Torque Tables
Torque TablesTM
Complete Cylinder Head Torque Specifications for Domestic and Imported Passenger Cars and Light/ Medium Duty Trucks
VEHICLE SEALING
When you consider what can go wrong when even "minor" gaskets fail, you realize one thing: THERE ARE NO UNIMPORTANT GASKETS! Each one, no matter how small, plays a critical role in vehicle sealing. Each has to be the best. That's why you should be... 100% Fel-Pro.?
Why trust Fel-Pro gaskets for ALL of your vehicle sealing needs?
? The undisputed sealing technology leader ? Engineered for the repair environment ? Molded rubber chemistry and
manufacturing expertise
? Global engineering resources ? Latest technology across every
gasket repair category
DRIVETRAIN
FUEL SYSTEM
ENGINE REPAIR
COOLING SYSTEM
EXHAUST SYSTEM LEAK REPAIR
Engine Repair
Fel-Pro? offers comprehensive coverage of virtually every engine repair opportunity, from complete rebuilds to the replacement of a single gasket or seal. In addition, Fel-Pro offers the best gasket material and design for each application to ensure a perfect seal the first time, every time.
Engine Repair Technologies:
? PermaTorqueMLS? ? These head
gaskets provide the correct design for MLS-equipped vehicles and feature a unique aftermarket coating that accommodates less-than-perfect surface finishes.
? PermaTorque? ? The industry
standard for no-retorque head gaskets features premium coatings, facings and combustion armors.
? PermaTorqueSD? ? Severe-duty
head gaskets engineered for extra strength under punishing conditions.
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Understanding Torque-to-Yield Head Bolts
T-T-Y head bolts are particularly common on engines using aluminum heads and/or multi-layer steel head gaskets. These bolts are engineered to stretch within a controlled "yield zone". Once they reach this zone, they spring back to provide a precise level of clamping force over the entire area of the gasket. It's important to carefully follow the manufacturer's tightening specification. Once T-T-Y bolts are stretched beyond their yield zone, they become useless. Typically, T-T-Y bolts are torqued to a specified limit, then again with an additional partial turn to reach the bolt's yield zone. It is recommend to never reuse a T-T-Y head bolt. Chances are too great that it has already exceeded its elasticity barrier and won't spring back to properly seal the engine.
II
Importance of Proper Torque
When a head gasket is installed between the cylinder head and engine block, tightening the head bolts compresses the gasket slightly, allowing the soft facing material on the gasket to conform to the small irregularities on the head and block deck surfaces. This allows the gasket to "cold seal" so it won't leak coolant before the engine is started. The head gasket's ability to achieve a positive cold seal, as well as to maintain a long-lasting, leak-free seal depends on two things: its own ability to retain torque over time (which depends on the design of the gasket and the materials used in its construction) and the clamping force applied by the head bolts. PermaTorque? head gaskets are made with top-quality materials and designed to remain resilient so they retain torque, so no retorquing is necessary. (Some competitive head gaskets alleged to be "no retorque" can lose as much as 50 to 60% of their original torque after only 100 hours of service.)
Competitive Head Gasket:
PermaTorque? Head Gasket:
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