8.1L torque specs

[SSilverado60]

Im rebuiling an 8.1L 496 and having trouble finding torque specs for some things. Anyone know the torque specs for at least the head bolts, rod bearings, and main bearings?


thanks in advance

[ARNIECHEV]

this is for a 2003


Accessory Drive Belt Tensioner Bolt
50 N·m
37 lb ft

Air Cleaner Outlet Duct Clamp
4 N·m
35 lb in

Air Conditioning (A/C) Belt Tensioner Bolt
50 N·m
37 lb ft

Battery Cable Channel Bolt
9 N·m
80 lb in

Camshaft Position Sensor Bolt
12 N·m
106 lb in

Camshaft Retainer Bolt
12 N·m
106 lb in

Camshaft Sprocket Bolt
30 N·m
22 lb ft

Connecting Rod Nut
30 N·m + 90 Degrees
22 lb ft + 90 Degrees

Coolant Crossover Pipe Bolt
50 N·m
37 lb ft

Coolant Drain Hole Plug

Left Front
60 N·m
44 lb ft

Sides
30 N·m
22 lb ft

Crankshaft Balancer Bolt
255 N·m
189 lb ft

Crankshaft Bearing Cap Inner Bolts

First Pass
30 N·m
22 lb ft

Final Pass
90 Degrees

Crankshaft Bearing Cap Outer Studs

First Pass
30 N·m
22 lb ft

Final Pass
80 Degrees

Crankshaft Oil Deflector Nut
50 N·m
37 lb ft

Crankshaft Position Sensor Bolt
12 N·m
106 lb in

Crossbar Bolt
100 N·m
74 lb ft

Cylinder Head Bolt - In Sequence

First Pass
30 N·m
22 lb ft

Second Pass
30 N·m + 120 Degrees
22 lb ft + 120 Degrees

Final Pass - Long Bolts #1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 17
60 Degrees

