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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #1  
Old 07-30-2009, 08:52 PM
sgoodhope sgoodhope is offline
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Join Date: Jul 2009
Location: Central Alta Canada
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Default Need to know the best way to remove the oil pan?

Hello, new guy here, I need to know the best way to remove the oil pan. Is it buy taking the motor out? Or dropping the front end? Let me know. You can contact me at sgoodhope@hotmail.com
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  #2  
Old 07-31-2009, 10:40 AM
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More Power More Power is offline
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The stamped-steel pan comes off pretty easily, but the aluminum crankcase is a bit more work - in the truck. If you expect to do more work (i.e. remove connecting rods, oil pump etc.), removing the engine might be a better option.

Jim
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  #3  
Old 07-31-2009, 08:38 PM
sgoodhope sgoodhope is offline
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Location: Central Alta Canada
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Default One big headach

Hello again, I now have the trans pulled away from the block. Just getting ready to go and drop the 2 bolts holding the upper pan in place. I guess I will just have to figure it out along the way. Replys are slow and not very forth coming. One thing that would be nice to know is what is the torque spec on the piston rod bolts. I will post again after the job is done to let everyone know how it went.
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  #4  
Old 07-31-2009, 10:40 PM
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Duramaster Duramaster is offline
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What are you doing? Inspecting or replacing? Bearings usually aren't a problem on the DMAX engine. I personally have seen LB7 engines go 300K.

Anyway, torque specs for the LB7 is::

Well........... sorry, I just tried to look up the specs on the GM SI website. The website is currently down? I will try again later for you.
__________________
1998 Chevy k-2500 454 147,000 miles and climbing!

1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!
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  #5  
Old 07-31-2009, 11:30 PM
sgoodhope sgoodhope is offline
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Location: Central Alta Canada
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Default Bad injector leads to # 3 cylinder melt down

My injectors started to go. I took it to GM. They ran there diagnostics and found that the right bank was running a return rate of 61ml and the left was 42ml. They replaced the injectors and buttoned it back up. When running the truck for the first time they noticed a miss. Pulled the glow plugs and did a compression test. All cylinders were at 390f/lb except # 3. It was dead. They called me up and said do you have 5000.00 so we can fix your truck? I said I will do it myself. Right now I just have a fuel line to remove and a few motor mount bolts and the motor will be out of the truck by noon. I already took the head off and it has been repaired with a new valve seat and valve pluse a 2thou decking to make sure it seats on the head gasket the first time. Now I have to pull the piston and replace it. It is toast. Luckly there was little to no damage to the cylinder it self a light hone should do the trick. Once I have it back together I will run a compression test on it before I install the glow plugs to make sure I have good pressure on # 3.
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  #6  
Old 08-01-2009, 01:39 PM
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Duramaster Duramaster is offline
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Well then you need LOTS OF TORQUE SPECS! If you are going to mount the engine to a stand, you need to remove the rear aluminum flywheel housing.

QUOTE FROM GM SI::::::::::::::::

Caution: Do not mount the engine to a engine stand by the flywheel housing. The aluminum flywheel housing is not designed to support the weight of the engine when mounted to a typical rear-mount engine stand. Mounting the engine stand to the aluminum flywheel housing may result in engine damage and serious personal injury.

Fastener Tightening Specifications
Application
Specification

Metric
English

A/C Compressor Bolt
50 Nm
37 lb ft

Air Cleaner Outlet Duct Clamp
8 Nm
71 lb in

Air Conditioning Compressor/Power Steering Pump Bracket Bolt
46 Nm
34 lb ft

Battery Cable Bracket Bolt
12 Nm
106 lb in

Battery Cable Bracket Nut
8 Nm
71 lb in

Bypass Pipe Bolt
21 Nm
15 lb ft

Camshaft Gear Bolt
234 Nm
173 lb ft

Camshaft Position Sensor Bolt
10 Nm
89 lb in

Camshaft Position Sensor Exciter Ring Bolt
9 Nm
80 lb in

Camshaft Thrust Plate Bolt
22 Nm
16 lb ft

Charged Air Cooler Bolt
21 Nm
15 lb ft

Charged Air Cooler Clamp
8 Nm
71 lb in

Connecting Rod Cap Bolt - Angular Tightening Method
1st Step 64 Nm
1st Step 47 lb ft

2nd Step 30 degrees
2nd Step 30 degrees

3rd Step 30 degrees
3rd Step 30 degrees

Coolant Pipe to Water Pump Nut
25 Nm
18 lb ft

Cooling Fan Pulley
41 Nm
30 lb ft

Crankshaft Balancer Bolt
1st Step 100 Nm
1st Step 74 lb ft

2nd Step 105 degrees
2nd Step 105 degrees

Crankshaft Bearing Cap Bolt - Angular Tightening Method
1st Step 98 Nm
1st Step 72 lb ft

