Head Bolt Thread Repair

NOTE:

The following procedure is performed using the

TFC8313

3.6L Cyl Head Bolt Thread Repair Kit

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Mark the core drill starting from the bottom edge (2) up to the bottom of the drill stop collar (1) for your total depth of 100 mm.

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All open ports must be taped over (1) to prevent debris from getting into the engine.

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Remove the tape from only the holes (1) in which the drill fixture will be mounted.

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If necessary, remove the cylinder head alignment dowel pins from the engine block.
Place the drill fixture bushing hole (1) over the hole to be repaired and loosely install the bolts.

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Install the drill bushing (1) into the fixture.

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Place the line pin (1) into the drill bushing to pick up hole using minimal down pressure on the line pin. Tighten the drill fixture mounting bolts to 12 NM, then remove the line pin.

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NOTE:
Use of drilling lubricant required.
Using a suitable drill motor and the supplied step drill bit with stop collar (1) properly adjusted to the correct depth, drill the hole until the stop collar touches the top of the drill bushing. Start the drill rotation after the drill is inside of the busing to prevent dulling of the cutting edges. This will require removing the drill and bushing several times to clear the metal chips.

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Thoroughly clean out all chips and debris using a long air nozzle (1) that must reach the bottom of the hole.
NOTE:
Use of tapping lubricant required.

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Tap (1) through the drill bushing until the tap bottoms out. This will require removing the tap and bushing several times to clear metal chips. Clean all of the metal chips and debris using a brake or contact cleaner that will not leave an oily residue.
Use a flashlight to inspect the hole for chips and cleanliness. The hole must be clean and dry.

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Lubricate the threads of the driver tool (2) with Time-Sert™ driver oil J-42385-110 or equivalent, using caution not to get oil onto the outer threads of the insert (1).
Screw an insert (1) onto the driver tool, rotating 2 turns.

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Apply a drop of the supplied sealer (1) on the bottom threads of the insert and screw the insert into the prepared hole. When the head of the insert is seated, the driver will tighten up. Tighten the insert to 12 NM to seat the insert, then remove the insert driver.
Remove tape and thoroughly clean any residue.
NOTE:
When installing the cylinder head, the proper torque sequence and torque MUST be followed in accordance with the service procedures.