Time for a cooling system refresh - OEM radiator still the way to go?

[eacmen]

Koyorad is a two pass versus others that are triple pass. The issue with the CSF is likely lack of sufficient airflow to support a triple pass.

I’ve also nearly reached the end of my patience with the CSF rad. It came with the car so was trying to make it work. I wish FCP, BW and others would stop selling them.


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[oceansize]

This warning comes with ESS superchargers:

"-If you run any other performance radiator than PWR, remove it and replace it with OEM. There is a lot of cooling problems with so called performance radiators when the system is stressed, do not ignore this warning."

With that said I haven't seen anyone report issues with Koyo and there seems to be quite a few using it.

[enjoy_m3]

Running Koyo over here without issue with no front aux fan and spal puller with n15 mounts. Great fitment and quality

[Tbonem3]

I would wait until the OE bmw or oe modine (same part) are back in stock.

[D-O]

Koyo radiator, all aluminum- Koyo is a major OEM for the Japanese auto industry.

Koyoradracing.com or authorized vendor- part number:
HH422675

Thanks. Was it necessary to make any modifications to get the Koyo to fit?

D-O

[D-O]

Right now I can't get and OEM radiator for love or money. Even my guy at the dealer says mid November.

[t44tq]

Koyo radiator, all aluminum- Koyo is a major OEM for the Japanese auto industry.

Koyoradracing.com or authorized vendor- part number:
HH422675

[siamkazi]

Can confirm, OE is the way to go. I learned the hard way, went down the CSF route, bunch of unstable temps and needle going too far right for my liking. Also fitment was hit or miss. Bought an OE off a member here (new), plugged it in, temp has been perfect, even through a few track sessions.

[Estoril]

OE.

[D-O]

Found a small puddle of coolant under the car this weekend. Opened the hood and found this:



Guessing this is a sign the water pump is leaking onto a pulley or belt.

With 95k and 19 years on the clock I am going to go ahead and refresh the entire system. Are any of the all metal radiators worth considering over OEM?

Any downside to replacing the belt driven fan with a SPAL 2082?

Any tips welcome.

D-O