2nd Step 132 Nm
2nd Step 97 lb ft

3rd Step 30 degrees
3rd Step 30 degrees

Crankshaft Bearing Cap Side Bolt
78 Nm
58 lb ft

Crankshaft Position Sensor Bolt
10 Nm
89 lb in

Crankshaft Position Sensor Spacer Bolt
10 Nm
89 lb in

Crossmember Bolt
100 Nm
74 lb ft

Cylinder Head M12 Bolt - Angular Tightening Method
1st Step 50 Nm
1st Step 37 lb ft

2nd Step 80 Nm
2nd Step 59 lb ft

3rd Step 60 degrees

4th Step 60 degrees

Cylinder Head M8 Bolt
25 Nm
18 lb ft

Drive Belt Tensioner Pulley Bolt
41 Nm
30 lb ft

EGR Bolt - California Emissions
20 Nm
15 lb ft

EGR Bracket Bolt - California Emissions
20 Nm
15 lb ft

EGR Valve Nut - California Emissions
19 Nm
14 lb ft

Engine Block Coolant Plug
18 Nm
13 lb ft

Engine Block Ground Bolt
34 Nm
25 lb ft

Engine Mount Through Bolt to Frame
75 Nm
55 lb ft

Engine Mount to Block Bolts
58 Nm
43 lb ft

Engine Mount to Frame Bolt
65 Nm
48 lb ft

Engine Shield Bolt
20 Nm
15 lb ft

Exhaust Heat Shield Nut
9 Nm
80 lb in

Exhaust Manifold Bolt/Nut
38 Nm
28 lb ft

Exhaust Manifold Heat Shield Bolts
8 Nm
71 lb in

Exhaust Outlet Clamp
15 Nm
11 lb ft

Exhaust Outlet Heat Shield Bolts
8 Nm
71 lb in

Exhaust Outlet Pipe Bolt
53 Nm
39 lb ft

Exhaust Pipe Bolt
53 Nm
39 lb ft

Exhaust Pipe Bracket Bolt
34 Nm
25 lb ft

Exhaust Pipe Clamp
40 Nm
30 lb ft

Exhaust Pipe Heat Shield Bolts
8 Nm
71 lb in

Fan Pulley Bracket Bolt
46 Nm
34 lb ft

Flywheel Bolt - Angular Tightening Method
1st Step 79 Nm
1st Step 58 lb ft

2nd Step 60 degrees
2nd Step 60 degrees

3rd Step 60 degrees
3rd Step 60 degrees

Flywheel Housing Bolt - Black Circle Mark
80 Nm
60 lb ft

Flywheel Housing to Upper Oil Pan Bolt - Black Triangle Mark
50 Nm
37 lb ft

Front Engine Cover Bolt
21 Nm
15 lb ft

Fuel Block Bolt
25 Nm
18 lb ft

Fuel Filter Bracket Bolt
21 Nm
15 lb ft

Fuel Injection Control Module Bolt
20 Nm
15 lb ft

Fuel Injection Control Module Bracket Bolt
21 Nm
15 lb ft

Fuel Injection Control Module Connector Bolt
10 Nm
89 lb in

Fuel Injection Control Module Connector Bracket Bolt
21 Nm
15 lb ft

Fuel Injection Control Module Cooler Eye Bolt
27 Nm
20 lb ft

Fuel Injection Pipe Nut
41 Nm
30 lb ft

Fuel Inlet Pipe Bracket Bolt
21 Nm
15 lb ft

Fuel Pipes Bracket Bolt
25 Nm
18 lb ft

Fuel Rail Assembly Bolt
25 Nm
18 lb ft

Fuel Rail Connector
45 Nm
33 lb ft

Fuel Return Pipe Eye Bolt - Cylinder Head Side
17 Nm
12 lb ft

Fuel Return Pipe Eye Bolt - Injector Side
16 Nm
12 lb ft

Fuel Return Pipe Sleeve Nut
41 Nm
30 lb ft

Fuel Return Sleeve Unit
41 Nm
30 lb ft

Fuel Injection Pump Assembly to Cylinder Block Bolt
21 Nm
15 lb ft

Fuel Injection Pump to Bracket Bolt
21 Nm
15 lb ft

Fuel Injection Pump Drive Gear Nut
70 Nm
52 lb ft

Fuel Line Bracket Nut
21 Nm
15 lb ft

Fuel Temperature Sensor Eye Bolt
15 Nm
11 lb ft

Function Block Nut
25 Nm
18 lb ft

Function Block to Injection Pipe Nut
41 Nm
30 lb ft

Generator Bracket Bolt
50 Nm
37 lb ft

Generator Positive Cable Nut
9 Nm
80 lb in

Glow Plug
18 Nm
13 lb ft

Glow Plug Connector Nut
2 Nm
18 lb in

Glow Plug Power Feed Nut
15 Nm
11 lb ft

Glow Plug Relay Assembly Bolt
25 Nm
18 lb ft

Heater Outlet Pipe/Nose Bolt
25 Nm
18 lb ft

Heater Outlet Pipe/Hose Nut
9 Nm
80 lb in

Heater Pipe Bolt
21 Nm
15 lb ft

Hood Hinge Bolt
25 Nm
18 lb ft

Idle Pulley Bolt/Screw
37 Nm
27 lb ft

Injector Bracket Bolt
50 Nm
37 lb ft

Injector Harness Bracket Bolt
9 Nm
80 lb in

Injector Terminal Nut
2 Nm
18 lb in

Injector Pipe Lock Plate Screws
4 Nm
35 lb in

Intake Air Heater
50 Nm
37 lb ft

