TIME-SERT® GENERAL MOTORS PROFESSIONAL THREAD REPAIR KITS
NORTHSTAR HEAD BOLT REPAIR KIT

 
                                                       

  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 KIT" IF THE BLOCK WAS PREVIOUSLY HELICOILED
 

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.
 

SPECIAL KITS AND TOOLS

KIT PART NO.

PRICE

INSERT
        PART NO.

PRICE

2015
LS9 Headbolt
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

505.11

661EN-42385-58
M12x1.75x35


includes 10 inserts

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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

449.19

661112030

includes 10 inserts

3.94

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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  M11x1.5
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

Northstar
Headbolt
repair kit

INSTRUCTIONS

445.81

66111155

includes 10
inserts
20 required
for the entire
block.
Same as GM#
J-42385-507
3.67

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

NorthStar
2000 V8

General Motors
Cadillac & others
2000 - 2003

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.

Northstar 2000
660J-42385-2000

INSTRUCTIONS
 

445.81

66111155
M11-1.5x30


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

3.67

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

NorthStar
2004 PV8  LH2

4.6 liter for XLR
General Motors
Cadillac & others

Northstar head bolt
repair kit

M11x2.0 Headbolt

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

cadillac northstar head gasket repair kit
 

660J-42385-2030

INSTRUCTIONS
 

445.81

661112030

includes 10
inserts
20 required
for the entire
block.

3.94

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

Premium V6
"PV6"
or LX5 3.5L
General Motors

PV6 M11x1.5 Head bolt

1999-2002
Oldsmobile Intrigue

2001-2002
Oldsmobile Aurora
 
  6606001

 
INSTRUCTIONS
445.81  66111155

includes 16 inserts
16 required for the entire block.
Same as GM#
J-42385-507
3.67

If Needing oversized for PV6, we do not have a specific kit available.
See our Universal Head Bolt  BIG-SERT M11x1.5 

 

The 4.5 or 4.9 liter should be M12x1.75.  We do not make a specific kit for this engine block but we do offer a Universal kit M12x1.75
p/n 6604900.      
LINK: Universal Head bolt page.
 

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

High-Feature
V6
3.0/3.6 liter
General Motors
M11x2.0 Head bolt
Vehicle List
Click Here
6607330
INSTRUCTIONS
449.19 661112030
includes
16 inserts
3.94

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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
6601535
Starter Bolt
 

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
129.28 661153501

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

GM Aluminum block
Starter bolt repair


Starter bolt
The depth of the starter bolt hole should be 1.500" or 38mm Deep
M10x1.5 6601380

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

173.12 66110153 1.66

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

BIG BLOCK CHEVY
V8

gm cast iron block thread repair kit head bolt gm cast iron thread repair

7/16-14
Head bolt

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

6600761D

includes: drill, counterbore, tap, tap guide, driver and
 5 stainless inserts .600
125.14 66107612 3.67

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

BIG BLOCK CHEVY
V8

OVERSIZED
used after
helicoil failure
7/16-14
Headbolt
Oversized

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
130.42 66157611 7.32

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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
485.24 661J-42385-507BS
kit includes 10 inserts
7.39
  additional dowel
p/n 662J-42385-508BS
 
13.68

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
 

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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.
 
320.40 661J-42385-507BS
includes 10 inserts
7.39

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

L850 or ECOTEC
2.2 liter
4 cylinder
M11 x 1.5 Headbolt

 Use Kit
660J-42385-500 kit with
662J-42385-871 with Drill Bushing

660J-42385-500 kit with
662J-42385-871 with Drill Bushing
445.81 66111155
Same as
GM #
J-42385-507
3.67

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

IN-LINE 6 LL8
General Motors

approx 15mm to the first thread.
Straight 6
M11 x 2.0
Head bolt

2002 -2004 GMC Envoy
2002-2004 Trail blazer
 
6604001
INSTRUCTIONS
445.81 661112030
includes 14 inserts
3.94

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

GENERATION III
5.7L V8 LS

General Motors

cadillac northstar head gasket repair


 

 

GEN III M11 x 2.0
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
506.48 661112030

includes 10 inserts
20 required for the
entire block
3.94

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

Northstar 4.0/4.6 V8
General Motors

NorthStar M10 x 1.5
Main Bearing
 
660J-42385-300

INSTRUCTIONS
397.30 661101522

includes 20 inserts
1.90

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

GENERATION III 5.7L
V8 LS
General Motors
 

GEN III M10 x 2.0
Main Bearing
 
660J-42385-120

INSTRUCTIONS
397.30 661102022

includes 20 inserts
3.00

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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, Cbore,Tap, Driver, Tapguide,
5 inserts 12mm length
 
6601217C

INSTRUCTIONS
114.49 66112170 2.14

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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.

M8 x 1.25
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

116.76 66118125117N

1.58

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

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.

 
 

M8 x 1.25
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
173.12 66158121 6.62

SPECIAL KITS AND TOOLS

PRICE

INSERT
PART NO.

PRICE

Rocker Arm
M10x1.5
Core Kit


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

depth manually by hand.
 
  M10 x 1.5
kit includes:
Coredrill, tap, driver,
tap guide,
inserts of the 11mm
length

The mechanic doing the repair
will have to set the counterbore

6601015CORE


 

Click here for:
tool information

 

151.64 661101511

1.66