The 216-cube Chevrolet inline-six is the less-favored little brother to the vaunted 235, but that is no reason to put it out to pasture before its time. Davin saw potential in the 216 from our recently unearthed 1950 Chevrolet 3600, and thus, it got resurrected in the latest episode of Redline Rebuild.

“This truck just oozed cool when I first saw it. The potential was there and it really looked to be worth saving,” Davin said of the project when it arrived at the shop.

One of the key features that makes this truck stand out in a crowd is the extra rear quarter windows that are unique to trucks of the late-’40s to mid-’50s era. Chevrolet initially marketed these relatively small chunks of glass as “Nue-View rear corner windows.” The goal was to increase rearward visibility, but the side effect was that it made the truck timeless and unique.

With those awesome looks, many would consider it a bit of a disservice that this truck got saddled with the 216-cubic-inch inline-six engine. The fact the small-block V-8 was still half a decade away meant this engine was the most stout and sensible option of its time. I must admit, my gut reaction when I first learned of Davin’s intention to rebuild the 216 was that he should just swap it out for a 235.

After all, the 235 is extremely similar to the untrained eye, but it has a handful of improvements compared to the 216. For example, the mixture of bearing materials in the rotating assembly—in the 216, the main bearings are standard modern insert while the connecting rods are poured Babbitt, whereas in the 235, it’s all insert bearings. Luckily, Davin learned a bit about Babbitt bearings while he was elbow deep in the the last Redline Rebuild of our Swap-to-Street Ford Model A.

The bearings were hardly a hurdle, but when the cylinder head went to the machine shop only to reveal that every combustion chamber had at least a hairline crack headed towards the water passage, we had to pause and consider our options. This is a common failure point on the 216, and luckily the cracks in this particular engine were not to the point where Davin needed to source another head. Instead, he elected to ceramic coat the interior of the water passage to keep combustion pressure from pushing all the coolant out of the radiator.

“It was very similar to many of the engines I have rebuilt for this series, yet it had some really unique points as well. It was a fun challenge and awesome to save the 216 rather than drop a 235 in,” Davin says.

After the Thriftmaster 216 is assembled, it will be settled into the heavily worn 3600 pickup, which will have a new, less-perforated metal floor. Davin has a vision for what this truck will do—to find out more about this workhorse’s future, subscribe to Hagerty’s YouTube page.

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The Redline Rebuild Chevrolet Stovebolt inline-six is fresh out of the paint booth and ready for assembly. There is more to the process than threading bolts into sandwich gaskets, though. With the latest Redline Update comes a look into the process of engine assembly.

It is a joke in the car world that if you take something apart, 50 percent of the restoration is done; but that’s such a good joke because it’s so comically wrong. However, some take that saying as fact, and anyone in that situation has a solid reality check the first time they attempt to finish a project. Doing things properly takes time and getting wrapped up in the excitement of the finished product can’t distract from getting it right the first time. Our own Davin Reckow is not exempt from this rule.

“Even I can get caught up in the vision of the finished engine back in the car and how good that is going to look,” Davin says as he re-arranges the freshly painted parts on the large tables when I visit him during assembly. “It is such a fun time to be assembling the fresh parts, but I always have to stay sharp to not get excited and overlook anything.”

It’s a lesson that applies to every automotive project and not just to engine assembly. Rather than stress about it though, lean back and let Davin talk you through assembling this timeless inline-six. Be sure to subscribe to the Hagerty YouTube channel to receive a notification with each video that goes live—including the full Redline Rebuild time-lapse of this engine.

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The Stovebolt inline-six is long departed from our 1950 Chevrolet pickup, and now we’ve dropped off Davin and the parts at the machine shop to see just what we’re dealing with. As the latest Redline Update reveals, while the block needs minimal resurfacing, the cylinder head puts Davin in a conundrum.

The block—the backbone of the engine—cleaned up well. The boring machine skimmed a select amount of material off the cylinder walls to help refresh the compression, and the whole chunk of iron was cleaned and degreased a few times over in prep for the trip to the paint shop.

Next up, the cylinder head. This was an area Davin wasn’t excited to explore this time. His research during teardown of the block indicated the 216’s cylinder head design has a nasty habit of cracking on a tight radius in the combustion chamber.

“At first glance I thought it was an odd design, but with more research it turns out it is quite a pain-in-the-butt design,” Davin says, while eyeing the parts from across the room. “I can see why so many people skip over rebuilding these 216s and just go to the 235.”

It is clear now just what Davin got himself into, but given how this pickup will be used once it’s completed and the current state of the cracks, the fix is actually quite simple. Rather than pre-heating and welding the relatively small cracks, a ceramic coating is poured into the water jacket of the block. This creates a second barrier to prevent combustion pressures from getting into the coolant passages should the cracks get worse.

