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Subject: Info - FWD RTV Sealant Procedure with Current Oil Distribution Plate #03-06-01-027 - (10/06/2003)

Models: 1993 Cadillac Allante

1993-2002 Cadillac Eldorado

1993-2004 Cadillac DeVille, Seville

2004 Pontiac Bonneville G/XP




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This bulletin is being issued to inform dealers of enhancements to crankcase, oil distribution plate and oil pan sealing by using RTV sealant in the procedure below.

Important: For detailed component and engine removal information, refer to Engine Replacement Procedure in the Engine Mechanical subsection of the appropriate Service Manual or SI.

  1. Drain the engine coolant and engine oil from the engine.
  2. Remove the powertrain from the vehicle.
  3. Remove the drive belt.
  4. Remove the A/C compressor and set it aside.
  5. Remove the power steering pump and set it aside.
  6. Remove the engine from the transmission.
  7. Install the engine on an engine stand.
  8. Remove the components necessary to remove the oil pan and lower crankcase, including but not limited to the following:
    • Generator
    • Oil filter adapter
    • Crankshaft balancer
    • Engine front cover
    • Engine front cover gasket
    • Oil pump
    • Lower crankshaft sensor
  9. Rotate the engine stand with the oil pan facing up.

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  10. Remove the oil pan bolts.

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  11. Remove the oil pan.

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  12. Remove the gasket from the oil pan.

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  13. Remove the oil suction tube bolt and nut.
  14. Remove the oil suction tube.

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  15. Remove the main bearing bolts.
  16. Remove the crankshaft oil scraper plate.

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  17. Remove the oil distribution plate bolts.

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  18. Remove the oil distribution plate.

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  19. Remove the crankcase perimeter bolts on the right side.

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  20. Remove the crankcase perimeter bolts on the left side.

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  21. Remove the lower crankcase by prying at the designated pry points.



 

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Discussion Starter #2
22. Remove the lower crankcase.

11.gif

23. Remove the upper-to-lower crankcase seals.
24. Using a suitable scraper, clean the anaerobic sealant from the rail surfaces of the block.
25. Using a suitable cleaning tool, clean out the anaerobic sealant from the engine block seal groove in the rail of the block.
26. Using a suitable cleaning solvent, clean the anaerobic sealant from the rail surfaces of the block.
27. Using a suitable scraper, clean the anaerobic sealant from the rail surfaces of the lower crankcase.
28. Using a suitable cleaning solvent, clean the anaerobic sealant from the rail surfaces of the lower crankcase.
29. Ensure the surfaces to be sealed are free of anaerobic sealant and free of any nicks, gouges or scratches. Repair or replace components as necessary.
30. Inspect all components removed for serviceability. Repair or replace components as necessary.

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31. Place a 5 mm (0.197 in) spot of RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or equivalent, at the two points where the crankshaft rear oil seal meets the split line of the engine block.

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32. Completely fill and slightly overfill the engine block seal groove with a continuous bead of RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent.
33. Ensure the RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent, bead is higher than the rail surface by 3 mm (0.118 in).

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34. Using a suitable tool, spread the sealant in the area near the oil drain back passages away from the oil drain back passages and towards the outboard edge of the rail surface.

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35. To prevent shifting of the lower crankcase, install one of the EN 46109 tools into a bolt hole in each rail.

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36. Install the cleaned lower crankcase onto the engine.

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37. Using a rubber mallet, gently tap the lower crankcase into position.
38. Remove both EN 46109 tools.

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39. Loosely install the crankcase perimeter bolts on the right side.

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40. Loosely install the crankcase perimeter bolts on the left side.

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Discussion Starter #3
21.gif
41. Using a small long blade screwdriver, clean out any sealant in the oil drain back passages.

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42. Using a NEW oil distribution plate, plate a 3 mm (0.118 in) wide bead (1) of RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent, around the perimeter of the outer seal of the oil distribution plate place.
43. Ensure the RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent, bead is inboard of all the oil pan bolt holes.

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44. To prevent shifting of the oil distribution plate, install one of the EN 46109 tools into a bolt hole in each side of the lower crankcase.

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45. Install the NEW oil distribution plate.
46. Remove both of the EN 46109 tools.


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47. Install the oil distribution plate bolts.
Tighten
Tighten the oil distribution plate bolts to 10 N·m (89 lb in).


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48. Using a small long blade screwdriver, clean out any sealant in the oil drain back passages.

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49. Install the crankshaft oil scraper plate.
50. Install the main bearing bolts. Ensure the stud-head bolts used for the oil suction tube support bracket are placed in the proper position.

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51. Tighten the main bearing bolts in the proper sequence.
51.1. First pass:

Tighten
Tighten the main bearing bolts (1 through 20) to 20 N·m (15 lb ft) in proper sequence.

