Honda Civic Crx Si – The Ultimate Guide To Owning, Modding

Ah, the honda civic crx si. Just the name conjures images of nimble handling, a high-revving engine, and a driving experience that’s pure, unadulterated fun. If you’re reading this, chances are you either own one of these legendary machines, are dreaming of snagging one, or simply appreciate automotive icons that stand the test of time. You know the unique thrill of a lightweight chassis paired with Honda’s engineering prowess.

But owning a classic like the CRX Si isn’t just about the thrill; it’s also about understanding its quirks, keeping it running strong, and perhaps even unlocking a bit more of its potential. Whether you’re a seasoned wrench-turner or a weekend DIYer, you want practical, no-nonsense advice to ensure your CRX Si continues to turn heads and carve corners for years to come.

In this comprehensive guide, we’re diving deep into everything honda civic crx si. We promise to equip you with the knowledge and actionable tips you need, from routine maintenance and troubleshooting common problems to smart performance upgrades and even a realistic look at light off-road aspirations. Get ready to master the art of CRX Si ownership and keep your pocket rocket roaring!

Understanding Your Honda Civic CRX Si: A Deep Dive into its Legacy

The honda civic crx si isn’t just a car; it’s a statement. Introduced in the late 1980s, the CRX Si quickly became a benchmark for affordable performance and fuel efficiency. Its lightweight design and spirited engine created a driving experience that few cars, even today, can match. This section serves as your essential honda civic crx si guide, highlighting what makes these cars so special and why they continue to captivate enthusiasts.

Why the CRX Si Still Rocks

The appeal of the CRX Si lies in its simplicity and purity. It’s a direct connection between driver and road, devoid of modern electronic nannies. This translates into incredible feedback and an engaging drive that’s both challenging and rewarding. The car’s low curb weight (often under 2,000 lbs) means even its modest horsepower figures feel exhilarating.

Furthermore, the CRX Si boasts impressive fuel economy for a performance-oriented vehicle, making it a sustainable choice for daily driving or weekend cruises. Its compact size makes it a joy to maneuver in urban environments, while its agile chassis begs for winding roads.

Key Features and Specs

Most enthusiasts refer to the second-generation CRX Si (1988-1991), which truly cemented its legend. Key features include:

Engine: D16A6 1.6-liter SOHC 16-valve engine.
Horsepower: Typically around 108-110 hp.
Torque: Around 92-100 lb-ft.
Transmission: 5-speed manual, known for its crisp shifts.
Suspension: Double wishbone front and rear, an advanced setup for its time, providing superior handling.
Weight: Approximately 2,000-2,100 lbs.

These specifications, while modest by today’s standards, combine to create a car that punches well above its weight class in terms of driving enjoyment. The balanced chassis and responsive engine are the true benefits of honda civic crx si ownership.

Essential Maintenance for Your Honda Civic CRX Si: Keeping the Legend Alive

To ensure your honda civic crx si remains a reliable and thrilling ride, proactive maintenance is crucial. These cars are getting older, and while Hondas are known for their longevity, they still require consistent care. Think of this as your comprehensive honda civic crx si care guide, designed to keep your classic running strong and even make it a more sustainable choice.

Routine Checks and Fluid Management

Regular fluid checks and changes are the backbone of a healthy engine. Don’t skip these!

Engine Oil: Check oil level weekly and change every 3,000-5,000 miles (or every 6 months), using a good quality 5W-30 or 10W-30 synthetic blend. Always replace the oil filter.
Coolant: Inspect the coolant level in the reservoir and radiator before driving, especially on longer trips. Flush and replace every 2-3 years with a Honda-approved ethylene glycol-based coolant.
Brake Fluid: Check the reservoir level and look for discoloration. Bleed the brake lines and replace fluid every 2 years to prevent moisture buildup and maintain braking performance.
Transmission Fluid: For manual transmissions, check and change the fluid every 30,000-60,000 miles with Honda MTF (Manual Transmission Fluid) or an equivalent. This is vital for smooth shifts and transmission longevity.
Power Steering Fluid: If equipped, check the level and condition. Replace every 3-4 years.

Keeping up with these basics is not just good practice; it’s an eco-friendly approach, extending the life of components and reducing waste. This contributes to a more sustainable honda civic crx si.

Timely Belt and Spark Plug Replacement

These often-overlooked components are critical for engine health and performance.

Timing Belt: This is a non-interference engine, but a broken timing belt will leave you stranded. Replace the timing belt every 60,000-90,000 miles or every 5-7 years, regardless of mileage. It’s wise to replace the water pump and tensioner at the same time.
Accessory Belts: Inspect the serpentine belts (alternator, power steering, A/C) for cracks or fraying. Replace them as needed, typically every 40,000-60,000 miles.
Spark Plugs: Replace spark plugs every 30,000-45,000 miles. Use the correct heat range and gap for your D16A6 engine (NGK BKR6E-11 or similar). Fresh plugs ensure efficient combustion and optimal fuel economy.

