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Bolt size and torque spec thread.

TheOtherNick

TheOtherNick

The mod from over yonder
Feel free to add more stuff I got most of the common stuff.

dog bone=15mm
fender brace=13mm
supercharger=10mm, one 13mm
tb=10mm, 2 8mm on the support bracket for n/a cars
egr=13mm
egr tube bolts=3/2"
valve cover=3/8
alt bolts and nut= 15mm
map bolts=10mm
water pump pulley=8mm
front cover and water pump 10mm and 13mm
crank bolt=15/16
rear cover=3/8
oil pan 3/8
head bolt= 5/8IIRC
head stud nut= 1/2" 12 or 6 point
x over nuts= 13mm
starter bolt=15mm
starter batter pos nut=13mm 14mm on some after market
starter relay wire=10mm
p/s pump=13mm
tensioner pulley=15mm or t55 torx
icm bracket=15mm
cam bolt= 1 1/16" or 24mm IIRC
torque converter bolts=18mm
transmission bell-housing bolts=18mm
rear engine to trans bracket bolts=13mm
axle nut 32-36mm depending on year and axle manufacturer
strut to knuckle bolts=21mm
ball joint nut=18mm 19mm on some aftermarket
strut top nuts 15mm
front sway bar bushing clamp bolts=15mm links 13mm-15mm depending on manufacturer
rear sway bar link nuts=18mm, 15mm on back to hold the ball
manifold bolts 13mm
02 sensor= 7/8"
icm harness bolt=7mm
Lim bolts=3/8"
front hub bolts=1/2"
rear hub bolts=10mm
blower motor/blower resistor 7/32"
small dash bolts=7mm larger ones 13-18mm
Seat bolts=T60 torx IIRC
headlight mounting bracket bolts=10mm(2)
 
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Re: Bolt size thread

Note: All bolts with an additional torque or degrees (*) are torque to yield bolts will will need to be replaced after removal. Also all specs are done usings a good torque wrench and torque angle meter. Not your grand pas wrench from 1944 that has never been checked since the 50's.

A/C compressor front nuts 100 N.m (74 lb ft) .
A/C compressor rear bolts 31 N.m (23 lb ft) .
Camshaft Sprocket Bolt First Pass 74 lb. ft. Final Pass + 90°
Connecting Rod Cap Bolt 20 ft.lb +50*
crankshaft balancer bolt 150 Nm (111 ft. lbs.) + 76*
Crankshaft Main Bearing Cap Bolt 30 ft. lbs. \ +110*
Crankshaft Main Bearing Cap Bolt (Side) 11 ft. lbs. +45*
Comp Cams rocker bolts 23 lb ft.
EGR Valve37 lb. ft.
(EGR) inlet/outlet pipe bolt (21 ft. lbs.)
Exhaust Manifold Bolt/Nut 22 lb. ft.
exhaust manifold pipe stud nuts 32 Nm (24 ft. lbs.)
exhaust crossover pipe bolts and studs 18 Nm (13 ft. lbs.)
Flywheel Bolts11 lb. ft. +50*
front head First pass 37 lb. ft. Second pass +120* Final pass +30*(only 96-01 cars inner 4 bolts) When using head studs work your way up to 90ftlbs using the same picture, I did three passes on mine. 30-60-90
84936928-1.gif

Rear head Same specs different picture
84936928.gif

knock sensor 19 N.m (14 lb ft) .
LIM 11 lb. ft. Start in the center and work your way out.
oil pan bolts 14 Nm (125 inch lbs.)
Oil Pump Pipe and Screen Bolt 11 ft.lb
oil level sensor 20 Nm (15 ft. lbs.)
Power steering pump bolts 25 ft. lbs
Tighten the valve rocker arm bolt \ 15 Nm (11 ft. lbs.) +90*
supercharger 17 lb. ft. Start in the center and work your way out.
supercharger snout 15 lb.ft. Start in the center and work your way out.
Throttle Body Bolt/Nut 89 lb. in. (7.5 lb. ft.)
Upper plenum 89in.lb. (7.5 lb. ft.)
Water Pump Bolt (Long) 25 ft.lb
Water Pump Bolt (Short) 16 ft.lb
Water Pump Bolt (SAL) 89 in.lb (7.5 lb. ft.)
Water Pump Pulley Bolt (3.8L) 115 in.lb (9.5 lb. ft.)

