If you're planning to squeeze the bit more lifestyle and responsiveness out of your Prelude or Agreement, an h22a balance shaft removal is probably on your short list of weekend projects. It's one of those modifications that generates a ton of discussion in the Ford community, mostly mainly because it sits right at the intersection of "race vehicle performance" and "daily driver comfort. " I've spent enough time under the hood of H-series engines to know that while Ford engineers were amazing, additionally they had to make compromises for the average motorist who didn't need their steering steering wheel vibrating at a stoplight.
But if you're reading this, you're likely not that average drivers. You want the engine to rev faster, you would like to eliminate the known failure stage, and you possibly wouldn't mind the slight bump within oil pressure. Let's dig into exactly what this actually involves and whether you should bother pulling those heavy shafts out of your block.
What those shafts are usually doing in the particular first place
The H22A is really a relatively large 4cyl engine. In the world of physics, big fours have a bit of a natural tendency in order to vibrate because of supplementary imbalances. To fix this particular and make the vehicle feel more "premium, " Honda additional two counter-rotating balance shafts. These shafts spin at twice the speed associated with the crankshaft plus are designed in order to cancel out those annoying vibrations.
They do an excellent job of creating the particular car feel soft, but they come in a cost. They're heavy, they consider up space in the crankcase, and they're driven with a belt. From the pure performance standpoint, they're basically parasitic weights that your engine needs to spin and rewrite every time you mash the gas pedal.
The particular performance gains you could expect
When people discuss h22a balance shaft removal, the particular first thing they often mention is how much faster the engine revs. Since you're removing several pounds of rotating bulk, the engine doesn't have to work as difficult to climb the RPM variety. It's a similar sensation to installing the lightweight flywheel. You might not notice a massive leap in peak hp on a dyno—maybe a few ponies at most—but the particular method the car delivers that will power feels very much more urgent.
It's all regarding reducing parasitic loss. Think about it: those shafts are sitting in the oil, rotating at high speeds. That creates drag. By ditching all of them, you're letting the particular engine use the energy to turn the wheels rather than spinning internal weights that will are only generally there for comfort.
The hidden benefit: Oil pressure and reliability
For me, the biggest cause to go through having an h22a balance shaft removal isn't your throttle response—it's the reliability. The H22 is notorious for having a "timing belt behind the timing belt. " The balance shafts are driven simply by their own small belt. If that will little belt button snaps or loses a tooth, it offers a nasty habit of having tangled in the main timing belt. If that happens, your own valves meet your pistons, and your engine is essentially an extremely expensive paperweight.
Beyond that, the particular balance shafts have their own bearings that require oil. When a person remove the shafts and work with a proper delete kit to connect the oil openings, you're effectively manipulating that oil back to the parts of the motor that actually require it, like the pole and main bearings. It's a common trick to see a noticeable jump in oil pressure after doing this, which is definitely a huge satisfaction for anyone which likes to spend time in the VTEC crossover range.
Let's talk about the vibration
I'm not heading to lie for you: the car will vibrate even more. If you're operating stiff aftermarket motor mounts (like those 75A or 85A poly mounts), you're going to feel the particular h22a balance shaft removal a lot more. In idle, you'll notice the steering steering wheel or maybe the rearview hand mirror might have a slight buzz to them.
However, once you get shifting, many people find this barely noticeable. It's mostly an "at-rest" phenomenon. If your vehicle is a dedicated track toy or even a weekend canyon carver, you probably won't care at all. If it's your daily driver that you take on two-hour commutes, you might find it a little annoying after a while. It's the trade-off, like nearly everything in the car world.
The way the removal process works
Carrying out an h22a balance shaft removal isn't something you would like to "wing" with some hardware store mounting bolts. You really require a dedicated remove kit. Many of these kits, like the well-known ones from KS Tuned, come with a block-off plate for the essential oil pump and plugs for the internal oil passages.
Tearing it down
You'll have got to get the engine timed in order to TDC, then pull the crank pulley, the timing covers, and both the particular timing and balance shaft belts. The real fun begins when you fall the oil skillet. Since the H22 uses a two-piece oil pan/stiffener assembly, it's a bit of a chore, but it offers you the great chance in order to view the health associated with your bottom finish.
Plugging the particular holes
Once the shafts are out, you can't just leave the particular holes open. If you do, you'll lose all your oil pressure plus kill the engine in minutes. You have to tap the essential oil feed holes or even use the press-in plugs provided within the kit. Most guys prefer the press-in style because it's cleaner and doesn't involve getting steel shavings within your engine block.
Typically the oil pump customization
One of the shafts really runs through the essential oil pump. The delete kit will usually consist of a bypass or even a block-off plate additional. It's an essential step. While you're in there, it's also a smart shift to replace your front main seal and maybe also the oil water pump itself if it's got high usage.
While you're in there
If you're likely to go through the particular effort of the h22a balance shaft removal, please don't be the person which puts an aged timing belt back on. You're already 90% from the way to a full timing service. Purchase a high-quality timing belt, a brand new tensioner (many people change to the guide H23 tensioner anyway because the H22 hydraulic one is usually prone to failing), and a fresh water pump.
It seems like a lot of money in once, but doing the work all together guarantees you won't have to touch the particular front of that engine for another 60, 000 in order to 100, 000 kilometers. It's the "peace of mind" tax, and it's often worth paying.
Is it the "must-do" modification?
If you're building a high-RPM H22, after that yes, I'd state an h22a balance shaft removal is totally mandatory. At high engine speeds, these shafts are re-writing at astronomical rates, and the risk of failure increases. For a share daily driver, it's more of a personal preference.
I've found that the H-series just feels more "alive" without all of them. It loses that slightly lazy, heavy feeling and begins to feel more like its smaller B-series cousins. You obtain that snappy, high-strung Honda character that we all dropped in love along with in the 1st place.
Final thoughts
Getting rid of the balance shafts on an H22A is one of those mods that sets apart the casual proprietors from the fanatics. It's a little bit of a work, and it certainly changes the personality from the car. You're trading a little bit of luxury-car designs for a more responsive, reliable, and "raw" engine.
Just make sure you do it right. Obtain a proper package, take your time with all the oil passing plugs, and definitely don't skip the particular manual tensioner conversion if you haven't done it yet. Once it's most buttoned up so you hit that 1st VTEC crossover with no fear of a balance belt taking, you'll know you made the correct call. The extra vibration is just the particular engine's way associated with helping you discover it's ready to play.