain Index for All Products

ENGINEERING DATA

INCH

METRIC

KITS AND INSERTS

INCH

METRIC

BIG-SERT SPARK PLUG M14X1.25

M14x1.25 Spark Plug Repair Kits & InsertsRepair Oversized holes as large as .660 inches or 16.8mm

WASHER SEAT

ALUMINIUM WASHER SEAT INSERT

TAPER SEAT

ALUMINIUM TAPER SEAT INSERT

E: Hold the wrench, and in a counter-clockwise rotation, untighten the cap screw with the allen key provided, This will allow the setting tool to release itself from the insert.

BIG-SERT SPARK PLUG REPAIR

The following instructions are for kits 51415 and 5141E

Stop: Check that the valves are not open!
The only 100% way to know the valves are not open is to remove the valve cover and inspect the cam, making sure that it is not depressing the valves on the damaged spark plug hole. Not recommended for holes larger than .660 inches or 16.8mm

An optional way to check that the valves are closed,this is a 2 man job
Have someone turn the engine over by hand with an 18mm socket from the front of the engine. Turn the engine over until it is going up on the Compression Stroke. Place your thumb at the top of the spark plug hole at the same time to block off the air. When you feel the engine compression stop pushing air against your thumb the piston will be top dead center. Turn the engine a little more to be going down on the Power stroke, both valves should be closed at this point, and the piston should be all the way down

1) Place the Reamer into the square of the wrench and tighten the set screw to secure the reamer in place. Picture A:

Ream the hole picture B: until lack Stap olar”touches the head.

This will create the 45 degree countersink seen in picture C:

2)Tap the hole.
Tap the hole with the wrench provided There is a pilot at the front of the tap to help guide it straight into the hole.Use contact or brake cleaner to thoroughly
clean out any remaining chips and oil.Continue instructions next page

Mechanies Tip 1:
Packing the Aunties with grease will help tocatch any stray chip from goinginto the cylinder.
Mechanies Tip 2:
Using a shop-vac with a thin hose taped to the nozzle is helpful for removing any remaining chips in the cylinder.
3) Setting tool.
A: Screw the setting tool into the insert.
B: Then lightly tighten the socket cap screw,Setting tool Note:Remove collar for Triton and Ztechstyle inserts! PN 51459 PN 51460

C: Using the wrench provided
place the setting tool into the wrench.

D: Place Loctite around the middle of the insert and into the clean prepared hole.
E: Hold the wrench, and in a counter-clockwise rotation, untighten the cap screw with the allen key provided, This will allow the setting tool to release itself from the insert.

F: You can now unscrew the setting tool from
the insert.

4) Install driver tool
Using the wrench provided, place the driver tool into the square and tighten the set screws to secure the driver in place. Oil the bottom threads of the install driver with a few drops of driver oil or 30 wt motor oil.
Screw the driver into the insert. The driver will cold roll the last few threads of the insert. While screwing the driver into the insert you will feel the driver start to tighten up, with a little more power continue through the insert until it loosens up. Remove driver, repair is complete.

UNIVERSAL BIG-SERT HEAD BOLT KITS

Normally used when a Helicoil or coil style insert has failed. BIG-SERT Universal head bolt kits can be used in any application of bolt size listed below. A simple tool setup is all that is required.
GEN3
Universal M10x1.25 head bolt KRN NASOS Insert Part No S0125 Includes 10 inserts of a MO1.28.25mm length
Universal M10x1.5 head bolt Kit Part No SOS Insert Past Na SOS Includes 10 inserts of a M10x1.5×24.5mm length
Universal MIlx2.0 head bolt Kit Part No.3700BS Insert Part 37004 Includes 10 inserts of a M 20x30mm length
Universal MIlx2.0 head bolt Kit Part No.3700BS Insert Part 37004 Includes 10 inserts of a M 20x30mm length
Universal MIlx2.0 head bolt Kit Part No.3700BS Insert Part 37004 Includes 10 inserts of a M 20x30mm length
Universal M12x1.25 head bolt Kit Part No.4700BS Insert Part No. 52125 Includes 10 inserts of a M12x1.25x30mm length
Universal M12x1.5 head bolt Kit Part No.4800BS Insert Part No. 52155 Includes 10 inserts of a M12x1.5x30mm length
Universal M12x1.75 head bolt Kit Part No.4900BS Insert Part No. 52175 Includes 10 inserts of a M12x1.75x30mm length

TAP GUIDES

Tap Guides are used with Standard Big-Sert kits

The lower portion of the tap guide should remain as squaremas possible to the engine surface. Turn the tap slowly while making sure the guide remains flush.

Tap guide ensure that the threads are square to the surface of the hole.
INCH TAP GUIDES
METRIC TAP GUIDES

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