Torque-to-Angle/Yield Threaded Fasteners
All the original equipment manufacturers (OEMs) have fastener labs with lots of sophisticated equipment and well-educated people working on fastening issues. They even have their own professional association – The Bolting Technology Council – which holds meetings and seminars about fasteners. I’m not a fastener engineer, and I’m not going to make you into one.
Threaded Fasteners Torque-to-Yield and Torque-to-Angle
All the original equipment manufacturers (OEMs) have fastener labs with lots of sophisticated equipment and well-educated people working on fastening issues. They even have their own professional association – The Bolting Technology Council – which holds meetings and seminars about fasteners. I’m not a fastener engineer, and I’m not going to make you into one.
Engine Cylinder Bore Surface Finishes
What’s the best type of cylinder bore finish for today’s engines? Most would say it’s a finish that allows the rings to seat quickly and completely so the engine doesn’t use oil. For many applications, that may mean a plateau finish. The surface finish must also meet the piston ring manufacturer’s specifications and have the
Rebuilding the Chevrolet LT1 Engine
Compared to the 1991 Chevy 350 L98 with TPI, the LT1 made 20 percent more horsepower, got better fuel mileage, and had a much broader torque band with 90 percent of its peak torque available from just over 1,000 rpm all the way up to nearly 6,000 rpm. GM Powertrain accomplished all of this by
Understanding Today’s Machine Coolants
Many types of grinding and honing operations require the use of a "process fluid" for cooling and lubrication. Remanufacturing procedures such as crankshaft grinding and surface grinding generate a tremendous amount of heat and require a fluid primarily for cooling. Heat control is absolutely essential for a good finish and accurate tolerances. Use of a
Rebuilding the Chevrolet LT1 Engine
Although it shared many common dimensions, looked much the same and even had a few common parts, it was totally redesigned to provide more power with lower emissions and better fuel economy. Compared to the 1991 Chevy 350 L98 with TPI, the LT1 made 20% more horsepower, got better fuel mileage, and had a
Valve Stem Seals
Valve stem seals play a critical role in controlling valve lubrication as well as oil consumption. If the seals do not fit properly or are not installed correctly, the guides may be either starved for lubrication or flooded with oil. Either way, the engine is going to have problems – and you’re going to have
Caliper Clinic: Defective Parts, If Not Monitored, Can Easily Strip A Company Of Its Profits
Defects exist in almost all products. Preferably,defects are found and corrected prior to shipment to the customer.However, on occasion a defect can be overlooked and end up inthe customer’s hands. Not all defects result in an unsafe condition.But even a product that is boxed or labeled incorrectly can leavethe customer with a sour taste in
Cylinder Bore Honing: Main Objective When Refinishing The Cylinders
When an engine is rebuilt, the cylinders usuallyneed attention. Wear tends to create taper in the upper part ofthe cylinder that can reduce ring sealing and increase blowbyand oil consumption if not removed. The cylinder may also be outof round, scored or have other damage that requires correctingbefore a new set of rings will seal
Why Parts Get Coated
I never would have believed you could get those kind of resultsfrom a glorified paint job. With those words, another skeptic(in this case, a NASCAR Winston Cup engine builder) had come toaccept the value of special coatings applied to engine components. At the time, such skepticism was not totally unwarranted. Likeany emerging technology, the coating
Valvetrains: Better Materials & Design
Pushrods would seem to be an endangered species these days, atleast as far as most new engine designs are concerned. The onlybrand new engines built in recent years with a pushrod valvetrainhave been Chrysler’s 8.0L V10 for the Viper and Dodge Ram, andGeneral Motors new "LS1" 5.7L small block V8. All therest have either been
Extending Hd Clutch Life: Proper Analysis Is Critical For Evaluation Of Manufacturing Process Control
Proper analysis of failed clutch componentsis critical for evaluation of manufacturing process control, productlife expectancy and warranty analysis. Rebuilt products whichare application and installer sensitive are easily blamed forfailures which may actually be the result of an installation error,poor maintenance procedures, or an improper application identification. In the evaluation of failed heavy duty clutches,the majority
Rebuilding The Chrysler Engine Family
Much of the information used to write thisarticle was provided by Bruce Chapman, president, and the employeesof Ontario Reman, Etobicoke, Ontario, Canada. Ontario Reman isan authorized Chrysler engine rebuilder selling remanufacturedengines and small parts to Canadian Chrysler dealers. We thankthem! Chrysler introduced a whole new family of 60degree V6 engines beginning with the 3.3L OHV
Ensuring Bearing Life: Crankshaft Bearings Are Always Replaced When Rebuilding An Engine
Crankshaft bearings are always replaced when rebuilding an engine because they’re a wear component. Heat, pressure, chemical attack, abrasion and loss of lubrication can all contribute to deterioration of the bearings. Consequently, when an engine is rebuilt new bearings are always installed. “Reading” the old bearings can reveal a great deal about conditions that may
Piston Rings and Surface Finish
Horsepower is always paramount in the minds of customers who salivatelike a Pavlovian dog when the terms "high performance"and "engine" are used in the same sentence. Unquestionably,horsepower is heady stuff, capable of not only moving a vehicleto obscene speeds, but also of propelling its owner to a positionof prominence in the eyes of performance enthusiasts
Rebuilt Market Reviews – Engines Market
Total engines remanufactured by all production engine remanufacturers (PERs) in 1995 increased a modest 3.5%, growing to 1.318 million units last year compared to 1.273 million units produced in 1994. Production totals are based on a U.S. and Canadian universe of 120 PERs that produced an average of 10,609 remanufactured engines annually in 1995. Survey
Valve Guide Repair Options
One thing you can almost always count on when rebuilding a cylinder head is worn valve guides. The guides experience a lot of wear because of the constant friction between the guide and stem. To make matters worse, positive valve seals on late model engines prevent the guides from receiving much lubrication. Side forces on
Making Power From Big Block Fords
As noted last month, the first part of a big block Ford power program is to select the appropriate components and machine them properly. Part two entails coordinating the camshaft and valvetrain with an engine’s intended use, and then bolting everything together using proven high performance techniques. According to high performance Ford specialist Norm Wizner,