Final Pass - Medium Bolts #15, 18
45 Degrees

Final Pass - Short Bolts #4, 5, 12, 13
30 Degrees

Cylinder Head Coolant Hole Plug
35 N·m
26 lb ft

Drive Belt Idler Pulley Bolt
50 N·m
37 lb ft

EGR Adapter Nut
22 N·m
16 lb ft

EGR Valve Nut
22 N·m
16 lb ft

EGR Valve Pipe Bolt
25 N·m
18 lb ft

EGR Valve Pipe Bracket Bolt
50 N·m
37 lb ft

EGR Valve Pipe Nut
25 N·m
18 lb ft

EGR Valve Pipe Stud in Exhaust Manifold
12 N·m
106 lb in

Engine Block Heater
50 N·m
37 lb ft

Engine Coolant Temperature (ECT) Sensor
35 N·m
26 lb ft

Engine Coolant Temperature (ECT) Sensor Bracket Bolt
50 N·m
37 lb ft

Engine Harness Bolt
5 N·m
44 lb in

Engine Harness Ground Bolt
16 N·m
12 lb ft

Engine Harness Stud
10 N·m
89 lb in

Engine Mount Bolt-to-Engine Bracket
50 N·m
37 lb ft

Engine Mount-to-Engine Bracket Bolt
50 N·m
37 lb ft

Engine Mount Frame Bracket Thru Bolt
75 N·m
55 lb ft

Engine Mount Frame Side Mount Bolt
65 N·m
50 lb ft

Engine Sight Shield Bracket Nut
5 N·m
44 lb in

Engine Wiring Harness Bolt
16 N·m
12 lb ft

Exhaust Manifold

Center Bolt
35 N·m
26 lb ft

Nut
16 N·m
12 lb ft

Stud
20 N·m
15 lb ft

Exhaust Manifold Heat Shield

Bolt
25 N·m
18 lb ft

Nut
25 N·m
18 lb ft

Flywheel Bolt

First Pass
40 N·m
30 lb ft

Second Pass
80 N·m
59 lb ft

Final Pass
100 N·m
74 lb ft

Front Cover Bolt

First Pass
6 N·m
53 lb in

Final Pass
12 N·m
106 lb in

Fuel Rail Stud
12 N·m
106 lb in

Heater Hose Bracket Bolt
50 N·m
37 lb ft

Hood Hinge Bolt
25 N·m
18 lb ft

Ignition Coil Bolt
12 N·m
106 lb in

Ignition Coil Wiring Harness Bolt
12 N·m
106 lb in

Intake Manifold Bolt - In Sequence

First Pass
5 N·m
44 lb in

Second Pass
8 N·m
71 lb in

Third Pass
12 N·m
106 lb in

Final Pass
15 N·m
12 lb ft

J 42847 Flywheel Holding Tool Bolt
50 N·m
37 lb ft

Knock Sensor
20 N·m
15 lb ft

Knock Sensor Heat Shield Bolt
12 N·m
106 lb in

Lift Bracket Bolt
40 N·m
30 lb ft

MAP Sensor Bolt
12 N·m
106 lb in

Oil Cooler Hose Fittings
23 N·m
17 lb ft

Oil Fill Tube Bolt
12 N·m
106 lb in

Oil Filter
38 N·m
28 lb ft

Oil Filter Fitting
66 N·m
49 lb ft

Oil Gallery Plug

Front
20 N·m
15 lb ft

Left
30 N·m
22 lb ft

Rear
30 N·m
22 lb ft

Top
20 N·m
15 lb ft

Oil Level Indicator Tube Bracket Bolt
25 N·m
18 lb ft

Oil Level Sensor
20 N·m
15 lb ft

Oil Pan Bolt

First Pass
10 N·m
89 lb in

Final Pass
25 N·m
18 lb ft

Oil Pan Drain Plug
28 N·m
21 lb ft

Oil Pan Skid Plate Bolt
20 N·m
15 lb ft

Oil Pressure Gauge Sensor
30 N·m
22 lb ft

Oil Pump Bolt
75 N·m
56 lb ft

Oil Pump Cover Bolt
12 N·m
106 lb in

Oil Pump Drive Bolt
25 N·m
18 lb ft

Power Steering Pump Bracket Bolt/Nut
50 N·m
37 lb ft

Power Steering Pump Bracket Stud
20 N·m
15 lb ft

Purge Solenoid Bolt
8 N·m
71 lb in

Spark Plug
30 N·m
22 lb ft

Thermostat Housing Bolt
30 N·m
22 lb ft

Throttle Body

Nut
10 N·m
89 lb in

Stud
12 N·m
106 lb in

Valve Lifter Guide Retainer Bolt
25 N·m
18 lb ft

Valve Rocker Arm Cover Bolt

First Pass
6 N·m
53 lb in

Final Pass
12 N·m
106 lb in

Valve Rocker Arm Nut
35 N·m
26 lb ft

Valve Rocker Arm Stud
50 N·m
37 lb ft

Water Pump Bolt

First Pass
25 N·m
18 lb ft

Final Pass
50 N·m
37 lb ft

Water Pump Pulley Bolt
25 N·m
18 lb ft



© 2010 General Motors. All rights reserved

[SSilverado60]

That is perfect! thanks a lot.

Do you have a pic of the head bolt sequence? Also those specs for the rod and main bolts kind of make it look like they are TTY. the main and rod bearing bolts are NOT TTY correct?

[ARNIECHEV]

Tighten

Tighten the bolts a first pass in sequence to 30 N·m (22 lb ft)
Tighten the bolts a second pass in sequence to 30 N·m (22 lb ft) then an additional 120 degrees using J 36660-A .
Tighten the bolts (1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 17) an additional 60 degrees, bolts (15, and 18) an additional 45 degrees, and bolts (4, 5, 12, and 13) an additional 30 degrees a final pass in sequence using J 36660-A .

this is the sequence trying to get a numbered pic loaded but im a tard apprently

[ARNIECHEV]

here ya go

[SSilverado60]

great! Thanks a lot for the info. Do you know if the main and rod bearing bolts are in fact NOT torque to yield (TTY) bolts?

[Grumpy_old_fart]

500 ft/lbs, and half a turn.

thats a good torque spec for something... just gotta remember what...

[ARNIECHEV]

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: When installing the piston/connecting rod assembly, NEW connecting rod nuts must be installed.

[Grumpy_old_fart]

does NOBODY have the 20 bucks for a fawkin manual these days?

go to NAPA and buy it.... jesus.

