Where can you find cylinder head torque specs?
The torque specifications for automobile engine cylinder head bolts are located on the Federal-Mogul Motorparts website. The search feature is available on the Specifications Lookup page under the Technical Info heading of the main page.
Why are torque specs important for head gasket?
Manufacturers provide torque specifications to guide mechanics in properly tightening the bolts connecting the cylinder heads to the main engine. Improper tightening of the bolts on a cylinder head results in uneven distribution of tension across both the bolts and the head gasket.
What does torque mean on a head bolt?
A crucial component of engine building is setting the torque on head bolts. Torque refers to how tight a bolt should be. When setting the torque, reliance on the specifications set by design engineers is vital. One essential tool you must have is a good quality torque wrench. Without one, you are like a ship without a compass at sea.
What are torque specifications for SAE and metric fasteners?
Service Manual Supplement July 2016 Fastener Torque Specifications 4 SAE and Metric Fastener Torque Specifications SAE Plain and Zinc Plated Hex and Socket Head Cap Screws TORQUE CHART – SAE PLAIN AND ZINC PLATED HEX HEAD AND SOCKET HEAD CAP SCREWS Grade 2 or 5 hex head with Grade A nut Grade 5 hex head with Grade 5 or higher nut DRY LUBED DRY
What are torque specifications?
Torque specifications are for dry threads only. The fastener threads should be free of oil, dirt, grit, corrosion, etc. The hardware should turn freely without binding when tightened by hand. It is important NOT to lubricate hardware threads or seats. The friction at which torque is measured against should come from the hardware seats.
What are the torque specs for Chevy 350 heads?
The specifications given are for the typical 350 engine. The Chevrolet 350 cylinder-head torque specification is 65 ft.-lbs. The intake installed onto cast-iron heads requires 30 ft.-lbs.
What is head bolt torque?
Head Bolt Torque. Head bolt torque refers to the amount of rotational force that must be applied to the cylinder head bolts for a safe and secure connection either to the engine block or another cylinder head depending upon the engine.