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#1 DCSTech

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Posted 21 February 2008 - 06:26 PM

:crackup:

Does anyone out there know what the torque spec is on the oil pan drain plug
on a Chevy Silverado GMT900 4.8L LY2 engine. Can't find it in the owners manual,
unless I missed it.

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#2 07Graystone

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Posted 21 February 2008 - 06:59 PM

Just tighten it until it strips, then back it off 1/2 turn. :crackup: J/K That was my Dad's answer to any such question. Sorry for the intrusion. :lol:
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#3 D&SYukonDenali

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Posted 21 February 2008 - 07:04 PM

:crackup:

Does anyone out there know what the torque spec is on the oil pan drain plug
on a Chevy Silverado GMT900 4.8L LY2 engine. Can't find it in the owners manual,
unless I missed it.



Not sure on the 4.8L, on the 6.2 Lt is 18 ft-lbs

#4 hubbycap

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Posted 21 February 2008 - 07:38 PM

Never really thought about this and subsequently never drug a torque wrench under a vehicle during an oil change. I've never stripped an oil drain plug. Is kind-of-tight quantifiable? :crackup:
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#5 DV2000NJ

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Posted 21 February 2008 - 07:44 PM

I just go to snug, then another quarter turn or so... :crackup:

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#6 M. Cueva

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Posted 21 February 2008 - 07:49 PM

That is interesting, here is some info:



Posted Image Service Information
2007 Chevrolet Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1664083 Fastener Tightening Specifications Application

Specification

Metric

English

Accessory Drive Belt Idler Pulley Bolt

50 Nm

37 lb ft

Accessory Drive Belt Tensioner Bolts

50 Nm

37 lb ft

Active Fuel Management Oil Pressure Relief Valve

27 Nm

20 lb ft

Air Conditioning Drive Belt Tensioner Bolts

50 Nm

37 lb ft

Automatic Transmission Flex Plate Bolts - First Pass

20 Nm

15 lb ft

Automatic Transmission Flex Plate Bolts - Second Pass

50 Nm

37 lb ft

Automatic Transmission Flex Plate Bolts - Final Pass

100 Nm

74 lb ft

Battery Cable Channel Bolt

12 Nm

106 lb in

Camshaft Position (CMP) Actuator Magnet Bolts

12 Nm

106 lb in

Camshaft Position (CMP) Actuator Solenoid Valve - First Pass

65 Nm

48 lb ft

Camshaft Position (CMP) Actuator Solenoid Valve - Final Pass

90 degrees

Camshaft Position (CMP) Sensor Bolt

12 Nm

106 lb in

Camshaft Position (CMP) Sensor Wire Harness Bolt

12 Nm

106 lb ft

Camshaft Retainer Bolts - Hex Head Bolts

25 Nm

18 lb ft

Camshaft Retainer Bolts - TORX Head Bolts

15 Nm

11 lb ft

Camshaft Sprocket Bolt - First Pass

75 Nm

55 lb ft

Camshaft Sprocket Bolt - Final Pass

50 degrees

Connecting Rod Bolts - First Pass

20 Nm

15 lb ft

Connecting Rod Bolts - Final Pass

85 degrees

Coolant Air Bleed Pipe and Cover Bolts

12 Nm

106 lb in

Coolant Temperature Sensor

20 Nm

15 lb ft

Crankshaft Balancer Bolt - Installation Pass - to Ensure the Balancer is Completely Installed

330 Nm

240 lb ft

Crankshaft Balancer Bolt - First Pass - Install a NEW Bolt After the Installation Pass and Tighten as Described in the First and Final Passes

