PRODUCT DETAILS
Koyo Aluminum Half Size Radiator - 1992-2000 Honda Civic / 1993-1997 Del Sol (D15/D16)
Your EG or EK Civic's got a D15 or D16 and the stock radiator's 25-30 years old. The plastic end tanks are brittle. You've probably already seen some cracking around the crimped seams or maybe you're getting slow coolant loss you can't track down. On a hot day sitting in traffic, the temp gauge creeps higher than it used to. You know it's coming. The stock radiator's going to let go eventually and when it does, you're stuck on the side of the road with coolant pouring out. Koyo's all-aluminum radiator (part number HH080292) gets rid of the plastic end tanks entirely. Everything's aluminum. TIG-welded end tanks, 48mm thick core, high-density fins. It's a direct bolt-in for stock D15 and D16 SOHC manual transmission cars. You're not building a 500 hp turbo motor. You're replacing a 30-year-old radiator that's about to fail with something that cools better and won't crack in another five years. If that's what you need, this is it.
Here's Why Plastic End Tanks Always Fail
Every stock EG and EK radiator has the same weak point. Aluminum core, plastic end tanks. The plastic's fine when it's new. Twenty-five years later? It's garbage. The plastic gets heat-cycled thousands of times. It gets brittle. The crimped seams where the plastic meets the aluminum start weeping coolant. Then they start cracking. We've had customers bring in Civics where the plastic tank's so degraded you can see hairline cracks running through it but it hasn't fully let go yet. It will. It's just a matter of time. Koyo's radiator is all aluminum. The end tanks are TIG-welded. There's no plastic to get brittle. There's no crimped seam to leak. The core's 48mm thick which is thicker than stock. The fin density's higher so you've got more surface area moving heat. Koyo uses Nocolok brazing which is a vacuum brazing process that creates stronger joints than the old-school soldering you see on cheap radiators. You're getting better cooling and you're getting a radiator that's actually going to last instead of failing in five years when the next set of plastic end tanks cracks.
Bolts Right In - No Cutting, No Modifications
This radiator's a direct swap for the stock unit. Same bolt holes. Same fan shroud mounting points. You pull the old radiator out and you bolt this one in. That's it. No cutting brackets. No drilling new holes. No custom mounts. It fits 1992-2000 Civic (EG and EK) and 1993-1997 Del Sol with D15 or D16 SOHC engines and manual transmissions. Both the inlet and the outlet are 28mm. That's the stock hose size for these engines. You're using your stock upper and lower hoses. You're using your stock clamps. The radiator's got the factory fan shroud mounts so you're bolting your stock fan and shroud right back on. You're not replacing fans. You're not fabricating shrouds. Everything bolts up like it's supposed to. The one thing you can't use is your stock radiator cap. Koyo radiators need a Koyo cap. The filler neck's slightly different and the stock Honda cap won't seal right. Buy the Koyo cap when you buy the radiator. It's like ten bucks. Don't find out the hard way.
What Doesn't Fit
This radiator does NOT fit 1999-2000 Civic Si or 1994-1997 Del Sol VTEC. The Si's got a B16A2. The Del Sol VTEC's got a D16Z6. Both of those engines use different radiators with different hose sizes. This radiator's specifically for non-VTEC D series SOHC engines. D15B, D15B7, D16Y7, D16Y8. The engines with 28mm radiator hoses. If you've got an automatic transmission, this also won't fit. Automatic transmission cars have a transmission cooler built into the radiator. This radiator's for manual transmission cars only. If you're not sure what engine you've got or whether your hoses are 28mm, measure the hoses or check your build sheet before you order.
It Cools Better But It's Not Magic
Koyo says this radiator cools up to 35% better than stock. We don't have a way to verify that exact number but here's what we do know. A 48mm thick core with high-density fins moves more heat than a 25-30 year old stock radiator with a thinner core and clogged fins. The all-aluminum construction doesn't degrade like plastic does. The TIG-welded tanks and Nocolok brazed core are way stronger than the crimped-and-soldered construction you get on cheap eBay radiators. Koyo's not some random company. They're Japan's largest aftermarket radiator manufacturer. They supply OEM radiators to car companies. They've been doing this for decades. This isn't a no-name radiator with sketchy welds and fins that collapse when you sneeze on them. It's a legit replacement that's going to cool better than your 30-year-old stock radiator and it's going to last.
What You Get
- Koyo all-aluminum radiator - part number HH080292
- 48mm thick core (thicker than stock)
- High-density fin design (more cooling surface area)
- TIG-welded aluminum end tanks (no plastic to crack)
- Nocolok vacuum brazing (stronger joints than soldering)
- Direct bolt-in (stock mounting points, stock fan shroud mounts)
- 28mm inlet and outlet (stock hose size - reuse your hoses and clamps)
- Works with stock fan and shroud
- Manual transmission only (no transmission cooler)
- Made by Koyo
Fits These Cars
- 1992-2000 Honda Civic CX/DX/EX/GX/HX/LX/VX (EG/EK) with D15 or D16 SOHC and manual transmission
- 1993-1997 Honda Del Sol with D15 or D16 SOHC and manual transmission
- Compatible engines: D15B, D15B7, D16Y7, D16Y8 (non-VTEC D series SOHC with 28mm hoses)
Note: Does NOT fit 1999-2000 Civic Si (B16A2) or 1994-1997 Del Sol VTEC (B16A3) - those use different radiators. Manual transmission only - automatic cars have transmission cooler in radiator, this radiator doesn't. 28mm inlet and outlet (stock hose size for D15/D16 SOHC non-VTEC). Requires Koyo radiator cap - stock Honda cap won't seal correctly on Koyo filler neck (buy Koyo cap separately, don't skip this or you'll have pressure loss and overflow issues). Direct bolt-in using stock mounting points and stock fan shroud mounts. Reuse stock upper and lower hoses, stock clamps, stock cooling fan and shroud. All-aluminum construction eliminates plastic end tank failures (stock radiators have plastic tanks that get brittle and crack after 25-30 years). 48mm core with high-density fins cools better than worn-out stock radiator. TIG-welded end tanks and Nocolok brazed core (way stronger than crimped-and-soldered cheap radiators).
1993-1997 Honda Del Sol S/Si