I have a quick question regarding the USDM 99-00 Civic Si (B16A engine).

What is the core thickness of the OEM radiator? Is it 1" or 5/8"? I know the D-Series came with 5/8" thick radiator cores.

I live overseas and don't have access to a USDM vehicle.

TIA.

 

this is 100% verified but from what i can tell just from pics it looks to be the same thickness as my 97 ex radiator. so i'm guessing 5/8''

 

In pictures end tanks look the same, but the cores might be different.

Anyone with an actual measurement?

 

Stock 99-00 Si radiators have a 1'' core instead of the 5/8th''. About a year ago my radiator sprung a leak and I replaced it with a single cam radiator which is 5/8th''. It cools the b16 perfectly and I've never had any problems whatsoever, even in the 95 degree Florida summers.

 

thanks for correcting me.

 

Thanks! I needed that first hand info.