50 Nm

37 lb ft

Crankshaft Balancer Bolt - Final Pass

140 degrees

Crankshaft Bearing Cap M8 Bolts

25 Nm

18 lb ft

Crankshaft Bearing Cap M10 Bolts - First Pass in Sequence

20 Nm

15 lb ft

Crankshaft Bearing Cap M10 Bolts - Final Pass in Sequence

80 degrees

Crankshaft Bearing Cap M10 Studs - First Pass in Sequence

20 Nm

15 lb ft

Crankshaft Bearing Cap M10 Studs - Final Pass in Sequence

51 degrees

Crankshaft Oil Deflector Nuts

25 Nm

18 lb ft

Crankshaft Position (CKP) Sensor Bolt

25 Nm

18 lb ft

Crankshaft Rear Oil Seal Housing Bolts

30 Nm

22 lb ft

Crossbar Bolts/Nuts - 1500 Series

100 Nm

74 lb ft

Crossbar Bolts/Nuts - 2500 Series

120 Nm

89 lb ft

Cylinder Head M8 Bolts - in Sequence

30 Nm

22 lb ft

Cylinder Head M11 Bolts - First Pass in Sequence

30 Nm

22 lb ft

Cylinder Head M11 Bolts - Second Pass in Sequence

90 degrees

Cylinder Head M11 Bolts - Final Pass in Sequence

70 degrees

Cylinder Head Plug

20 Nm

15 lb ft

Differential Carrier-to-Crossbar Nuts

100 Nm

74 lb ft

Engine Block Coolant Drain Hole Plug

60 Nm

44 lb ft

Engine Block Coolant Heater

50 Nm

37 lb ft

Engine Block Oil Gallery Plugs

60 Nm

44 lb ft

Engine Harness Ground Strap Bolt/Stud

16 Nm

12 lb ft

Engine Harness-to-Generator Bracket Bolt

9 Nm

80 lb in

Engine Harness Retainer-to-Intake Manifold Nut

5 Nm

44 lb in

Engine Mount Bracket Through Bolt

100 Nm

74 lb ft

Engine Mount-to-Engine Block Bolts

50 Nm

37 lb ft

Engine Mount-to-Frame Bolts

65 Nm

48 lb ft

Engine Shield-to-Crossbar Bolts

20 Nm

15 lb ft

Evaporative (EVAP) Emission Pipe Bracket Nut

20 Nm

15 lb ft

Exhaust Manifold Bolts - First Pass

15 Nm

11 lb ft

Exhaust Manifold Bolts - Final Pass

20 Nm

15 lb ft

Exhaust Manifold Heat Shield Bolts

9 Nm

80 lb in

Exhaust Manifold Studs

20 Nm

15 lb ft

Flex Plate-to-Torque Converter Bolts - 4L60-E/4L70-E/6L80 Transmission

63 Nm

47 lb ft

Flex Plate-to-Torque Converter Bolts - 4L80-E Transmission

60 Nm

44 lb ft

Front Cover Bolts

25 Nm

18 lb ft

Front Drive Axle Bracket Bolts

90 Nm

67 lb ft

Fuel Injection Fuel Rail Bolts

10 Nm

89 lb in

Fuel Injection Fuel Rail Crossover Tube Bolts

3.8 Nm

34 lb in

Fuel Rail Stop Bracket Bolt

50 Nm

37 lb ft

Generator Bracket Bolts

50 Nm

37 lb ft

Heater Hose Bracket Nut

9 Nm

80 lb in

Ignition Coil Bracket-to-Valve Rocker Arm Cover Studs

12 Nm

106 lb in

Ignition Coil-to-Bracket Bolts

10 Nm

89 lb in

Intake Manifold Bolts - First Pass in Sequence

5 Nm

44 lb in

Intake Manifold Bolts - Final Pass in Sequence

10 Nm

89 lb in

Intake Manifold Sight Shield Retainer Bolts

5 Nm

44 lb in

J 41798 M8 Bolt

25 Nm

18 lb ft

J 41798 M10 Bolts

50 Nm

37 lb ft

Knock Sensor Bolts

25 Nm

18 lb ft

Negative Battery Cable Stud

25 Nm

18 lb ft

Oil Filter

30 Nm

22 lb ft

Oil Filter Fitting

55 Nm

40 lb ft

Oil Level Indicator Switch

20 Nm

15 lb ft

Oil Level Indicator Tube Bolt

25 Nm

18 lb ft

Oil Pan Baffle Bolts

9 Nm

80 lb in

Oil Pan Closeout Cover Bolt - Left Side

9 Nm

80 lb in

Oil Pan Closeout Cover Bolt - Right Side

9 Nm

80 lb in

Oil Pan Cover Bolts

9 Nm

80 lb in

Oil Pan Drain Plug

25 Nm

18 lb ft

Oil Pan M6 Bolts - Oil Pan-to-Rear Housing

12 Nm

106 lb in

Oil Pan M8 Bolts - Oil Pan-to-Engine Block and Oil Pan-to-Front Cover