With all the machine worked wrapped up, it’s time to literally wrap the parts up and head for the paint booth. Davin spends a few hours of prep work before everything is rolled into the booth and sprayed with the proper battleship gray hue.

With all the parts properly coated with color, there’s just one step left—put the engine back together, coming up in the next Redline Update. If you want to be sure not to miss a single blot of Loctite or click of the torque wrench, subscribe to the Hagerty YouTube page to receive notification as each video goes live.

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The 1950 Chevrolet 3600 pickup has lost its engine, and the inline-six is now ready to be pulled apart. Davin barely had the engine bolted to the stand before he reached for the tools, but luckily, we delayed him long enough to explain the tear-down process to us in the latest Redline Update.

Despite some cleaning, the dirt and corrosion in this engine reveals its many years of work. The hardware didn’t put up much of a fight, but Davin elected to use the oxy-acetylene torch to heat up the bolts holding the intake and exhaust manifolds to the cylinder head as a preemptive measure. Better the extra step now than reaching in the tool chest for the EZ-Outs later.

Even with a little extra caution during teardown, this engine came apart quickly. Looking at the parts on the table, Davin reflects on a few of the things that stand out in his V-8-oriented mind.

“The cylinder head is a really weird design to me,” he says, eyeing the long lump of cast iron on the table. “It looks like they took an L-head design from a flathead and folded it up to make it fit on top.”

True, if you look inside an engine designed for efficiency, you won’t see a flow pattern like that. However, efficiency was not Chevrolet’s initial plan with the 216’s straight-six ancestor. The sales pitch for those initial straight-six engines was “a six for the price of a four,” a slogan that sold the additional cylinder count to those cross-shopping against the smaller, less powerful, and rougher-running engine of the late 1920s and early 1930s. The heritage stuck around and might explain why the valve cover decal Davin uncovered on the 216 was “Thriftmaster.”

With the engine block empty and the worktables full, the next task is to load up select bits and head to the machine shop—a trip that will be covered in the next Redline Update. Be sure to subscribe to Hagerty’s YouTube channel to receive updates with each video that goes live so you never miss a new update.

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The 1950 Chevrolet 3600 pickup set to donate its heart to the Redline Rebuild garage put up a fight simply to leave the spot where it was slowly returning to the earth. So you might be surprised to hear that Davin immediately wants to see if the straight-six will run, with minimal time investment. It’s in the shop—so why not, right?

“This series of engine is known to be durable as all heck,” says Davin. “It looked pretty complete and nothing I saw on first glance said it shouldn’t run. Seemed like a fun thing to try.”

Luckily, he takes us along for the adventure of getting the long-decaying engine turning again. After creating some space by removing the radiator and hood, Davin pops the hood off. With a fresh six-volt battery in the battery box, a push of the start button actually brings motion.

Fresh plugs replace the tractor plugs in the cylinder head, and, while the plugs are out, the cylinders get a quick shot of PB Blaster to break up any accumulated rust. Of course, to find out whether the electrical system is healthy enough to throw a hot spark, Davin connects the coil while cranking the engine. Unfortunately, the first time he connects the power to the coil, he uses his right arm as a conductor. Ouch.

“I don’t know what’s worse about shocking myself then—that I did it, or that I know it’ll happen again at some point in the future. I even know better!” declares Davin when I ask him about the zap.

With a smooth rumble the trusty engine thrums to life, if only because of the raw gas Davin’s pouring down the carb throat like a sad automotive version of foie gras. The Chevy rejects just enough with a backfire that it spits a flame right over the roof. Let’s just say the straight-six was celebrating its new life with some fireworks.

Once the engine fires off and avoids burning down, it’s off to the races to get the 216 pulled from the truck. A few bolts required the heat of a torch, something to be expected with any truck that has been used as a workhorse at some point in its life.

A quick cleanup in the parking lot shows an engine with some real potential. Will it be as nice inside as out? We’ll find out on the next Redline Update, because Davin will be breaking out the wrenches to prep this engine for the machine shop.

Be sure to subscribe to Hagerty’s YouTube channel to receive updates with each video that goes live.

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You know Davin Reckow and the rest of the Hagerty video crew are in for a whole heap of work on the next Redline Rebuild project when the first tool they use is a shovel.

The crew was preparing to pluck this truck from a treasure trove of cars not far from Hagerty headquarters in Traverse City, Michigan.

The truck was first discovered by Barn Find Hunter Tom Cotter while he looked through a treasure trove of cars not far from Hagerty headquarters in Traverse City, Michigan. Davin tagged along during that episode and noticed a 1950 Chevy five-window truck that looked to be worth saving.

