If you're planning a project car or just trying to figure out if your Z is a bit of a pig, the vq35de weight is probably one of the first things you started looking up. It's the heart of the 350Z, the G35, and plenty of Maximas and Muranos, but when it comes to engine swaps, every pound matters. On average, a dry VQ35DE long block weighs in at about 313 to 330 pounds (roughly 142 to 150 kg). That's not too shabby for a 3.5-liter V6, especially when you consider some of the iron-block dinosaurs people used to swap into small cars.
But here's the thing: "dry weight" is a bit of a lie we all tell ourselves. Nobody drives around with a dry engine. Once you start bolting on the alternator, the power steering pump, the AC compressor, and filling it with oil and coolant, that number starts creeping up toward the 450-pound mark pretty quickly. Still, for an engine that can reliably push out 300 horsepower with just a few bolt-ons, it's a solid power-to-weight contender.
Breaking Down the Numbers
When we talk about the vq35de weight, we have to be specific about what's actually being measured. If you buy a "long block" from a junkyard, you're usually getting the block, heads, and maybe the valve covers. In that state, it's quite manageable. Two guys can move it around if they've been hitting the gym, though I'd definitely recommend a proper engine hoist if you value your lower back.
The reason the VQ35DE is relatively light compared to older Nissan engines like the RB25 or RB26 is its all-aluminum construction. Nissan moved away from the heavy cast iron blocks of the 90s to save on fuel economy and improve handling. By using an aluminum block with cast-iron cylinder liners, they got the best of both worlds: the heat dissipation and weight savings of aluminum with the durability of iron where the pistons actually do their work.
If you're comparing this to a modern four-cylinder, yeah, it's going to feel heavy. A Honda K24 is going to be about 80 to 100 pounds lighter. But if you compare it to a Ford or Chevy small-block V8 from the old days, the VQ looks like a featherweight. Even compared to the VR38DETT found in the R35 GT-R, the VQ35DE is much easier to package and toss into a lightweight chassis like an S13 or an 86.
Why the VQ35DE Weight Matters for Swaps
So, why do people obsess over the vq35de weight so much? It usually comes down to weight distribution. If you're dropping this engine into a car that originally came with a four-cylinder, you're adding weight over the front wheels. This can lead to understeer, which is the last thing you want if you're building a drift car or a grip-focused track toy.
The cool thing about the VQ is that it's quite compact. Because it's a 60-degree V6, it sits relatively low and far back in the engine bay if you mount it correctly. In a Nissan 240SX, for example, a VQ35DE swap actually keeps the weight distribution fairly similar to the original KA24DE setup, especially because you're losing the heavy turbo setup that many people add to four-cylinders.
Another thing to keep in mind is the transmission. The VQ usually gets paired with the CD009 six-speed manual. While the engine itself is reasonable, that transmission is a tank. It's incredibly strong, but it adds a significant amount of weight to the overall drivetrain package. When people calculate their total "swap weight," they often forget that the gearbox is just as important as the block itself.
Comparing the DE to Other VQ Variants
It's also worth looking at how the vq35de weight stacks up against its younger brothers, like the VQ35HR or the VQ37VHR. You'd think they'd be the same since they're all V6s, right? Not exactly.
The HR (High Response) and the 3.7-liter versions actually gained a little bit of weight. Nissan reinforced the block, added a structural oil pan, and went to a dual-intake system. All those extra bits add up. The VQ35DE is often seen as the "simplest" and lightest of the bunch, which is why it remains so popular for budget-conscious builders. It doesn't have the fancy dual-throttle bodies or the complex VVEL system found in the 370Z engine, which keeps the physical footprint and the weight slightly lower.
Shaving Weight Off Your VQ35DE
If you're worried that the vq35de weight is going to ruin your car's balance, there are plenty of ways to trim the fat. One of the easiest places to start is the intake plenum. The stock upper plenum is a chunky piece of cast aluminum. Switching to a plastic intake manifold (from some of the newer front-wheel-drive VQ models) or a lightweight aftermarket spacer setup can save a few pounds up high, which helps lower the center of gravity.
Exhaust manifolds are another big one. The factory cast-iron manifolds are heavy and restrictive. Swapping those out for stainless steel headers not only makes the engine sound like a screaming banshee but also drops about 10 to 15 pounds right off the sides of the block.
Then you've got the accessories. If you're building a dedicated track car, do you really need that AC compressor? Pulling the AC and the power steering (if you're going with a manual rack or electric setup) can strip another 30-40 pounds off the front of the engine. Every little bit counts when you're trying to make a car feel nimble.
The Reality of "Ready to Run" Weight
When you see a number like 313 lbs for the vq35de weight, just remember that's the "naked" version. In the real world, you have to account for: - Flywheel and Clutch: A stock dual-mass flywheel is incredibly heavy (nearly 30 lbs). Swapping to a lightweight chromoly flywheel can save 15 lbs instantly. - Fluids: Five or six quarts of oil and a couple of gallons of coolant add about 20-25 lbs. - Wiring and ECU: Not a ton of weight, but it all adds up in the total package. - Mounts and Brackets: Steel engine mounts are heavier than you think.
If you're doing a swap, expect the total weight increase over a standard inline-four to be around 100 to 150 lbs once everything is hooked up and running. For many, that's a small price to pay for the instant torque and the reliability that a 3.5-liter V6 provides.
Is It Worth It?
At the end of the day, the vq35de weight is one of its strongest selling points in the V6 world. It's lighter than the iron-block V6s of the past and more compact than many of its rivals. It offers a great middle ground for people who want more power than a four-cylinder but don't want the bulk and complexity of a V8 swap.
Whether you're trying to shave tenths off your lap time or just curious about what's under the hood of your Nissan, knowing the weight gives you a better perspective on how the car handles and reacts. It's a well-engineered piece of machinery that balances strength and weight better than most people give it credit for. Sure, it's got its quirks (like the infamous oil consumption on early models), but in terms of physical mass, it's a pretty efficient way to get 300 horses under your hood.
So, don't let the numbers scare you off. The VQ35DE is a versatile, relatively light, and incredibly capable engine. Just maybe use a hoist when you're moving it around—your back will thank you later.