Suspension and Brake System TLC

The CRX Si’s legendary handling relies on a well-maintained suspension and braking system.

Brakes: Inspect brake pads and rotors regularly. Replace pads when they’re down to 3mm-4mm thickness. Check rotors for warping or excessive wear. A firm brake pedal is a must for safety.
Suspension Components: Look for worn bushings, ball joints, and tie rod ends. These can drastically affect handling and tire wear. Listen for clunks or squeaks over bumps. Replacing these components can bring back that “new car” feel.
Tires: Maintain correct tire pressure (check your door jamb sticker) and rotate tires every 5,000-7,500 miles. Inspect for uneven wear, which can indicate alignment issues or worn suspension parts.

Regularly checking and replacing these items will not only preserve your CRX Si’s performance but also ensure it remains a safe and reliable vehicle. These are core honda civic crx si best practices for longevity.

Common Problems with Honda Civic CRX Si and How to Tackle Them

Even the most beloved classics have their quirks. Knowing the common problems with honda civic crx si can save you time, money, and frustration. Here’s what to look out for and some practical honda civic crx si tips for addressing them.

Rust: The Silent Killer

Due to their age and often exposure to harsh climates, rust is arguably the biggest enemy of the CRX Si. Common areas include:

Rear Quarter Panels: Especially around the wheel arches and where the bumper meets the body.
Rocker Panels: The sills along the bottom of the doors.
Sunroof Channels: If equipped, water can collect and cause rust.
Strut Towers: Both front and rear can suffer, especially if water gets trapped.

DIY Tip: Regularly wash your CRX, especially in winter. Inspect these areas frequently. Small surface rust spots can be sanded down, treated with rust converter, and repainted. For more extensive rust, professional bodywork might be necessary to prevent structural damage. Don’t ignore rust; it spreads quickly!

Electrical Gremlins and Fuel System Foibles

Aging wiring and components can lead to frustrating electrical issues.

Main Relay Failure: A very common issue, especially when the car is hot. Symptoms include intermittent no-starts or stalling. The solder joints crack over time.
Fix: You can often resolder the main relay yourself (located under the dash, near the steering column) or buy a new/refurbished unit. It’s an easy DIY job with basic soldering skills.
Ignition System: Distributor issues (internal coil, igniter) can cause misfires or no-starts.
Fix: Test components with a multimeter. Often, replacing the entire distributor or its internal modules is the simplest solution.
Fuel Pump: Older fuel pumps can weaken, leading to poor performance or failure.
Fix: Listen for the pump priming when you turn the key. If it’s weak or silent, a replacement is in order.

Drivetrain and Transmission Concerns

The D-series engine and manual transmission are robust, but some issues can arise.

Oil Leaks: Valve cover gaskets, oil pan gaskets, and distributor O-rings are common culprits.
Fix: These are usually straightforward gasket replacements. Use good quality OEM or aftermarket gaskets.
Clutch Wear: Like any manual car, the clutch will eventually wear out. Symptoms include slipping under acceleration or a high engagement point.
Fix: A clutch replacement is a significant job, often requiring specialized tools or professional help. When replacing, consider a new pressure plate, throw-out bearing, and pilot bearing.
Shift Linkage Bushings: Worn bushings can lead to a sloppy shifter feel.
Fix: Replacing these with aftermarket polyurethane bushings can dramatically improve shift feel and precision.

Addressing these issues promptly will keep your CRX Si running smoothly and reliably, making it a joy to drive.

Boosting Performance and Handling: How to Honda Civic CRX Si for Maximum Fun

Part of the allure of the honda civic crx si is its fantastic platform for modification. Whether you’re chasing more horsepower or razor-sharp handling, there are plenty of ways to enhance your ride. Here’s how to honda civic crx si for optimal performance, while adhering to honda civic crx si best practices for upgrades.

Engine Upgrades and Tuning

The D16A6 engine is a solid foundation, but careful modifications can yield noticeable gains.

Intake and Exhaust: A high-flow air intake and a performance exhaust system (cat-back) can free up a few horsepower and improve throttle response. Look for systems designed specifically for the CRX Si to ensure proper fitment and sound.
Header: Upgrading the exhaust manifold (header) to a 4-2-1 design can improve exhaust scavenging and mid-range torque.
Camshaft: A more aggressive camshaft grind can increase valve lift and duration, boosting power, especially at higher RPMs. This often requires professional installation and tuning.
Engine Swaps: For serious power, popular swaps include the B-series (B16A, B18C) or even K-series engines. This is a complex and costly undertaking, requiring significant fabrication, wiring, and a professional tuner.
ECU Tuning: For any significant engine modification, an aftermarket ECU (like Hondata or equivalent) and a professional tune are essential to optimize fuel delivery and ignition timing, ensuring safety and maximizing gains.

