Z3-Cooling

Are you looking to push some serious air? There is no denying that BMW does not always have the best cooling systems. In fact one of the first thin...

BMW isn't known to have the most robust coolant systems, but most of this can be fixed with regular preventative maintenance.  If you want to take ...

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 80 degree thermostat, you are allowing the coolant to...

We probably get more questions about how to wire up an electric fan properly than anything else. Because of this, we put together a SPAL EZ fan rel...

Bleeding your M5x engine can be a nightmare at times. BMW set up their cooling system with an external reservoir and bleeder screw. The problem wi...

The plastic bleeder screws that come standard on BMW cooling systems do their job pretty well. However, they can strip pretty easily if you're not ...

BMWs definitely aren't known for their cooling systems, but you don't have to lose sleep over it. All of these cars by now have seen quite a few mi...

If you are looking for a way to tap into your coolant system to install an aftermarket temperature gauge, than look no further. We use a brand new...

A very popular upgrade for track cars. By replacing your original 92 degree thermostat with a 71 degree thermostat, you are allowing the coolant to...

The fan clutch delete modification on E36 6 cylinder engines (M50, M52, S50, S52), has become a very popular modification. By deleting the OEM fan ...

The OEM BMW water pump pulley on the M5x series of engines is plastic and can easily become brittle and break.  We have been selling our aluminum w...

The aluminum thermostat housing for the M5x/S5x engine familly is a very common upgrade. The stock thermostat housing is plastic and can crack ove...

Mixing the best of both worlds. Our regular tapped aluminum thermostat housing has become a fan favorite to easily add an aftermarket coolant gauge...

What do you get the guy that has everything? The final touch to his fan clutch delete. This machined cap is anodized black and covers the threads o...

If your BMW E36/Z3 is like most E36s at this point, this radiator switch plug has probably disintegrated into a million pieces.  You have probably ...

**These radiators are getting very hard to get, and come in and out of stock very fast. If you are interested, please email us to ask if they are i...

The stock water pump pulley is plastic from the factory and has been known to crack over time from heat cycles and stress. The water pump is an imp...

There is no denying that SPAL electric fans are a great upgrade over the stock electric fan or mechanical clutch fun. But purchasing the fan is onl...

One of a major causes of failure on the BMW E36 is the coolant system.  Since the cooling system runs pretty hot, it is a pressurized system, the u...

Are you looking to convert your OBD2 M52 or S52 to OBD1?  The OBD2 coolant pipe is press fit in with orings, while the OBD1 coolant pipe uses a tra...

Koyorad quality is a direct result of their privately owned factories which allow Koyorad Japan to oversee each stage of radiator production. The n...

If your thermostat housing is leaking, it is most likely this gasket.  This fits in the groove of your thermostat housing which sandwiches between ...

This switch is installed in the side of the radiator and controls when your auxiliary fan will come on for cooling.  This is a common failure point...

Thermostats are a common failure point on BMWs and can leave you stranded or worse overheat your engine.  Replace your thermostat in your BMW S54 e...

Your OEM mechanical fan is a crucial part to your BMWs coolant system.  When the fan fails, it will prevent the fan from spinning which can cause o...

BMWs aren't exactly known for their coolant systems, which is exactly why it is good preventative maintenance to replace your old worn out water pu...

This switch is installed in the side of the radiator and controls when your auxiliary fan will come on for cooling.  This is a common failure point...

This switch is installed in the side of the radiator and controls when your auxiliary fan will come on for cooling.  This is a common failure point...

This switch is installed in the side of the radiator and controls when your auxiliary fan will come on for cooling.  This is a common failure point...

It is time to change your cracked and leaking coolant expansion tank return hose with this high quality OE replacement. Replaces BMW PN 11531740649...

The coolant expansion tank on the M5x engines are a crucial part to your cooling system.  Unfortunately BMW made these out of plastic and over time...

Your OEM mechanical fan clutch is a crucial part to your BMWs coolant system.  When the fan clutch fails, it will prevent the fan from spinning whi...

Looking to easily add an oil cooler to your M5x (M50, S50, S52) engine? Look no further. This beautiful CNC'd aluminum oil cooler cap is by far the...