51.2. Final pass:

Tighten
Tighten the main bearing bolts (1 through 20) an additional 65 degrees in proper sequence using the J 45059.


29.gif


52. Tighten the crankcase perimeter bolts in the sequence shown.
Tighten
Tighten the crankcase perimeter bolts to 30 N·m (22 lb ft).

30.gif
 

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Discussion Starter #4
53. Using a small long bladed screwdriver, verify that the oil drain back passages are clear of sealant.

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54. Lubricate the silicone seal in the oil distribution plate. With a twisting motion, install the end of the oil suction tube (2).
55. Install the oil suction tube retaining bolt (1) and nut (3).
Tighten

• Tighten the oil suction tube support bracket nut to 24 N·m (18 lb ft).

• Tighten the oil suction tube bolt to 10 N·m (89 lb in).

56. Using a suitable cleaning solvent, clean the sealing surfaces and seal groove of the oil pan.
57. Using a suitable cleaning solvent, clean the sealing surfaces of the oil distribution plate.

32.gif

58. Completely fill and slightly overfill the oil pan seal groove with a continuous bead of RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent.
59. Ensure the RTV sealant, P/N 12378521 (in Canada, use P/N 88901148) or the equivalent, bead is higher than the oil pan sealing surface by 3 mm (0.118 in).

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60. To prevent shifting of the oil pan, install one of the EN 46109 tools into a bolt hole in each side of the lower crankcase.

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61. Position the oil pan onto the lower crankcase.
62. Remove both EN 46109 tools.

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63. Install the oil pan bolts.

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64. Tighten the oil pan bolts in the sequence shown.
Tighten
Tighten the oil pan bolts in sequence to 10 N·m (89 lb in).

65. Clean off any sealant that has protruded to the exterior of the engine.
Important: For detailed component and engine installation, refer to Engine Replacement Procedure in the Engine Mechanical subsection of the appropriate Service Manual or SI.

66. Install the components removed.
67. Remove the engine from the engine stand.
68. Install the engine to the transmission.
69. Install a NEW oil filter.
70. Install the power steering pump.
71. Install the A/C compressor.
72. Install the drive belt.
73. Install the powertrain into the vehicle.
74. Refill the engine coolant and the engine oil.
 

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Discussion Starter #5 (Edited)
This was the initial information given to us in 2001. They called it TRI-BOND or TRI-BOND Epoxy


RTV silicone sealant is used due to its ability to withstand GM Powertrain’s most grueling sealing tests.

You must use GM #12478521, not a substitute RTV.

This required sealant comes in a caulk gun applicator with a pre-cut 3 mm metered nozzle.

The cartridge contains 150 grams of sealant.

Don’t try to save left over sealant; throw the cartridge away and use a fresh one for each job.

Plan to work quickly once you’ve opened the applicator; you should have the component in place within 10 minutes .
 

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Discussion Starter #6
Service Information Update on Consolidating the Use of GM Liquid Gasket/Engine Sealants and the New Sealant Dispenser GE-48326 Essential Tool #05-06-01-010A - (04/16/2007)

In 2005 General Motors consolidated the use of all liquid gaskets/engine sealants. At that time, two sealants replaced all previous sealants referred to in Service Information (SI) and/or the Service Manual.

In 2007, GM has consolidated to one engine sealant already available in a 150 g cartridge and now in a 75 g aluminum tube. As a result, P/N 12346141, 54 g tube, has been deleted from service.

One of these, engine sealant P/N 12378521 (U.S.) and P/N 88901148 (Canada), was released in a cartridge to be used in a conventional caulking gun. The cartridge and conventional caulking gun proved to be too large and cumbersome in certain instances when used in on-vehicle service.

To address this concern, GM Powertrain Engineering released the engine sealant in a 0.075 kg (75 gram) squeeze tube (packaged six to the carton, with nozzles) along with a new essential service tool, Sealant Dispenser GE-48326, which has been shipped to all GM dealerships.

Sealant Guidelines
The GM Powertrain engineering specification for applying this sealant is an even bead, 3 mm (0.118 in) in diameter. Due to the high viscosity of the sealant, a dispenser is required to meet this specification. The GE-48326 Sealant Dispenser provides the ability to apply the sealant to specification using one hand, even in areas not accessible using the P/N 12378521 Engine Sealant cartridge and caulking gun.

This solitary engine sealant available in tubes and small cartridge is compatible with all synthetic, synthetic blends and mineral oils, as well as all engine coolants including DEX-COOL®. The maximum working time of this sealant is 20 minutes. The sealant will be fully cured in 24 hours. The assembly may be filled with oil or coolant immediately after applying the sealant and tightening the bolts.