Remember, any engine modifications should be done thoughtfully. Always prioritize reliability and proper tuning to avoid damaging your engine.

Suspension and Chassis Enhancements

The CRX Si’s double wishbone suspension is already excellent, but it can be made even better.

Coilovers: A good set of adjustable coilovers allows you to fine-tune ride height, damping, and spring rates. This is arguably the biggest improvement you can make to handling. Look for reputable brands like Tein, KW, or Fortune Auto.
Sway Bars: Upgrading front and rear sway bars can significantly reduce body roll and improve cornering stability. Adjustable sway bars offer even more tuning options.
Bushings: Replacing old rubber bushings with polyurethane alternatives (e.g., Energy Suspension) throughout the suspension and subframe will sharpen handling response and reduce deflection.
Strut Tower Braces: Front and rear strut tower braces can stiffen the chassis, reducing flex and improving steering response.
Wheels and Tires: Lighter wheels reduce unsprung weight, improving acceleration, braking, and handling. Pair them with high-performance summer tires for maximum grip. Ensure proper offset and tire size to avoid rubbing.

Braking System Improvements

More power means you need more stopping power. Don’t overlook brake upgrades.

Performance Pads and Rotors: Simply upgrading to high-performance brake pads and slotted/drilled rotors can dramatically improve braking feel and fade resistance.
Brake Lines: Stainless steel braided brake lines reduce expansion under pressure, leading to a firmer, more consistent pedal feel.
Big Brake Kits: For track use or highly modified cars, a big brake kit (larger calipers and rotors) might be necessary. This often requires larger wheels to clear the calipers.

Always ensure your braking system is up to the task of your car’s performance. Safety first!

Off-Road Setup? A Realistic Look for the Honda Civic CRX Si

When you hear “FatBoysOffroad,” you might not immediately think of a honda civic crx si. And you’d be right – it’s certainly not designed for rock crawling or deep mud. However, with its lightweight chassis and robust Honda engineering, the CRX Si can be surprisingly capable and incredibly fun on light gravel roads, fire trails, or even autocross events with a rally-inspired twist. This isn’t about extreme off-roading, but rather exploring what’s possible for a spirited drive beyond the tarmac.

Light Trails and Rally-Inspired Mods

If you’re looking to explore some unpaved paths or participate in gravel autocross, here are some realistic modifications:

Increased Ride Height: The most critical modification. Rally-spec coilovers or a custom lifted suspension setup (often involving longer springs and modified strut mounts) can provide the necessary ground clearance. Aim for 1-2 inches of lift.
Skid Plates: Protect your oil pan, transmission, and fuel tank from rocks and debris. Custom fabrication or aftermarket plates designed for similar Civic platforms might be adaptable.
Tires: Ditch the street performance tires for all-terrain or even dedicated gravel rally tires. These offer better grip on loose surfaces and are more resistant to punctures. You’ll likely need a smaller wheel diameter (e.g., 14″ or 15″) to get proper sidewall height.
Mud Flaps: Essential for protecting your paint from flying debris and keeping mud off your windows.
Lighting: Auxiliary driving lights or rally lights mounted on the bumper or a light bar can significantly improve visibility on dark trails.
Interior Safety: Consider a roll bar or cage for added safety if you plan on pushing limits on loose surfaces, especially if you’re hitting rallycross events.

Safety Note: Always assess the terrain. The CRX Si is still a 2WD car with limited suspension travel. Avoid deep ruts, large rocks, and anything that could high-center or severely damage the undercarriage. Drive within your limits and the car’s capabilities.

Protecting Your Investment

Even with light off-road use, increased wear and tear are inevitable. Regular inspections are key:

Undercarriage Checks: After every off-road excursion, inspect your suspension components, brake lines, fuel lines, and exhaust for damage.
Alignment: Off-road driving can throw off your alignment. Get it checked regularly to prevent premature tire wear.
Cleanliness: Thoroughly wash the undercarriage to remove dirt, mud, and salt, which can accelerate rust.

A “rally-inspired” CRX Si is about having fun and pushing boundaries within reason, not transforming it into a full-blown off-roader. It’s a testament to the versatility of this incredible platform.

Buying and Owning a Honda Civic CRX Si: What You Need to Know

So, you’re ready to dive into the world of the honda civic crx si? Great choice! But buying a classic car requires a discerning eye and a solid understanding of what to look for. This section provides a practical honda civic crx si guide for prospective buyers and owners.

