TIME-SERT® KITS HAVE BEEN TESTED AND APPROVED BY GENERAL MOTORS.

There is no other company approved for these repairs in aluminum blocks.

USE A "BIG-SERT OVERSIZED" IF THE BLOCK WAS PREVIOUSLY HELICOILED
Click here for video instructions

NOTE: A good thread repair practice is to always verify the hole depths before drilling.
We recommend a "Tap Wrench" for tapping and driver tools.
 

TIME-SERT® GENERAL MOTORS PROFESSIONAL THREAD REPAIR KITS
    


p/n 660J-42385-500

SPECIAL KITS AND TOOLS KIT PART NO INSERT
PART NO
2015
LS9
Head bolt

M12x1.75
M12x1.75 Headbolt

Used in 2014 Corvette 6.2L V8 full-size trucks 4.3L V6, 5.3L V8, or 6.2L V8
Silverado, Sierra, Tahoe, Yukon, Escalade, Suburban
660EN-42385-50

INSTRUCTIONS
661EN-42385-58
includes 10 inserts

Northstar 2004/PV8 LH2
4.6 liter
for XLR
General Motors
Cadillac & others

Northstar head bolt
repair kit

M11x 2.0 Headbolt

In 2004 the NorthStar headbolt has changed to a M11x2.0 thread.

cadillac northstar head gasket
repair kit

 

660J-42385-2030

INSTRUCTIONS

661112030
includes 10 inserts
20 required for the entire block.
Same as GM#
J-42385-507
 

2013
ECOTEC GEN2

2.0 LTG / 2.5 LCV
General Motors
M11x2.0 Headbolt
2.0 LTG
2013 Cadillac ATS
2013 Chevrolet Malibu

2.5 LCV
2013 Cadillac ATS
2013 Chevrolet Malibu
2014 Chevrolet Impala

6609530

INSTRUCTIONS

661112030
includes 10 inserts

NorthStar 2000 V8
General Motors
Cadillac & others

 

Northstar head bolt repair kit

M11x1.5 Headbolt

This block is similar to the early
4.0/4.6 but has two thread depths,
35mm upper bank and 51mm lower bank. This is measured from top of the block to the first starting thread.
 

660J-42385-2000

INSTRUCTIONS
 

66111155
includes 10 inserts
20 required for the entire block.
Same as GM#
J-42385-507
 

Cadillac Northstar
4.0/4.6 V8
First Repair
General Motors
also
Oldsmobile Aurora
1995 -1999
2000 and up use
different kit.
see below
NorthStar M11x 1.5
Headbolt V8


This block has 1 depth
for all head bolt holes.
This is measured from the top of the block to the first starting thread 35mm.
Last year for this block 1999

660J-42385-500

INSTRUCTIONS

66111155
includes 10 inserts
20 required for the entire block.
Same as GM#
J-42385-507

Northstar 4.0/4.6 V8
General Motors

NorthStar M10x1.5
Main Bearing

660J-42385-300
INSTRUCTIONS

661101522

includes 20 inserts
 

Premium V6
 "PV6"
or LX5 3.5L
General Motors

PV6 M11x1.5 Head bolt

1999-2002
Oldsmobile Intrigue

2001-2002
Oldsmobile Aurora
 

6606001

  INSTRUCTIONS

  66111155
includes 16 inserts
16 required for the entire block.
Same as GM#
J-42385-507

 

If Needing oversized for PV6, we do not have a specific kit available.
See our Universal Head Bolt  BIG-SERT M11x1.5
  p/n 6602200BS.  LINK: Universal Head bolt page.

High-Feature
V6
3.0/3.6 liter
General Motors

M11x2.0 Headbolt
Vehicle list click here

  6607330
  INSTRUCTIONS

661112030
includes 16 inserts

GM cast iron block
stripped Starter bolt thread repair kit

Stripped Starter bolt
The depth of the starter bolt hole should be 1.200" inches or 30mm Depth minimum.
 

3/8-16

Gm stripped
starter bolt repair kit

 

Starter Bolt
6601535

Kit includes: Drill, counterbore
tap , tap guide, Driver, 4 inserts 1.00"
 or 25mm
 in length


 
Note: This kit can also repair a failed helicoil or coil style insert.
 
661153501

GM Aluminum block
Starter bolt repair

Starter bolt
The depth of the starter bolt hole should be 1.500" or 38mm Deep

M10x1.5

Starter Bolt
6601380

Kit includes: Core Drill,
tap , tap guide, Driver, 4 inserts 20mm, 4 sleeves


starter bolt thread repair starter bolt stripped repair
 
66110153
BIG BLOCK CHEVY
V8


 

7/16-14
Head bolt

6600761D
Used in cast iron blocks where the material thickness is approx 5/8 or .625 inches




Includes: drill, counterbore, tap, tap guide, driver and 5 stainless inserts .600

 
66107612
BIG BLOCK CHEVY
V8

OVERSIZED
used after helicoil failure
 
7/16-14
Head bolt

Used in cast iron blocks where
the material thickness is approx 5/8 or .625 inches

7/16-14 OverSized Kit

6605761E



includes: drill, counterbore, tap, tap guide, driver, 5 inserts .600 length & sealer.

