JDM Engine FAQ - Arthur Gonzalez JDM Engines

Question 1

What makes JDM engines different from USDM engines?

Accepted Answer

JDM (Japanese Domestic Market) engines are built to different specifications than their USDM counterparts. They often feature higher compression ratios, different tuning, and sometimes exclusive technologies like VTEC variants not available in the US market. Japanese engines also typically have lower mileage due to strict inspection requirements and cultural driving habits.

Question 2

How do I know the actual mileage of a JDM engine?

Accepted Answer

Japanese engines come with detailed documentation including the original odometer reading and inspection records. We verify mileage through multiple sources including auction sheets, inspection certificates, and physical engine condition. Most JDM engines have significantly lower mileage than domestic alternatives due to Japan's strict Shaken inspection system.

Question 3

What warranty do you provide on JDM engines?

Accepted Answer

We offer a comprehensive 30-day warranty on all JDM engines covering internal engine components. This includes the block, heads, pistons, rods, and crankshaft. External components like alternators, starters, and accessories have a 7-day warranty. Extended warranty options are available for purchase.

Question 4

Can I install a JDM engine myself?

Accepted Answer

While possible for experienced mechanics, JDM engine swaps require significant technical knowledge, specialized tools, and often custom fabrication. We recommend professional installation to ensure proper fitment, wiring integration, and compliance with local regulations. We can provide referrals to qualified installers in your area.

Question 5

What additional parts will I need for my engine swap?

Accepted Answer

Common additional parts include: engine mounts (often custom), wiring harness adaptation, ECU programming or replacement, exhaust modifications, cooling system components, and sometimes transmission modifications. We provide detailed parts lists and can source most required components.

Question 6

How are engines packaged and shipped?

Accepted Answer

Engines are professionally drained, sealed, and mounted on custom pallets. We use specialized freight carriers experienced with automotive components. Shipping typically takes 5-10 business days depending on location. All shipments include tracking and insurance coverage.

Question 7

Do you ship internationally?

Accepted Answer

Currently, we ship within the continental United States. International shipping requires special documentation and compliance with import regulations that vary by country. Contact us for specific international shipping inquiries as we may be able to arrange special cases.

Question 8

Are JDM engines emissions compliant in the US?

Accepted Answer

JDM engines may not meet US emissions standards and could require modifications for legal street use. Compliance varies by state and local regulations. We recommend checking with your local DMV and emissions testing facility. Many customers use JDM engines for track, race, or off-road applications where emissions compliance isn't required.

Question 9

What's the difference between VTEC and non-VTEC Honda engines?

Accepted Answer

VTEC (Variable Valve Timing and Lift Electronic Control) engines use multiple cam profiles to optimize performance across different RPM ranges. At higher RPMs, VTEC engages a more aggressive cam profile for increased power. Non-VTEC engines use a single cam profile optimized for a balance of efficiency and performance.

Question 10

Can I use my existing ECU with a JDM engine?

Accepted Answer

This depends on the specific engine and vehicle combination. Some JDM engines require their original ECU due to different sensor configurations or engine management requirements. Others can work with USDM ECUs with proper tuning. We provide guidance on ECU compatibility and can source JDM ECUs when needed.

Question 11

What maintenance should I perform after installing a JDM engine?

Accepted Answer

Immediately after installation: change all fluids (oil, coolant, transmission), replace filters, check timing belt condition, and perform a thorough inspection. Follow a break-in procedure for the first 1,000 miles with gentle driving and frequent oil changes. Regular maintenance should follow manufacturer specifications.

Question 12

Where can I find parts for my JDM engine?

Accepted Answer

Many JDM engine parts are interchangeable with USDM versions. For JDM-specific parts, we maintain relationships with Japanese suppliers and can source most components. Common maintenance items like filters, belts, and gaskets are readily available through standard automotive parts suppliers.

Question 13

Why do JDM engine prices vary so much?

Accepted Answer

Pricing depends on several factors: engine rarity, mileage, condition, included accessories, and market demand. Low-mileage examples of popular engines (like 2JZ-GTE or RB26DETT) command premium prices. More common engines or higher-mileage units are more affordable. Seasonal demand and availability also affect pricing.

Question 14

Do you offer financing options?

Accepted Answer

We accept various payment methods including credit cards, bank transfers, and certified checks. For large purchases, we can discuss payment plans on a case-by-case basis. We also work with third-party financing companies that specialize in automotive purchases.

Question 15

What is your return policy?

Accepted Answer

Returns are accepted within 30 days of delivery for engines that don't match the described condition. The engine must be uninstalled and in the same condition as received. Customer is responsible for return shipping costs unless the engine was misrepresented. Restocking fees may apply.

Frequently Asked Questions