Pre-Purchase Inspection Checklist

When looking at a CRX Si, thorough inspection is paramount. Bring a flashlight, a magnet, and a knowledgeable friend if possible.

Rust: This is number one. Check all the common spots mentioned earlier: rear quarters, rocker panels, sunroof, strut towers, and floorboards. Use a magnet to detect bondo over rust.
Engine: Listen for unusual noises (knocks, ticks, excessive smoke). Check for oil leaks. Ensure the engine starts easily, idles smoothly, and revs freely without hesitation. Check the coolant reservoir for oil contamination and the oil cap for milky residue.
Transmission: Test all gears, including reverse. Look for smooth engagement without grinding or popping out of gear. Check the clutch for slippage.
Suspension & Steering: Drive over bumps and listen for clunks. Check for excessive play in the steering wheel. Look for uneven tire wear.
Brakes: Ensure the pedal is firm. Listen for squealing or grinding.
Electrical: Test all lights, wipers, power windows (if equipped), radio, and gauges.
Interior: Check for tears in seats, cracks in the dash, and water leaks around windows or the sunroof.
Documentation: Ask for maintenance records. A car with a history of care is a huge plus.

If anything seems suspicious or beyond your repair capabilities, don’t hesitate to walk away or factor in the cost of professional repair. A pre-purchase inspection by a trusted mechanic is always a wise investment.

Finding Parts and Community Support

Owning an older car means that parts availability can sometimes be a challenge, but the CRX Si benefits from a passionate community and shared platforms with the Civic.

OEM Parts: Honda still stocks some parts, especially for the drivetrain. Check online Honda parts diagrams.
Aftermarket: Many companies still produce performance and replacement parts for the CRX Si and EF-chassis Civics. Major retailers like Summit Racing, Jegs, and specialized Honda tuners are good sources.
Used Parts: Junkyards, online forums, and social media groups are excellent for finding used or rare parts. The CRX community is strong and supportive.
Online Forums & Groups: Join dedicated CRX forums (e.g., Honda-Tech, CRXCommunity) and Facebook groups. These are invaluable resources for troubleshooting, modification ideas, and connecting with other owners. You’ll find a wealth of honda civic crx si tips and advice there.

Embrace the community aspect of CRX ownership. It’s not just about the car; it’s about the people who love them.

Frequently Asked Questions About the Honda Civic CRX Si

What does “Si” stand for in Honda models?

The “Si” designation stands for Sport Injection. It indicates a higher-performance variant of a standard Honda model, typically featuring a more powerful engine, sportier suspension, and enhanced interior/exterior styling.

Is the Honda CRX Si a good daily driver today?

Yes, with proper maintenance, a honda civic crx si can absolutely be a good daily driver. Its excellent fuel economy, nimble handling, and Honda reliability make it practical. However, be prepared for an older car’s quirks, a lack of modern safety features, and potentially higher insurance costs for a classic/performance vehicle.

What are the best performance mods for a CRX Si?

For the D16A6 engine, popular and effective performance mods include a quality intake and exhaust system, a performance header, a more aggressive camshaft, and a proper ECU tune. For handling, adjustable coilovers, upgraded sway bars, and polyurethane bushings make a huge difference. For serious power, engine swaps are common but complex.

How do I check for rust on a CRX Si before buying?

Thoroughly inspect the rear quarter panels (especially around the wheel wells), rocker panels, sunroof channels, and strut towers. Use a flashlight to look into crevices and a small magnet to detect areas filled with body filler (bondo). Pay close attention to the floorboards and subframe mounting points. If possible, lift the car to inspect the underside.

Is the CRX Si engine (D16A6) reliable?

Yes, the D16A6 engine is known for its legendary Honda reliability and durability. With regular oil changes, timing belt replacements, and attention to cooling system maintenance, these engines can easily last well over 200,000 miles. They are relatively simple to work on, making them a favorite among DIY mechanics.

Owning a honda civic crx si is more than just having a car; it’s being part of a legacy. This guide has armed you with the essential knowledge to maintain, troubleshoot, and even enhance your iconic pocket rocket. From understanding its unique benefits and tackling common issues to exploring performance upgrades and even light off-road possibilities, you’re now better equipped to keep your CRX Si thriving.

Remember, consistency in maintenance, attention to detail, and a healthy dose of passion are all you need. Enjoy every drive, every twist, and every turn. These cars are built to be driven and cherished.

Stay safe, stay passionate, and keep that CRX Si legend alive!

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Thomas Corle

Founder & Automobile expert at FatBoysOffroad

Automobile expert and off-road enthusiast, sharing in-depth knowledge of vehicles, gear, and adventures. Helping readers make smart decisions and enjoy the thrill of off-roading safely and confidently.