Ford Flathead Engines: How to Rebuild & Modify

Michael Herman · Tony Thacker

Jul 2016 · CarTech Inc

About this ebook

Although not the first V-8 engine ever produced, Henry Ford's side-valve V-8, launched in 1932, certainly qualified as the first mass-produced V-8 sold to the public. Because of Henry Ford's stubbornness, the first versions were less than ideal. The technology was in its infancy and cost-cutting measures limited the output and reliability of the early models. Over time, however, the "Flattie" became the go-to powerplant for a whole generation of new hobbyists who were called "hot rodders." The engine maintained its position in the hobby well into the 1950s, even when more modern overhead-valve designs started coming out of Detroit. It's hard to overstate the impact that this simple little engine had on a whole generation of enthusiasts. Even today, people choose a flathead for period-correct builds over far more powerful options. The style and sound of a modified flathead is an iconic part of American history.

In Ford Flathead Engines: How to Rebuild & Modify, veteran author Tony Thacker and flathead guru of H&H Flatheads, Mike Herman, take you step-by-step through rebuilding a vintage flathead. One of the most important steps is to actually find a good, usable core; many have been sitting for a very long time and the engine design is prone to cracking. Running changes are also an important consideration when selecting a core, and include cooling system, ignition, and transmission mount. After you have selected a core, Thacker and Herman take you through the entire process of a rebuild, including teardown, parts inspection, machine shop processes, replacement part selection, re-assembly, start up, and break-in. 

Also covered is a unique performance build completed at the H&H shop for legendary race car team manager and all-around enthusiast Ray Evernham. It all adds up to more than 500 color photos and insider tips on building what could be called the most iconic engine ever built, the Ford flathead V-8.

About the author

Mike started out at H&H Flatheads in about 2000. Mike's grandfather, Max Herman, and his father, Max Herman II, started the company in their current location in 1972. They began rebuilding T, A, B, and V-8 flathead engines; their reputation continues worldwide. Since Mike took over the V-8 flathead side of the business in 2002, he has built and shipped more than 1,200 engines, about two every week. Tony Thacker really admired his drive, energy, and marketing savvy because Herman always worked hard to get the H&H name to the forefront.

Even in the early days, Mike was quick to see the potential. As industry founders such as Barney Navarro, Al Sharp, and Ken Austin retired from active business, he purchased their assets and diligently put their innovative products back into production. In most cases, where he could, he used the original pattern makers and the original foundry’s plans. And, although his degree is in marketing, he knows every job in the shop from sweeping the floor to machining the blocks, a work ethic instilled by his knowledgeable father.

Tony was born in England, but he soon learned to love American Iron. Eventually, he made it to the sunny state of California, where he worked as editor of SEMA news. After eight years and several titles at SEMA, as well as authoring several books, Tony wanted to realize his dream and start his own publishing company. At least until a call from Alex Xydius caused him to shelve the books and become marketing director for the legendary So-Cal Speed Shop. From there, the call of the NHRA Museum came, as well as setting records on the salt flats, and Tony finally wrapped up his professional career by opening an education museum in the Portland area called the World of Speed. However, he is far from being retired and is as busy as ever consulting for a number of clients and back in front of a computer working on his first love, some book projects.