25 Nm

18 lb ft

Oil Pan Skid Plate Bolts

28 Nm

21 lb ft

Oil Pressure Sensor

35 Nm

26 lb ft

Oil Pump Cover Bolts

12 Nm

106 lb in

Oil Pump Relief Valve Plug

12 Nm

106 lb in

Oil Pump Screen Nuts

25 Nm

18 lb ft

Oil Pump Screen-to-Oil Pump Bolts

12 Nm

106 lb in

Oil Pump-to-Engine Block Bolts

25 Nm

18 lb ft

Power Steering Pump-to-Engine Block Bolts

50 Nm

37 lb ft

Spark Plugs

15 Nm

11 lb ft

Throttle Body Bolts

10 Nm

89 lb in

Throttle Body Nuts

10 Nm

89 lb in

Throttle Body Studs

6 Nm

53 lb in

Timing Chain Tensioner Bolts

25 Nm

18 lb ft

Transfer Case Vent Hose Bracket Nut

20 Nm

15 lb ft

Transmission Housing-to-Engine Bolts/Studs

50 Nm

37 lb ft

Transmission Oil Cooler Line Clip Bolt

9 Nm

80 lb in

Transmission Oil Level Indicator Tube Nut

18 Nm

13 lb ft

Valley Cover Bolts

25 Nm

18 lb ft

Valve Lifter Guide Bolts

12 Nm

106 lb in

Valve Lifter Oil Manifold Bolts

25 Nm

18 lb ft

Valve Rocker Arm Bolts

30 Nm

22 lb ft

Valve Rocker Arm Cover Bolts

12 Nm

106 lb in

Water Inlet Housing Bolts

15 Nm

11 lb ft

Water Pump Bolts - First Pass

15 Nm

11 lb ft

Water Pump Bolts - Final Pass

30 Nm

22 lb ft

2008 General Motors Corporation. All rights reserved.

Slade_zpsfd1fdb0c.jpg

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#7 M. Cueva

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Posted 21 February 2008 - 07:51 PM

I didnt know that there were specs until I looked it up.....

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"Based on Intel's dramatic sales warning Wednesday, you might expect rival Advanced Micro Devices to just crawl into a hole and die."


#8 DCSTech

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Posted 21 February 2008 - 08:16 PM

Never really thought about this and subsequently never drug a torque wrench under a vehicle during an oil change. I've never stripped an oil drain plug. Is kind-of-tight quantifiable? :crackup:


I never really thought about it either after decades of working on my vehicles, but I have a tendency to tighten everything until my wrench breaks or I pull a muscle and there is nothing worse than taking a simple, routine job and turning it into a time consuming nightmare with a stripped bolt. The new oil pans are made of aluminum, with a steel bolt and those aluminum threads will strip a lot quicker than the old iron pans. Maybe I am getting lazy in my old age or possibly wiser but I find myself using a torque wrench for a lot more jobs where the wrong outcome could be disastrous and/or expensive.

Posted Image
2007 Silverado LT1, Z71, 4.8L.
18" Aluminum Wheels, P265/65R18 OOR BW Dueller A/T's
GM 6" oval steps, hood protector, splash guards,DIC & remote start upgrade, tailgate lock upgrade,
rear fenderwell liners. EZ-Down tailgate damper, fog light upgrade, GM wheel locks.
GMT400 Underhood Reel Light, Spray in bedliner, 56" Better Built black tool chest.
GM ELITE Truck Club member #26


#9 DCSTech

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Posted 21 February 2008 - 08:32 PM

I didnt know that there were specs until I looked it up.....



Thanks for the detailed info Mike. I may only use a fraction of them, but at least I know
what has a torque spec. Sure is a lot of them, huh?