                                    66157611

Northstar 4.0/4.6 V8
Second Repair
General Motors
Cadillac & others

cadillac northstar head gasket repair

 NorthStar M11x 1.5 Headbolt
 OVERSIZED 
use after helicoil failure

This kit also repairs the
NorthStar 2000 blocks.

660J-42385-500BS
INSTRUCTIONS
includes all the tools
10 inserts 2 dowels

additional dowel
p/n J-42385-508BS
 

661J-42385-507BS

kit includes 10 inserts

BIG-SERT UNIVERSAL HEAD BOLT ADD-ON KIT
ADD-ON KITS ONLY PROVIDE THE NECESSARY TOOLING TO CONVERT TO BIG-SERT
You must have the original kit. What is Included: Drill, Tap, Bushing, line pin, Inserts and dowels.
You will use the driver, fixture plate, bolts from the original kit to finish the repair.

BIG-SERT Universal
ADD- ON KIT
M11x1.5

M11x1.5
Double oversized
ADD-ON
660J-42385-500BSAO
note:
you must have kit p/n 660J-42385-500 or
660J-42385-2000 tooling to finish repair.
661J-42385-507BS
includes 10 inserts
L850 or ECOTEC
2.2 liter

4 cylinder
M11x1.5 Headbolt
Use kit number
660J-42385-500

with 662J-42385-871
Drill Bushing
660J-42385-500 kit with
660J-42385-871 Bushing
66111155
Same as GM#
661J-42385-507

INLINE 6 LL8
General Motors

approx 15mm to
the first thread

Straight 6 M11x2.0
Head bolt

2002 -2004 GMC Envoy

2002-2004 Trail blazer

 

6604001
  INSTRUCTIONS

 
661112030

includes 14 inserts
 

GENERATION III
5.7L V8 LS
General Motors

cadillac northstar head gasket repair

GEN III M11x2.0
Head bolt Repair

1997-2004 C5
Corvette base model


1998-2002 Chevrolet
Camaro Z28, SS


1998-2002 Pontiac Firebird
Formula and Trans-Am


2004 Pontiac GTO

1999-2005 Holden Commodore
as an option


1999-2005 Holden Statesman/Caprice

2001-2005
Holden Monaco
 

660J-42385-100
INSTRUCTIONS

 
661112030

includes 10 inserts
20 required for the entire bloc

GENERATION III 5.7L
V8 LS
General Motors
 

GEN III M10x2.0
Main Bearing

660J-42385-120

661102022

includes 20 inserts

M12x1.75
Drain plug
This kit will repair most GM aluminum drain pans.

Repairs Drain pans in:
1999-2004 CK Engine ASM V8/ LR4/4.8V,LM7/5.3T,LQ4/6.0U
2003-2005 ST1 Engine
ASM-4.3L V6/ LU3/4.3X

Kit contains: Drill, Counter bore, Tap, Driver, Tap guide, 5 inserts 12mm length

 
6601217C
INSTRUCTIONS
 
66112170

Universal
Rocker Arm
M8x1.25 CORE KIT

The core drill included will allow a special 11.7mm
length no flange insert to
be installed deeper
than the standard kit.

M8x1.25
kit includes:
Coredrill, , tap, driver, tap guide, 5 inserts of the 11.7mm no flange.

The mechanic doing the
repair will have to set the counterbore depth
manually by hand
 

6601812CORE



Click here for:
tool information

 
661118125117N

Universal Rocker Arm
M8x1.25 BIG-SERT
OverSized repair

Use after:
A helicoil has failed

The core drill included will
allow a special 11.7mm
length  BIG-SERT
insert to be installed
deeper than the
standard kit.

M8x1.25
kit includes:
Coredrill, , tap, driver, tap guide, 5 inserts of the 11.7mm

The mechanic doing the
repair will have to set the counterbore depth
manually by hand.

6601812CORE-BS

 

 

Click here for:
tool information

 
66158121

Rocker Arm
M10x1.5 CORE KIT

The core drill included
will allow an 11mm
length insert to
be installed deeper
than the standard kit.

M10x1.5
kit includes:
Coredrill,  tap, driver, tap guide, 5 inserts of the
11mm length

The mechanic doing the
repair will have to set the counterbore depth
manually by hand

 
6601015CORE



Click here for:
tool information

 
661118125117N