An inline engine has one deck, one water jacket and one pour. A V engine has two of each, and they sit at an angle to one another. That one difference changes how block filler goes in: how the kit is packed, how you measure, how the block has to sit on the stand, and how you plan the day. If you're reinforcing a V6, V8 or V10, this is what to expect before the first can is opened.
Two decks that never face the same way
On an inline-4 or inline-6, the deck is a single flat face. Set the block on a level surface, check it with a level, and the whole water jacket is ready to fill. On a V engine, each cylinder bank has its own deck, its own section of water jacket and its own head gasket. Because the banks are angled away from each other, the two decks can't both be level at the same moment.
That matters because a liquid filler finds its own level. The EPOXY54 Installation Guide asks you to confirm the block is level by placing a level on the deck surface before you pour, then to bring the epoxy up in layers to 1–2 mm below the deck. If the deck you're pouring into is tilted, the epoxy will be deeper at one end of the bank than the other. So the bank you're pouring has to be the one sitting level.
Why one bank cures before the other is touched
Our post on why EPOXY54 kits are priced differently puts it plainly: a V engine's two banks can't be filled at the same time. One side is poured and cured, then the block is rotated and the other side is filled. Rotate too early and the first pour, still liquid, moves with the block.
The working time is the other reason. Once the hardener and epoxy are mixed and the batch has turned completely blue, you have about 25 minutes before it starts to harden. The installation guide also tells you to mix all the hardener with all the epoxy and not to split a batch into smaller quantities. One batch for two banks, poured hours apart, simply doesn't work.
How V kits are packed, and how much is in them
Because of the bank-by-bank pour, EPOXY54 kits for V engines ship in two separate containers. Each one is a complete batch for one side, mixed whole when that bank is ready. For a Dry Block (full fill, no coolant through the block, track use only), the product page lists these standard sizes:
| Engine configuration | Dry Block kit | How it's split |
|---|---|---|
| V6 | 2 × 600 ml | One per bank |
| V8 | 2 × 1080 ml | One per bank |
| V10 | 2 × 1200 ml | One per bank |
| Inline 6 (for comparison) | 1080 ml | Single kit |
| Inline 4 (for comparison) | 600 ml | Single kit |
Read across the table and one bank of a V6 gets the same Dry Block volume as an inline-4, and one bank of a V8 the same as an inline-6. Those are starting points, not guarantees. The product page is clear that full-fill volume varies with bore size, coolant jacket depth and block design, and it recommends measuring first.
Measuring a V block, one side at a time
The method in our guide to measuring for a Dry Block / Full Fill works the same on a V engine: tape off the water ports, fill the jackets with water to the deck surface, and measure what you used. The water volume equals the epoxy volume you need.
Since a V kit arrives as one container per bank, it pays to measure each bank separately and write both numbers down. If one side holds more than its container, you want to know on the bench, not halfway through a pour with 25 minutes on the clock. If either number lands outside the standard sizes, contact EPOXY54 before ordering; the team can supply larger custom kits.
Partial Fill on a V engine
Most street-driven V engines will use Partial Fill, which keeps OEM coolant capability. The epoxy fills only the top ¾" of each bank's water jacket, on top of a temporary layer of sugar or salt, and coolant keeps flowing underneath once the solute is flushed out. How Does the Engine Cool After EPOXY54? explains the layout.
The V-specific details are about doing everything twice, independently:
- Solute depth per bank. The guide has you fill with sugar to about ¾" below the deck and confirm the depth with calipers. Check it on the bank that's level, not across both at once.
- Tape per bank. Coolant ports and the deck outline are taped for the side you're pouring. The other side can be prepped once the block is rotated.
- Coolant passages per gasket. Each bank has its own head gasket, and the passages are drilled using that bank's gasket as the template. Have both gaskets on hand before you drill either side.
Choosing between the two cooling options in the first place? Partial Fill vs. Dry Block covers it, and our block filler myths post answers the "won't it overheat?" question directly.
Aluminum and iron V8s
EPOXY54 is formulated to closely match the thermal expansion of aluminum and has 21,000 psi compressive strength once cured. Among V engines, the product page lists GM's aluminum LS blocks (LS1, LS2, LS3 and similar) as open-deck applications, and VQ among the platforms it has been tested on. If you're building a VQ, the Nissan VQ35 collection carries EPOXY54 alongside the rest of the bottom end.
Iron V8s are common too. Many customers use EPOXY54 successfully in cast iron applications, including small block Chevys and iron LS-family blocks such as LQ truck blocks and LSX race blocks. For large iron dry-block fills there's a dedicated Cast Iron Block Epoxy Kit (5L), with 2.5 L per bank, so the one-bank-at-a-time approach carries over. Background is in Cast Iron Engine Block Filler, and LS owners will find platform detail in LS Block Filler.
What about flat-4 and flat-6 engines?
Boxer engines also have cylinders on two sides, but they're their own case. They have dedicated Flat 4 and Flat 6 options on the product page, and their Dry Block sizes (1080 ml and 1200 ml) are listed as single kits rather than one per bank. If you're filling a flat engine, choose the Flat option and ask EPOXY54 how to sequence the pour for your block before you start.
Planning the day around two pours
Treat a V engine as two separate jobs that share a block. Clean, preheat, tape, level and pour the first bank. Let it cure fully before the block moves. Then rotate, level the second deck, and repeat with the second container. Build the cure time into your schedule rather than trying to save a day; a rushed rotation is the one mistake that can't be fixed with a drill bit afterward.
A few things make that go smoothly:
- An engine stand or bench setup that lets you rotate the block and lock each deck level.
- Both head gaskets in hand, since they decide where each bank's coolant passages go.
- The EPOXY54 Install Kit in its "V" configuration option if you don't already own a stir stick, drill bit and squeeze bottle. Masking tape and sugar or salt aren't included.
Not sure your block is open deck in the first place? Open Deck vs Closed Deck Block shows how to check, and our glossary of engine block terms decodes words like solute and working time.
Choose your V kit
On the EPOXY54 product page, pick V6, V8 or V10 as your engine configuration, then Partial Fill or Dry Block. Your kit arrives as two containers, one for each bank, with complete instructions and an installation video. Questions about bank volume or an unusual block? Email support@epoxy54.com before you order. Made in USA.