Posted Image
2007 Silverado LT1, Z71, 4.8L.
18" Aluminum Wheels, P265/65R18 OOR BW Dueller A/T's
GM 6" oval steps, hood protector, splash guards,DIC & remote start upgrade, tailgate lock upgrade,
rear fenderwell liners. EZ-Down tailgate damper, fog light upgrade, GM wheel locks.
GMT400 Underhood Reel Light, Spray in bedliner, 56" Better Built black tool chest.
GM ELITE Truck Club member #26


#10 WFO

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Posted 21 February 2008 - 08:47 PM

Good info.
Thanks!
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#11 M. Cueva

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Posted 21 February 2008 - 09:45 PM

stupid question, how can I make this into a pdf (it is originally a table in DealerWorld) so I can post it on the Wiki???

Slade_zpsfd1fdb0c.jpg

My Truck:
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See my website for Customizations/Upgrades: Silverado Upgrades/Changes
"Based on Intel's dramatic sales warning Wednesday, you might expect rival Advanced Micro Devices to just crawl into a hole and die."


#12 DCSTech

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Posted 21 February 2008 - 10:12 PM

stupid question, how can I make this into a pdf (it is originally a table in DealerWorld) so I can post it on the Wiki???



I highlighted all of the information and right clicked to copy it, then opened up an Excel spreadsheet
and pasted it in Excel. Once you get it there you can organize, modify or do whatever you want with
it. Then save it as a filename of your choice, in the location of your choice and your done.
You can also save it in Word, wordpad or any other program of your choice. I used Excel because I find it easier
to manipilate & modify.

Posted Image
2007 Silverado LT1, Z71, 4.8L.
18" Aluminum Wheels, P265/65R18 OOR BW Dueller A/T's
GM 6" oval steps, hood protector, splash guards,DIC & remote start upgrade, tailgate lock upgrade,
rear fenderwell liners. EZ-Down tailgate damper, fog light upgrade, GM wheel locks.
GMT400 Underhood Reel Light, Spray in bedliner, 56" Better Built black tool chest.
GM ELITE Truck Club member #26


#13 pm26

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Posted 21 February 2008 - 10:39 PM

Ok, I have to chime in on this one. Even if there is a torque spec for an oil pan drain plug, that torque spec will be most likely for dry threads, and that will not be the case here. Oiled threads will decrease the friction in threads to the point where the preload on the bolt will be practically twice as high as if the threads were dry. About 90% of torque applied to a bolt goes toward overcoming the friction in the threads, and only 10% toward the bolt elongation (in the elastic range).

Translation: do not torque oil pan drain plugs. Only tighten snug with a short ratchet/socket. This is especially important with aluminum oil pans. I tell you, there is a lot of unhappy guys on motorcycle forums who have stripped the threads in their expensive aluminum oil pans by trying to torque the drain plug to "spec".

There is a rubber lined washer under the drain plug. You need to only compress that rubber on the washer sufficiently to get a good seal and tighten the plug enough so it will not back out due to vibration. If an aluminum sealing washer is used, tighten the plug just enough to cut a small groove int he aluminum washer, which will create a positive seal. Do not reuse grooved aluminum or cooper washers, as they may leak if you do not line up the groove right.

I have done hundreds of oil changes on all kinds of vehicles and never stripped the plug threads or had a leak using my method. And I always replace aluminum sealing washers with new ones.

Edited by pm26, 21 February 2008 - 10:41 PM.


#14 M. Cueva

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Posted 21 February 2008 - 10:49 PM

now here is a stupid question, does the GMT800 series trucks have the aluminum oil pan or is it steel?

Slade_zpsfd1fdb0c.jpg

My Truck:
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See my website for Customizations/Upgrades: Silverado Upgrades/Changes
"Based on Intel's dramatic sales warning Wednesday, you might expect rival Advanced Micro Devices to just crawl into a hole and die."


#15 alaskaLTZ

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Posted 21 February 2008 - 10:50 PM

now here is a stupid question, does the GMT800 series trucks have the aluminum oil pan or is it steel?



aluminum

Posted Image

2009 Silverado LTZ 2500HD Crew Cab 4x4 6.0 6L90

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