[SSilverado60]

Originally Posted by Grumpy_old_fart

does NOBODY have the 20 bucks for a fawkin manual these days?

go to NAPA and buy it.... jesus.

And why in the hell would I do that???

I got my answers here faster than a trip to napa and for free . . .

Just because you might have wasted your money on something like that doesnt mean others need to make the same mistakes.

Forums do have a purpose other than giving trolls like you a place to bitch and moan.







anyways, ARNIECHEV, thanks again for all the info

[Grumpy_old_fart]

son, you need to work a little harder at making friends and influencing people.

or... do you need the class?

[SSilverado60]

its a forum, i dont really give a shit what you think about me, ive searched these forums and read enough on here to know what you are about . . .

you dont have anything to add to my question, so you are useless here, like you are in a lot of other places on here. Ive read things from you that were helpful, and a hell of a lot that wasnt, just like this situation.

If i wanted to waste my money on a book, i would have done it already. but there is no need when there are people that are helpful and more than willing to give out the info that I, and im sure others will eventually need.

[Grumpy_old_fart]

Originally Posted by SSilverado60

its a forum, i dont really give a shit what you think about me, ive searched these forums and read enough on here to know what you are about . . .

you dont have anything to add to my question, so you are useless here, like you are in a lot of other places on here. Ive read things from you that were helpful, and a hell of a lot that wasnt, just like this situation.

If i wanted to waste my money on a book, i would have done it already. but there is no need when there are people that are helpful and more than willing to give out the info that I, and im sure others will eventually need.

There is a place to ask these questions.
this is not it.

you know what I am about? do tell.

you see, perception is everything to those with the eyeballs. until you stand in my shoes, you dont know shit about me.

You would do well to waste money on a book. there are things in there that you can learn from. In life, education is from experience. in a book, you can actually avoid the future headaches. of course, you dont gain much in the way of experience, but a book is meant to give concrete information you can trust.

I dont trust torque specs to someone that posts them on the internet. Hence my comment about 500 ft/lbs and half a turn. yes, it is a torque spec. you couldnt tell me for what, either. thats where the book comes in handy.

now, be a good newbie, and go to the newbie forum where people have to be nice to your retarded ass.

[SSilverado60]

you try to tell me that i dont know shit about you because i dont stand in your shoes, yet in the next line you try to tell me what would do me well. . . .

You are a hypocrite. get over yourself

if you dont trust the torque specs given here then dont use them, go buy yourself that book you seem to covet instead of using the other resources at your disposal.

This was a very chevy specific question, which is why i posted it here, if you dont like it, dont click on it. It would seem i asked the question in the right spot since it was answered so quickly and perfectly.

Im sorry it wasnt hard core enough of a question for you.

once again, get over yourself hypocrite

[Grumpy_old_fart]

Originally Posted by SSilverado60

you try to tell me that i dont know shit about you because i dont stand in your shoes, yet in the next line you try to tell me what would do me well. . . .

You are a hypocrite. get over yourself

if you dont trust the torque specs given here then dont use them, go buy yourself that book you seem to covet instead of using the other resources at your disposal.

This was a very chevy specific question, which is why i posted it here, if you dont like it, dont click on it. It would seem i asked the question in the right spot since it was answered so quickly and perfectly.

Im sorry it wasnt hard core enough of a question for you.

once again, get over yourself hypocrite

Good judgment comes from experience.

where does experience come from?

Bad judgment.

advice given.

We know youre sorry. you should try to apologize for wasting our time. Had you asked the question in the right place, you wouldnt be reading this at all.

as for me being a hypocrite, perhaps your perceptional skills are lacking. After all, you did post your question in the wrong forum.

[SSilverado60]

My question got answered, actually it was answered quickly, looks like the right forum to me. I guess poser shots of your rig on a dirt hill are more appropriate than a question about a chevy motor in a chevy forum.

The only time wasted here seems to be yours, I got my answer, and a nice productive member of the forum helped me out. You did get some good troll time in though so maybe this isnt time wasted for you.

[Grumpy_old_fart]

you dont read much of the stickies, do you?

(that was a hint)

[Paul Gagnon]

moved from Chevy

[ARNIECHEV]

wow snowball anyone

[Grumpy_old_fart]

Thank you, Paul, for your common sense!