Engine Sealant Part Numbers

88861417 (U.S.) Engine Sealant 0.075 kg (75 gram) Squeeze Tube
.
12378521 (U.S.) Engine Sealant 0.15 kg (150 gram) Cartridge
 

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Discussion Starter #7
Wait until you see the last part of this. :histeric:
:hmm:
later
 

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Isn't it against GM's policy to post TSB's for the public?
 

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I keep blathering on and on about this...........Alldatadiy.com (subscription) has all the TSB's posted for your vehicle/year/engine VIN code. (and I don't get a kickback: I paid my $39.95/3 years just as everyone else.)
 

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Discussion Starter #10
Isn't it against GM's policy to post TSB's for the public?
NO
How does alldata get them?
It is a federal law that they can not be with held.
They used to come mailed to me at home before they stopped publishing them and went all electronic.
 

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I keep blathering on and on about this...........Alldatadiy.com (subscription) has all the TSB's posted for your vehicle/year/engine VIN code. (and I don't get a kickback: I paid my $39.95/3 years just as everyone else.)
They do not list PI's
 

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Discussion Starter #12

The highlighted hole is the oil drainback for the rear main seal. If it is not cleared out it will blow out the rear main seal
 

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Discussion Starter #13 (Edited)
Crankshaft Rear Oil Seal Installation
Tools Required
  • • EN-48072 Sealant Applicator
  • • J 45930-A Crankshaft Rear Oil Seal Installer
Important: The EN-48072 must be used to ensure even application of the sealant in the bore and to prevent blockage of the drain back hole.

Important: Ensure components that are being sealed with RTV sealant are assembled within 20 minutes. Components assembled after the RTV sealant has skinned-over, approximately 20 minutes, will not bond properly.

Important: Although originally equipped with a lip-style crankshaft rear oil seal, engines built from March 1, 1996 and thru 1999 should use the cassette-style crankshaft rear oil seal.



1. Ensure the engine block where the crankshaft rear oil seal is installed is a deep bore (1).
  • A deep bore of approximately 15 mm (0.5906 in) was used on engines from March 1, 1996 and later.
  • A shallow bore of approximately 8 mm (0.3150 in) was used on engines from 1993 thru February 29, 1996. This block would use a lip-style crankshaft rear oil seal and the J 38817-A for installation.


2. Inspect the engine block bore (1) and the crankshaft flange (2) for the damage. Repair or replace any damaged components.



3. Ensure the oil drain-back hole (1) is clear of debris using a wire or an unbound plastic tie wrap (2).



Important: In order to ensure proper bonding of the sealant the bore must be clean and dry.

4. Clean the bore in the block with cleaner solvent GM P/N 12378392 or 12346139 (Canadian P/N 88901247).



Important: Northstar engines 2005 and older have an 8 x 1.25 mm flywheel/flexplate crankshaft bolt hole thread. Northstar engines 2006 and later have an 11 x 1.5 mm flywheel/flexplate crankshaft bolt hole thread.

5. Remove the proper sized bolts from the J 45930-A . Use the bolts (2) 8 mm or the bolts (3) 11 mm.



6. Install the EN-48072 pilot base onto the crankshaft. The hub on the crankshaft will fit into the recess on the inboard side of the EN-48072 pilot base.



Important: Northstar engines 2005 and older have an 8 x 1.25 mm flywheel/flexplate crankshaft bolt hole thread. Northstar engines 2006 and later have an 11 x 1.5 mm flywheel/flexplate crankshaft bolt hole thread.

7. Use the proper bolts from the J 45930-A to retain the EN-48072 pilot base in place.



8. Install the EN-48072 applicator housing over the EN-48072 pilot base. Ensure the EN-48072 applicator housing bottoms in the bore of the block



Important: The sealant must not block the drain back hole. Blockage of the drain back hole can lead to oil leakage.


9. Apply the sealant GM P/N 12378521 (Canadian P/N 88901148) to the bore outer diameter in the block. Ensure the sealant does not block the drain hole.



Important: Apply steady even pressure to the EN-48072 applicator housing.

10. Using a suitable tool spread the sealant within the bore to ensure an even coating across the bore.



Important: In order to apply an even coat of the sealant do not twist or turn the EN-48072 applicator housing as it is pulled away from the bottom of the bore.


11. Using both hands, slowly and evenly, pull the EN-48072 applicator housing out of the bore and remove it from the EN-48072 pilot base.



