Cylinder Head Crack Repairs
It seems as if many cylinder heads are doomed to crack from the very start because of their lightweight construction and design. Aluminum overhead cam (OHC) heads, in particular, are often found to be warped as well as cracked. But so too are many pushrod cast iron heads. One of the causes of cracking in
Coretalk: Sunnen, RMC Form Strategic Alliance To Market Equipment
This Sunnen/RMC alliance is effective immediately. RMC products will be sold under the Sunnen/RMC brand. Sunnen’s team of field engineers and service specialists will now represent and support the RMC line. “The new Sunnen/RMC branded products complement Sunnen’s existing product line,” said Mike Haughey, Sunnen’s chief operating officer. Ray Meyer, president of RMC, agreed: “The
Performance Pistons
Piston manufacturers are introducing new performance pistons for all of these applications as well as refining existing piston designs to reduce weight, and improve strength, durability and ring sealing. Piston design and manufacturing used to be a relatively low-tech process. Now, with the aid of finite element analysis and other computer modeling techniques, many aftermarket
Shop Financials: Automotive Technology Isn’t All Under The Hood
Like our cars, many of us take our computer systems and networks for granted. Once they are installed and working, we tend to forget about scheduled maintenance and security. Since most of the services that our companies require are on the Internet, we are forced to get access to stay current with technology. When on
Crankshafts:Stock and Performance
The crankshaft is the working arm of the engine. All the force generated by combustion and the downward motion of the pistons is focused on the crank throws. The leverage effect of the force exerted on the crank journals twists the shaft and converts the up-and-down reciprocating motion of the pistons into rotational motion of
Gessford Machine, 2004 Machine Shop of the Year
If you asked a roomful of people to make a list of the 20 most exciting cities in the world, you would probably find New York, London, Paris, Rome and Beijing on every list. While the exact order and final tally of cities might vary, it’s unlikely that Hastings, NE, would even be mentioned. But
Coretalk: AERA EXPO 2005 Set For Las Vegas Hilton In April
The EXPO will showcase leading edge technology with live, operating demonstrations of equipment, tools, supplies, parts and services. Exhibits will be open on Thursday, April 28, from 10:30 am-6 pm; Friday, April 29, from 10:30 am- 6:30 pm; and Saturday, April 30, from 10:30 am- 2:30 pm. EXPO will include a keynote address from NASCAR
Piston Ring Technology: Stock and Performance
Piston rings have one of the toughest jobs inside an engine. They’re slammed up and down between the ring lands thousands of times a minute; they’re subjected to searing temperatures and extreme pressures; and they’re constantly scraping back and forth against the cylinder walls. In spite of all of this, the rings are expected to
Not So Stock: NASCAR Motors and Their Street Counterparts
The engines in NASCAR’s newly introduced Strictly Stock class of stock car racing in 1949 were literally stock, right off the dealer’s showroom floor. Today, they’re anything but. So what happened? Evolution. Like any sport or industry, evolution has moved NASCAR racing to where it is today, a multi-million dollar business. The engines, called ‘motors’
The Angle On Valve Seats
Valve seats seem to be a fairly simple engine component but they play a critical role in sealing compression and cooling the valves. When a seat becomes worn, it may leak compression and allow the valve to run hotter than normal. The same thing can happen if the seat is out-of-round or has lost its
Topline Automotive Buys, Reopens Hylift Facility, Engine Builder, August 2004
A full-line of flat mechanical tappets, lash adjusters and encapsulated hydraulic roller lifters are again being produced by the original Hylift machines and team. The previous Hylift OE lines that were in Zeeland, MI, have now been relocated to the Muskegon plant. “The same people who made ‘The Beautiful Lifter’ are back manufacturing with precision
Crankshafts and Bearings – Keeping the Relationship Strong
Today’s engines typically have very tight tolerances everywhere and the crankshaft bearings are no exception. The truer the crank is in its alignment with the mainline and cylinder bore, the tighter the tolerances can be. Bearings and mainline bores must be very precise because during operation the crankshaft is not actually straight: it is elastic.
Researching the Rebuilding Market for Multi-Valve Cylinder Heads
Cylinder head work has provided a good income for many of our readers over the years. All engines eventually need a valve job and guide work if they accumulate enough miles. Head work may also be needed if an engine overheats and blows a head gasket, if the head develops a crack, or an OHC
In Search Of New Markets, Mike Jeffries
Looking for new markets is one of the toughest things we do, so every time the phone rings we listen for an opportunity. Most of what we find is suspect, but over the past 12 months we have rebuilt a number of compact diesels and sold a number of rebuild kits. As a result we
Removal Tricks For Broken Ford Flathead Bolts
First, the flathead design means head hardware is exposed at all times to weather and coolant so corrosion results. Second, several bolt holes in the block on both sides (between cylinders) crack. It’s rare to find any of them NOT cracked and experience says that although these cracks do not create a problem that would
The New Sport Compact Market
The most popular nameplates are imports such as Honda, Acura and Mitsubishi, but coming on fast are Nissan, Toyota, Mazda, Subaru and Volkswagen – plus domestic models such as Ford Focus, Dodge Neon and even Chevy Cavalier. Nobody is abandoning the small block Chevy or any of the other V8s that have traditionally been the
Align Yourself
The crankshaft main bores are the foundation of every engine block. The alignment of the main bores is important because their position establishes the centerline of the crankshaft and how the crank aligns with the cylinders, deck surfaces and camshaft. Misalignment in the main bores can cause binding and premature main bearing wear. Misalignment occurs
Valve Seat Installation Procedures
If a valve seat is damaged, cracked, loose, receded or too badly worn to be recut or reground, it can cause a variety of problems: loss of compression, valve burning, valve failure, valvetrain wear and breakage, even head and valve damage if the seat comes loose. For that reason, replacing valve seats is often necessary
Repairing a Rod Journal on a Callies Aftermarket Forging
During more than 30 years in my small but comfortable shop, I have repaired thousands of crankshafts by welding. One thing I have learned in that time is that when a customer brings a crank to be repaired, you must take note of exactly what type of crankshaft you will be working on. Many of
The Properties Of Cast Iron
The reality is that much of what you understand and have been taught about welding cast iron may be incorrect. Cast iron is not used because it’s cheap, but because it has very good properties and works extremely well as the metal of choice for many engine blocks and cylinder heads. Cast iron has gotten