: Is there a GM TSB for the use of Time-Serts?

01-15-04, 07:31 PM
Is anyone aware of a GM TSB for using Time-Sert aluminum bolts when replacing the gaskets for the cylinder heads?

I need this information to support a Warranty Claim for my car.

The service manager at the dealer believes that there is a GM TSB that recommends the use of Time-Serts in this situation. Unfortunately, the dealership has NOT been able to find a GM TSB that documents this recommendation.

I would appreciate any help and assistance in tracking down this GM TSB. Any information would be greatly appreciated.


01-16-04, 02:07 PM
There is no service bulletin per se...the use of the Time-Serts to repair Northstar cylinder head bolt holes has been the standard service procedure since the engine went into production in 1993 model year.....The procedure for timeserts was outlined in the 1993 service manual. The specialty timesert inserts were developed and released before the engine ever went into production as the prescribed method of repairing the bolt holes . This is standard procedure for a repair.

What model year are you talking about??

The service manager should have the resources to find any service bulletins for any Cadillac ever. For him to "not know" should tell you something....

01-18-04, 10:03 AM
It is a 1996 Oldsmobile Aurora with the 4.0L Northstar engine.

The dealer is Curran Cadillac in Wesport, CT. I purchase the car from this dealership and I have been very please with their Service Department.

I have an after-market warranty from WarrantybyNet. The warranty company is questioning the use of the Time-Serts when replacing the gaskets for the cylinder heads.

The Warranty Company advised me that they will pay for the use of the Time-Sert bolts if I can show them the GM TSBs that recommend their use.

01-18-04, 02:26 PM
On the '96....theres a sort of 'infomation' bulletin....

Info - Enhanced Aluminum Engine Component Thread Repair Process #00-06-01-016
Enhanced Aluminum Engine Component Thread Repair Process
1993 Cadillac Allante

1993-2001 Cadillac Eldorado, Seville

1994-1999 Cadillac DeVille Concours

1996-2001 Cadillac DeVille

2000-2001 Cadillac DeVille Touring

1997-2001 Chevrolet Corvette

1998-2001 Chevrolet Camaro

1995-2001 Oldsmobile Aurora (V8)

1999-2001 Oldsmobile Intrigue

2001 Oldsmobile Aurora (V6)

1998-2001 Pontiac Firebird

with 2.2 L, 3.5 L, 4.0 L, 4.6 L or 5.7 L Engine (VINs F, H, C, 9, Y, G, S -- RPOs L61, LX5, L47, L37, LD8, LS1, LS6)

An enhanced thread repair process has been developed for use on General Motors aluminum engine components for the above listed engines. The thread repair kits used for this process represent a significant advancement in aluminum component thread repair, providing consistently repeatable high quality repairs which, when properly performed, will meet or exceed the original specifications. This enhanced thread repair process can, and should, be used to repair aluminum engine components, instead of complete engine replacement, whenever possible. Kent-Moore has distributed these thread repair kits to General Motors dealerships as part of their essential tool packages. The J 43965 Thread Repair Extension Kit has proven to be invaluable in the repair of difficult to access thread repair locations. Listed below are the Engine VINs / RPOs and the applicable Kent-Moore essential tool thread repair kits.

Engine VIN / Engine RPO
Kent-Moore Thread Repair Kit Number

J 42385-100 Main Cap/Head Bolt Kit

J 42385-200 General Thread Repair Kit

J 42385-300 Fixture and Hardware Kit

VIN 9, Y, C / RPO L37, LD8, L47
J 42385-500 Main Cap/Head Bolt Kit

J 42385-2000 Thread Repair Kit

J 42385-600 Thread Repair Kit

J 42385-625 Thread Repair Kit

J 42385-650 Thread Repair Kit

J 42385-675 Complete Thread Repair Kit

J 42385-675 Contains the contents of 600, 625 and 650 Thread Repair Kits)

J 42385-850 Thread Repair Kit

J 43965 Thread Repair Extension Kit

Consult the appropriate applicable GM Service Manual or Kent-Moore thread repair kit for complete detailed instructions on the proper use of the above thread repair kits.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Labor Time

Engine Assembly Thread Repair
0.1-0.3 hr

This Thread Repair Labor Operation can only be used in conjunction with other component Labor Operation numbers.

Maybe asked the insurance company if they would be willing to pull out and dismantle the engine again...in a few months if the block threads do pull out.