How do you torque aluminum heads?

How do you torque aluminum heads?

Torque to 70 ft/lbs. for 7/16″ bolts or studs (289 or 302) or 100 ft/lbs. for 1/2″ bolts or studs (351W) in three or four steps following the factory tightening sequence. Then tighten the long (upper) head bolts or studs to 80 ft/lbs.

How do you torque a 350 head bolt?

The tightening of Chevy 350 cylinder head bolts must always be done in a helical sequence, starting from the center bolt and working outwards in a clockwise spiral. It’s best to first tighten all the bolts to 25 foot-pounds, then 45 foot-pounds and finally 65 foot-pounds to maintain uniform pressure across the head.

How do you install a SBC cylinder head?

How to Install Small Block Chevy Heads

1. Wipe the block and mating surface of the head with alcohol or carburetor cleaner to remove any remaining grease or oil.
2. Install the head gasket with the right side up and all the way down on the locating pins.
3. Install the heads carefully, locating them on the locating pins.

How hard is it to change a cylinder head?

Answer: it depends on whether you are doing it yourself or have taken the car to a cylinder head repair shop. As a DIY project, cylinder head replacement time can be several hours. Question: how do you remove a stuck cylinder head? Answer: a cylinder head may be difficult to remove due to tightly mounted bolts.

What is the best small block Chevy head?

1. Flotek 102505 Cylinder Head – Best Overall.
2. Dart 127121 SHP – Best SBC Head for Torque.
3. Edelbrock 5073 – Best Stock SBC Head.
4. Edelbrock 5089 – Best SBC Head for Drag Racing.
5. Edelbrock 5087 E-Series E-210 SBC – Premium.
6. DNA Motoring CYLH-SBC-350 – Best Budget.
7. Speedmaster PCE281.
8. 350 Chevy Heads – Best and Worst.

What size heads for 383?

A 383 that will see 5000 rpm max, a 170 ccc head will work just fine. A 383 that want to go to 7000 rpm then 210 cc head is what is needed.

What cam should I put in my 383 stroker?

You will need at least 4.11 gears and a 3000 stall to run a cam in the 240-250 degree range. You should limit the cr to 10.5:1 with a cam and gear and stall as I listed above. A stock converter and 3.08 gears would like a 9:1 cr 383 with a cam with 205 to 210 degree at 0.050″.

What do I need to build a 383 stroker?

How to Build a Budget 383 Stroker Chevy Engine

1. Start with any small-block 350 engine, preferably four-bolt main.
2. Purchase any one of the several 383 stroker crankshaft/rod/piston kits on the market.
3. Acquire a set of new or used, fully assembled L31 GM Vortec cylinder heads.

How much horsepower does a 383 stroker engine have?

The 383 stroker engines have been reported to achieve 330 horsepower with 410 foot-pounds of Torque, 395 horsepower with 410 foot-pounds of Torque and 395 horsepower with 410 foot-pounds of Torque.

What kind of gas mileage does a 383 stroker get?

Around-town gas mileage is about 14 – 16.

What cars came with a 383 stroker?

Some common applications for this engine are the classic Chevy Nova, Chevy Camaro, and almost any other classic Chevy body. The creation of the Chevrolet 383 Stroker was born out of creativity.

What is the torque specs for ARP head studs?

ARP Head Studs, Main Studs, Rod Bolts Torque and Stretch Specs

U.S. STANDARD TORQUE VALUES Recommended Torque to Achieve Optimum Preload (Clamping Force)
Fastener Tensile Strength	170,000/180,000 PSI (1,171 Nmm2)	220,000 PSI (1,515 Nmm2)
5/8″	210	270
6mm	11	15
8mm	24	32

How many times can you torque ARP head studs?

Generally bolts/studs that have a specific torque value to tighten to are reuseable, but bolts that you torque then turn an extra 1/4 turn or a number of degrees are torque to yield bolts and shouldn’t be reused more than once.

What is an undercut head stud?

With a proper undercut head stud, they are shaped through forging and are thinner in the stud area. Even after the threads are rolled, the stress is evenly distributed through the whole stud. Thus, even though they are thinner, they are stronger then a regular stud.

What are head bolts made of?

The most common high-grade material is medium carbon alloy steel that is used in making SAE J429 Grade 8 bolts. These bolts are often used by OEMs in high stress applications and in some racing applications and are rated at 150,000 psi tensile and 130,000 psi yield with a proof load of 120,000 psi.

Can I reuse my ARP head studs?

Are ARP bolts and studs re-usable? Yes. As long as the fasteners have been installed and torqued correctly, and show no visible signs of damage, they can be re-used. If they show any signs of thread galling or corrosion, they should be replaced.

Why are ARP head studs good?

Studs are typically considered better because they’re less likely to twist while being torqued. This lack of twist, compared to bolts, yields a more consistent torque loading. Bolts are less expensive and easier to use in installations where there are clearance issues that would preclude studs.

What is the strongest bolt material?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi.

Are stainless bolts stronger than Grade 8?

Stainless commonly comes in grades 18.8 (304) or T316. Stainless steel bolts are rated for corrosion resistance. A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000.

What is the metric equivalent to Grade 8?

Metric Bolt Conversion

Metric Nut Class	SAE J429 Normally Used	ASTM Grades
5.8	5	.
8.8	8	A325,A449
9.8	9	A193,B7 and B16
10.9	10 or 12	A490,A354, Grade 8D