Davin’s rescue mission didn’t have a great start, however. In the way was a fifth-generation Thunderbird showing previous rust repair on the quarter panels, and it was nearly ripped in two when it was unceremoniously hauled out by the rear axle. Although the T-bird was parked for less time than the truck, its lower stance and apparent predisposition for corrosion did it in. Davin remained hopeful about the truck, even as the Thunderbird was loaded onto a flatbed and hauled off.

With the route to extraction and resurrection prepped, Davin dug out the truck’s rocker panels so that it too could be dragged onto the flatbed. Ever upbeat, Davin commented, “I prefer to look at is as clearing paths for new opportunities.”

Once the truck was on the flatbed, Davin was able to take a better look, and the project appears promising. The truck is currently residing in Hagerty’s garage, where its six-cylinder awaits the next step. “The truck is here,” Davin said. “I can’t promise anything after that, but we’re gonna give it our best shot!”

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The Redline Rebuild team has been busy. In the past few months, at least three engines have spewed their parts onto just about every flat surface in the shop. The Ford Model A is the last of the trio to get put back together, and thankfully, no parts went missing in the flurry of engine rebuilds that have filled special projects editor Davin Reckow’s days and weeks. Davin sat down with lead videographer Ben Woodworth to discuss the details behind the build.

Davin and the Model A engine have a bit of history, as he was team lead for Hagerty’s 2016 Swap to Street build, where this car was brought to life with parts located at the Hershey Fall Swap Meet. In less than 100 hours, the team took the car from a rolling chassis to driving from Pennsylvania to Hagerty headquarters in Traverse City, Michigan. A massive oil leak from the rear of the engine kept it from completing the journey.

“The car just going to waste in the corner,” Davin says. “It was really fun to drive, but the amount of oil it was putting on the ground was just unacceptable. I thought it would make a fun around-town errand car for the shop, but that meant the engine was going to have to come out and get refreshed.”

The 200-cubic-inch inline-four got more than a refresh. The tear-down showed no significant damage, but refreshing this pre-war mill is more complicated than ordering parts from a catalog—a road trip was required.

“We could have mailed the engine block and connecting rods down to the machine shop and got back ready-to-use parts,” Davin says, “but I was honestly curious as to how the babbitting process worked.”

The process of pouring the new main and connecting rod bearings is really the highlight of this rebuild. For that process, the engine was taken to Ron’s Machine Shop in Shandon, Ohio. Once there, all the machine work was completed, in addition to the babbitt bearings.

Never one to leave well enough alone, Davin snuck in a few performance parts during assembly. A high-compression head bumped the squeeze of the engine to around 6-to-1, a “B” camshaft increased the duration of the valve opening, and a balanced crankshaft keeps it all spinning smoothly. In addition, the interior of the engine bloc was coated with Glyptal, which helps the oil drain back to the oil pan, which is essential since the oil level is critical—the connecting rods are lubricated by dippers that sling into the oil as the crankshaft rotates.

Be sure to watch the full video (which was recorded live) for additional quick tips and behind-the-scenes details; there’s even a question-and-answer session at the end. If you have a question that remains unanswered, be sure to subscribe to the Hagerty YouTube channel to receive notifications when each video that goes live, since we’ll be offering future opportunities to ask Davin your engine tear-down and assembly questions.

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The Redline Rebuild treatment is not just reserved for post-war, big-cube engines. Since Davin likes to keep things interesting, the project he picked to follow an awesome stream of V-8s isn’t even a new addition to the Hagerty garage. The 1931 Ford Model A from the Swap-to-Street challenge back in 2016 was languishing in a corner, largely forgotten. No matter what our plans were for the four-door as it collected dust, we knew we’d have to deal with the 200-cubic-inch four-cylinder’s penchant for puking its oil out on the pavement.

Before yanking the engine out, we thought we might as well cut loose a little. A few quick donuts on the way from storage to the garage were a salient, snowy reminder that this Murray-bodied Ford could be seriously entertaining. A small crew assembled the sedan in just four days from parts purchased at the Hershey fall swap meet.

The trip home revealed that the engine enjoyed pumping all its lubricant to the ground as efficiently as possible. The tired engine needed love… The kind of love a Redline Rebuild would give.

“I wouldn’t say we ever forgot about it, but the car certainly sat neglected for a while,” said Davin. “When brainstorming future projects, I remembered the Model A and thought it would be great to have it driving again.”

The engine came out—and for as simple as the engine looked, it went under the same process as the more powerful engines that have graced Davin’s engine stand. Parts came off, and once Davin was down to a bare block, the parts were loaded up for a road trip to Ron’s Machine Shop in Ohio. There new bearings were poured for the block and connecting rods, and the crankshaft got balanced and counterweighted.

