I have almost everything I need to start my 4 barrel and header conversion. I started looking over the studs and hardware on my 225's head. I do not feel comfortable with keeping the old studs and risking snapping them when I torque the bolts, my header instructions indicate 26 ft lbs of torque. I have never removed studs on a slant 6 head before. Therefore besides hitting them with PB blaster for 3 days in a row, what other things should I consider?
If I put 2 nuts on each stud will that work for getting them out?
Also I have 2 new expansion nuts for the end bolts, what should I use for the rest, grade 8 nuts?
I also need to buy grade 8 threaded studs, I am not sure what size and thread pitch they are. I wanted to buy these before starting.
Hello cchrishefish,
Found this chart a wile ago on the intra web. Not mine but may help you and others.
Stay safe,
Happy Mopar
Arron.
Bolt Size and Tightening Information � 170, 198 & 225 Slant Six Engine
Fastener Location Thread Size,Torque (ft. lbs) Wrench Size Under head length (inches)
Connecting Rod bolt / nut * 3/8-24, 45 9/16 9/16 Thk. Nut
Cylinder Head Bolt * 7/16-14, 70 11/16 4.3 (Cast Iron)
Main Bearing Cap * 1/2-13, 85 3/4 3.0 (Cast Iron)
Camshaft to Timing Gear* 7/16-14, 35 5/8 1.4 ARP 155-1002
Timing Chain Cover Bolts ^ 5/16-18, 200 in.lbs 1/2 .6 (Auto. Trans Pan Bolt)
Engine to Trans. Bellhousing (4) 3/6-16, 30 9/16 1.5 (frontside bolt is 1.75)
Engine to Trans. Bell, Bottom(2) 7/16-14, 35 5/8 2.0
Trans. Brace to Trans. Bell ^ 3/8-16, 25 9/16 1.0
Trans. Brace to Engine Block 7/16-14, 35 5/8 1.0
Rear Main Seal Retainer ^ 3/6-16, 30 3/8, 12pt. 3.0 (Small 9/16 dia. Head)
Valve Cover Bolts ^ 1/4-20, 40 in.lbs 7/16 .5
Distributor Clamp ^ 1/4-20, 95 in.lbs 7/16 .5
Engine Mount to Frame Nut 1/2-13, 85 3/4 .6 with captive washer
Engine Mount Bracket to Block 7/16-14, 45 5/8 1.5
Flywheel to Crankshaft 7/16-20, 55 5/8 .875 (5/8 thick head)
Flex Plate to Crankshaft * 7/16-20, 55 3/4 .5 ARP 200-2903
Flex Plate to Converter * 5/16-24, 270 in.lbs 9/16(short) .450 ARP 240-7301
Fan Attaching Bolts^ 5/16-18, 200 in.lbs 1/2 Length based on spacer
Fuel Pump Attach Bolts ^ 3/8-16, 20 9/16 1.5
Bellhousing Bottom Cover ^ 5/16-18, 7 1/2 .6 (Auto. Trans Pan Bolt)
Alternator Bracket to Block (2)^ 3/8-16, 30 9/16 1.25 (1 bolt 5/16-18 x 1.5)
Alt. Adj. Strap to Head^ 3/8-16, 20 9/16 .5
Intake to Exhaust Manifold (3)^ 5/16-18, 240 in.lbs 1/2 3.0 min.
Manifold set to Head Studs ^ 5/16-18 x 1/2, 5/16-24 x 3/4, 1� total, use sealer into head
Oil Pan Drain Plug^ 1/2-20, 20 7/8 .5
Oil Pan Bolts (6 longer @ ends)^ 5/16-18, 200 in.lbs 1/2 .6 (Auto Trans Pan Bolts)
Oil Pump Mounting Bolts ^ 5/16-18, 200 in.lbs 1/2 1.625
Starter Mounting Bolts 7/16-14, 40 5/8 1.5 ( Locating Stud Used)
Water Pump to Block ^ 3/8-16, 25 9/16 1.5 (2 Bolts @ 2.5 Long)
Thermostat Cover ^ 3/8-16, 20 9/16 1.0
Vibration Dampener Bolt (Press) 3/4-16, 135 1 � 2.3 (1.5 Min. Thread)
^Indicates reference torque only. �Common sense� hand tool tighten, no torque wrench req.
*Indicates fasteners that have an ARP p/n for a premium quality repacement fastener.
This chart is provided for fastener size and aftermarket replacement fasterner cross-reference. Torques are for reference only.
Fastener installation is application specific, good machining and fastener installation practices must be followed.
Copeyright, 2002 - Doug Dutra, all rights reserved