If anyone has more that they need or would like me to had post them up and I will add them. Vendor bolts/studs etc.
 
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Re: Bolt size thread

TheOtherNick said:
Feel free to add more stuff I got most of the common stuff.


hub bolts=1/2"
Click to expand...

Fronts are, rears are different... I did one of my rears yesterday and it was 10mm(not 3/8's) for the hub with like maybe a t25(?) to get the ebrake junk off to get it out
 
Re: Bolt size thread

Oh and add that the egr hose bolts are 3/8's too, cause I rounded one off on the exhaust manifold of a buddies car the other day using a 10mm and some brute force. Oh how I loved drilling that one out...
 
Re: Bolt size thread

This thread was my idea, Nick just provided the information.

Typically where you see 13mm above, 1/2" will fit better.
 


Re: Bolt size thread

TheOtherNick said:
Never stripped one on my many builds, just use good sockets and you will be fine.
Click to expand...

Truth. Although even a good Snappy 6 pointer can occasionally round out some of the bolts. Not often though. Oh yeah..and Nick. Having air keeps the hand ratchet from twisting off the bolt head. Most won't have air.

I absolutely don't know what I did before the 3/8" ingersol titanium came into my life.
 
Re: Bolt size thread

My son just bought a 1997 Grand Prix GTP. What is the size of the Valve cover bolts? There is one missing on the front cover, and the threads are stripped. I want to use a Helicoil to fix it, but I need to know what size I need. It's a great car otherwise. Thank you for the help :)
 
Re: Bolt size thread

flynnaz said:
My son just bought a 1997 Grand Prix GTP. What is the size of the Valve cover bolts? There is one missing on the front cover, and the threads are stripped. I want to use a Helicoil to fix it, but I need to know what size I need. It's a great car otherwise. Thank you for the help :)
Click to expand...

The bolt itself is 1" long from tip to the bottom of the flange and is a 3/8" head. It has a non removable (as far as I can tell) metal washer and stem that hold the rubber grommet on it. It is a 1/4" shank with a 1/4"x20 thread.

length.jpg

head.jpg

Flange.jpg

Insert.jpg
 


Thank you for the information. I went to the junk yard and picked one up for $1.75. It went on and has stayed on tight for two weeks now, no oil leak either :)
 
by any chance does anyone have the bolt size for the CV axle, passenger side? the 5 bolts that bolt the inner joint to the trans
 


TheOtherNick said:
Feel free to add more stuff I got most of the common stuff.

dog bone=15mm
fender brace=13mm
supercharger=10mm, one 13mm
tb=10mm, 2 8mm on the support bracket for n/a cars
egr=13mm
egr tube bolts=3/2"
valve cover=3/8
alt bolts and nut= 15mm
map bolts=10mm
water pump pulley=8mm
front cover and water pump 10mm and 13mm
crank bolt=15/16
rear cover=3/8
oil pan 3/8
head bolt= 5/8IIRC
head stud nut= 1/2" 12 or 6 point
x over nuts= 13mm
starter bolt=15mm
starter batter pos nut=13mm 14mm on some after market
starter relay wire=10mm
p/s pump=13mm
tensioner pulley=15mm or t55 torx
icm bracket=15mm
cam bolt= 1 1/16" or 24mm IIRC
torque converter bolts=18mm
transmission bell-housing bolts=18mm
rear engine to trans bracket bolts=13mm
axle nut 32-36mm depending on year and axle manufacturer
strut to knuckle bolts=21mm
ball joint nut=18mm 19mm on some aftermarket
strut top nuts 15mm
front sway bar bushing clamp bolts=15mm links 13mm-15mm depending on manufacturer
rear sway bar link nuts=18mm, 15mm on back to hold the ball
manifold bolts 13mm
02 sensor= 7/8"
icm harness bolt=7mm
Lim bolts=3/8"
front hub bolts=1/2"
rear hub bolts=10mm
blower motor/blower resistor 7/32"
small dash bolts=7mm larger ones 13-18mm
Seat bolts=T60 torx IIRC
headlight mounting bracket bolts=10mm(2)
Click to expand...

yes it its held onto the shaft with a c-clip. just use a pry bar and push on the back of the axle, rotate and try again if it doesnt pop right out.

good how to: Installation of new Half-Shafts
 
Awesome - I was about to look up the torque specs for the knock sensor again when I came across this! Thanks!
 
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