Intake Air Heater Terminal Nut
4 Nm
35 lb in

Intake Manifold Bolts/Nuts
21 Nm
15 lb ft

Intake Manifold Tube Bolts/Nuts
9 Nm
80 lb in

Oil Cooler Adapter Bolts
21 Nm
15 lb ft

Oil Cooler Adapter Nuts
25 Nm
18 lb ft

Oil Cooler Assembly Bolts
25 Nm
18 lb ft

Oil Cooler Adapter Stud
10 Nm
89 lb in

Oil Drain Plug
84 Nm
62 lb ft

Oil Fill Tube Bolt
21 Nm
15 lb ft

Oil Filter
24 Nm
18 lb ft

Oil Gallery Plugs
53 Nm
39 lb ft

Oil Level Indicator Tube Bolt
21 Nm
15 lb ft

Oil Level Sensor Bolt
10 Nm
89 lb in

Oil Pan Bolts/Nuts - Lower
10 Nm
89 lb in

Oil Pan Bolt - Upper
20 Nm
15 lb ft

Oil Pan Skid Plate Bolt
20 Nm
15 lb ft

Oil Pressure Sensor Unit
30 Nm
22 lb ft

Oil Pressure Relief Valve
39 Nm
29 lb ft

Oil Pump Bolt
21 Nm
15 lb ft

Oil Pump Driven Gear Nut
100 Nm
74 lb ft

Oil Pump Gear Cover Bolt
21 Nm
15 lb ft

Oil Strainer Bolts/Nuts
25 Nm
18 lb ft

Piston Cooling Nozzle Eye Bolt
21 Nm
15 lb ft

Positive Cable Junction Block Bracket to Power Steering Pump Bolt
9 Nm
80 lb in

Positive Crankcase Ventilation Cover Screws
4 Nm
35 lb in

Positive Crankcase Ventilation Oil Separator Bracket Nut
25 Nm
18 lb ft

Power Steering Pump Bracket Bolt
50 Nm
37 lb ft

Power Steering Pump Bolt
50 Nm
37 lb ft

Power Steering Pump Bracket Bolt
46 Nm
34 lb ft

Rocker Arm Shaft Bracket Bolt
41 Nm
30 lb ft

Starter Motor Bolt
78 Nm
58 lb ft

Transmission Fill Tube Nut
18 Nm
13 lb ft

Thermostat Housing Bolts/Nuts
25 Nm
18 lb ft

Thermostat Cover Bolt
21 Nm
15 lb ft

Torque Converter Bolt
60 Nm
44 lb ft

Transmission Oil Cooler Clip Nut
9 Nm
80 lb in

Turbocharger Bolt
108 Nm
80 lb ft

Turbocharger Boost Sensor Bolt
10 Nm
89 lb in

Turbocharger Coolant Outlet Pipe Bracket Bolts
21 Nm
15 lb ft

Turbocharger Heat Shield Bolts
9 Nm
80 lb in

Turbocharger Inlet Duct to Turbocharger Bolt
9 Nm
80 lb in

Turbocharger Oil Return Pipe Stud
10 Nm
89 lb in

Turbocharger Oil Supply Hose Eye Bolt
34 Nm
25 lb ft

Turbocharger Oil Return Pipe Bolts/Nuts
21 Nm
15 lb ft

Turbocharger Thermostatic Coolant Valve

60 Nm
44 lb ft

Upper Oil Pan to Flywheel Housing Screws
20 Nm
15 lb ft

Vacuum Pump Nuts - California Emissions
22 Nm
16 lb ft

Valve Adjusting Screw Nut
22 Nm
16 lb ft

Valve Lifter Holdown Bracket Bolt
11 Nm
97 lb in

Valve Rocker Arm Cover Bolt - Lower
10 Nm
89 lb in

Valve Rocker Arm Cover Bolt - Upper
8 Nm (Two Times)
71 lb in (Two Times)

Water Outlet Bolts
25 Nm
18 lb ft

Water Pump Bolt
21 Nm
15 lb ft
__________________
1998 Chevy k-2500 454 147,000 miles and climbing!

1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!
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  #7  
Old 08-01-2009, 01:42 PM
Duramaster's Avatar
Duramaster Duramaster is offline
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Join Date: Mar 2007
Location: Pacific Northwest
Posts: 735
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There are also three different thicknesses of head gasket plus a right and a left. You will need to check the piston protrusion of the new piston/ bearing assy before assy. Check your e-mail for the procedure. Remember to use new head bolts, rod bolts, crankshaft bearing cap bolts too................. You might try and get yourself a good manual for reference. This isn't your everyday 6.5 diesel!
__________________
1998 Chevy k-2500 454 147,000 miles and climbing!

1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

Last edited by Duramaster; 08-01-2009 at 02:04 PM.
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