12. Remove the J 45930-A bolts from the EN-48072 pilot base.



13. Remove the EN-48072 pilot base.

 

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Discussion Starter #14 (Edited)
Crankshaft Rear Oil Seal Installation continued


14. Ensure that the sealant (1) is evenly spread across the bore of the block.



15. Ensure the drain back hole (1) is clear of the sealant.


Notice: The cassette seal is installed onto the crankshaft with a press fit that requires over 135 Nm (100 lb ft) of force to remove or install. This high force requires the use of special tools to remove and install the seal. Use of any other tools during removal or installation can lead to damage to the seal or other components. An improperly installed or damaged seal can leak oil and can lead to engine damage. Use of the J 38817-A to install the cassette seal can damage the tool and cause improper seal installation and/or seal damage.

Important: Beginning with the model year 2006 the flywheel/flexplate crankshaft bolt hole thread was changed from 8 x 1.25 mm to 11 x 1.5 mm. The J 45930-A will service the cassette seals installed on engines from March 1, 1996 to 2006. If a J 45930 is to be used on a 2006 or later engine the update kit, J 45930-10, must be used to convert the J 45930 to a J 45930-A .

Important: Crankshaft rear oil seal and engine flywheel installation requires adequate space for installation. If the engine stand does not allow suitable space to use the J 45930-A install the crankshaft rear oil seal and engine flywheel with the engine properly supported on the floor or on a bench.



16. Ensure the proper size of bolt (2) 8 mm or (3) 11 mm is being installed in the J 45930-A .



17. Turn the center nut (1) of the J 45930-A until the center hub (2) protrudes approximately 15 mm (0.591 in) beyond the outer plate (3).



Important: DO NOT use any lubricant in order to install the crankshaft rear oil seal. Do not use any lubricant on the coating pre-applied to the inner diameter of the crankshaft rear oil seal. The coating is a sealant that must not be contaminated. Do not use any lubricant on the outer diameter of the crankshaft rear oil seal. The sealant applied to the bore of the engine block will not properly bond to a lubricated crankshaft rear oil seal.

18. Do not lubricate any part of the new cassette style crankshaft rear oil seal.



19. Install the new cassette style crankshaft rear oil seal onto the center hub of the J 45930-A .



20. Thread the two J 45930-A mounting bolts into the crankshaft flywheel bolt holes.



21. Tighten the two mounting bolts until the J 45930-A is firmly mounted on the crankshaft.



22. Install the new cassette style crankshaft rear oil seal by turning the nut of the J 45930-A until the drive portion of the J 45930-A bottoms against the crankcase.



23. Loosen the center nut to release pressure on the crankcase.



24. Loosen the two mounting bolts.



25. Remove the J 45930-A from the crankshaft.
26. Wipe off any excessive sealant from the block.



27. Ensure the new cassette style crankshaft rear oil seal is installed properly.
  • The outer surface of the seal (3) should be 0.500-0.800 mm (0.0197-0.0315 in) (1) below the surface of the engine block (2).
  • The inner surface of the sleeve (6) should be 0.400-0.900 mm (0.0158-0.0354 in) (4) below the surface of the outer surface of the seal (5).
  • The installed seal and sleeve need to be parallel to the block by 0.000-0.500 mm (0.000-0.0197 in).
28. Clean all tools to remove any residual sealant.
 

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Discussion Starter #15

The highlighted hole is the oil drainback for the rear main seal. If it is not cleared out it will blow out the rear main seal





:thumbsup:

This can become restricted during a case half reseal. TSB #03-06-01-027
 

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Discussion Starter #16
I got the pictures resized and back in place.:D
 

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Discussion Starter #17 (Edited)
I need to post picture of the TriBond sealer. Yes it is an epoxy type of sealer. 99% success rate.

This sealer started out it's life on the 2002 Trailblazer 4.2L inline 6. This had a 10 minute set time. it is now up to a 20 minute set time. On the 4.2L and other engines since GM has tools to align the parts that are being assembled.

Example: The oil pan on the 4.2L. The block and the oil pan both bolt to the one piece bell-housing. If the oil pan was set on the block without the alignment tool it could be offset. I am talking a very small amount. I will use a large figure of 1mm in this example. The engine gets installed you tighten the bell-housing and it could either crack the bell-housing or fracture the sealer.:hmm: Yes this stuff sets up that hard. The sealer beaks when you separate it.

Example: On the 3.6L V6 GM has threaded jack bolt holes in the front cover to get the cover to break free of the block when you are removing it. It is almost impossible to get that cover to break free if you don't use the jack bolts.
 

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Discussion Starter #18
Tribond sealer. It is very thick.




 

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I know this is an old thread but, I just took my '98 N* apart (head gasket job). The "conversion Gasket" set from Fram contains seals for the block to case half. Do you use RTV and the seal? Also, there was no sealant on the rear main seal I removed. Why is it required for replacement? The center is pressed on the crankshaft and the OD rotates relative to the block so any sealant would be wiped off. Do the new Fram seals eliminate the need for sealant?
 
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