“The goal was to create a smooth-running and reliable engine. We also put on a high-compression head and upgraded camshaft, but the goal wasn’t performance on this build, but drivability.”

Once assembled, it was time for the first start-up and break in. For this the engine test stand stayed in the corner. Rather than a static break-in, Ron’s Machine Shop gave specific instructions that seem quite strange at face value.

Davin explains how the advice isn’t as strange as it seems: “The bearing clearance is near-perfect fit when first assembled, which created enough friction that the starter won’t even crank the fresh engine. Ron’s told us to pull start the car and then immediately drive it to wear in the critical tolerances.”

With a handful of slow-speed miles under its belt, the Model A is no longer a cobwebbed piece of art in the garage. This sedan gets to live a second (or third, maybe even a fourth?) life starting with that tug from the tow strap. Where it’s headed next is unclear; stay tuned to Hagerty’s YouTube page to get the latest updates on all the cool projects our wrenches are working on.

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The Model A Ford that was reborn during a four-day build at the Hershey swap meet has lived an odd life, but it’s hopefully headed back on the road soon. First, it needs some new bearings, and that is no simple task—even for Redline Rebuild guru Davin Reckow. To get it done, a road trip was in order on the latest episode of Redline Update.

Davin filled a truck with everything he needs to survive—greasy engine parts, camera, and beef jerky, and hit the highway headed for Ron’s Machine Shop in Shandon, Ohio. The Model A engine got torn down and was now in need of fresh main and rod bearings, a process more involved than modern engines.

“These Model A engines utilize poured babbitt bearings, something that requires a bit of experience and tooling that neither I nor our local machine shop have,” said Davin when asked why he strayed away from the usual places with this engine.

Babbitt bearings are the polar opposite of insert bearings. The bearing material is cast in place on the engine block and connecting rods, then machined to final finished diameter. It is not incredibly complicated, but there are a few specialty tools required outside of the molds themselves, which simply don’t make sense to own unless you are pouring Model A bearings on a regular basis. Not your average enthusiast’s idea of an easy weekend task.

“The engine is really designed for maintenance. The bearings are cast with shims in them that if the tolerance grows too large, you simply pull the main caps, remove a shim, and put it back together,” Said Davin. “Rather than requiring a full tear down, you can refresh the bottom end of the short block by simply pulling the oil pan.”

The nice part of the design is that though it is easy to service, the low stress and overbuilt nature of the 40-horsepower engine mean that you likely won’t need to do service very often.

The next steps will be the assembly of this engine, and if you want to stay up to date on the latest updates for this engine and also the other projects Davin has going in the Redline Rebuild garage, be sure to subscribe to the Hagerty YouTube page to receive notifications with each video that goes live.

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The 401 Buick Nailhead has already bequeathed some good juju to the newest Redline Rebuild project: a 1950s Chevy 3600’s 216 Stovebolt.

Tom Cotter discovered the Chevy pickup in this Barn Find Hunters episode barely 10 minutes from the Hagerty Garage in Traverse City, Michigan. Davin plucked the Chevy 3600, which was sunk almost to the hubcaps in mud, from an equally immobile gaggle of VWs, Oldsmobiles, and T-birds. (The sad T-bird that blocked the Chevy’s path to freedom had a frame so rotted that it broke in half as we pulled it out of the way).

Freed from the Michigan mud and rodents of indeterminate origin, Davin set the 3600’s cracked rubber tires on blocks in the Hagerty garage. His first move is to analyze the straight-six’s electrical system, replacing spark plugs and connecting a new 6V battery to the newly cleaned battery cables. The starter spins—but doesn’t talk the engine into firing.

1950s Chevy 3600 Interior
1950s Chevy 3600

1950s Chevy 3600

Despite that, Davin is optimistic. “For this engine to turn over is phenomenal. We found a receipt that someone replaced a belt in 1970, but we presume the truck hasn’t run since then.”

A new coil disentangled from the Buick Nailhead fails to make the magic happen—until the next day, when Davin comes in with an a-ha moment and a $2.40 part: a condenser.

The Stovebolt turns over and chugs into life, and Davin breaks into a huge grin. He caps the Dawn bottle he used to trickle fuel directly into the carburetor. “Wow, that’s cool. Not only does the starter work, it turns over, and it’ll run.”

The 3600 was Chevy’s three-quarter-ton offering in the ’50s, and, in keeping with its farm-truck destiny, made “more torque than anything else.”

The goal, as Davin quotes “my good friend Matt,” is to get the Chevy to “stop and pull over” status. The ’50s truck won’t be putting on highway miles anytime soon, but some seriously cool rebuilding action is about to happen. Stay updated on YouTube and follow all the details of this Redline Rebuild on the Hagerty channel to see what comes next!

1950s Chevy 3600
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