BMW Cooling System Parts & Accessories for BMW 7 Series E23 (1978-1987)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Schwaben Coolant Refill/Air Purge Tool
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T#:362940
Part#: 003466SCH01
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$ 87.99 USD
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When it comes to BMW's we all know the weak point is commonly in the cooling system, many models proving hard to bleed the air pockets out after the refresh. The coolant refill tool solves this problem, ensuring that you get an air pocket free fill. The entire task is as simple as draining the system like normal, reinstalling the drain plugs and hooking the tool up to your refill location. The reason this tool works so well is due to the venturi valve, it converts air pressure from the compressor to vacuum inside the cooling system, then with a twist of a valve sucks coolant right into the system using the vacuum pressure.
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Coolant Vacuum Purge & Refill Tool Set
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T#:402498
Part#: 024948SCH01A
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Sale - Save 25% $ 115.99

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$ 86.99 USD
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$ 115.99

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$ 86.99 USD
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The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.
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OEM Bosch Coolant Temperature Sensor - E36 318i 325i M3 1992-1995, E3...
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Bosch - Corporate Logo
T#:7259
Part#: 13621709967
In Stock
$ 24.23 USD
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$ 24.23 USD
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To make sure your temperature readings are as accurate as possible, replace your temperature sensor with a high quality OEM Bosch temperature sensor.

OEM replacement for BMW part # 13621709967, 13621709966, and 13621284397. Bosch coolant temperature sensor mounted in the cylinder head on models with the M42, M50 and S50 engines.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


This item fits the following BMWs:
1988-1991 E30 BMW 318i 318is 318ic M3
1992-1995 E36 BMW 318i 318is 318ti 318ic 325i 325is 325ic M3
3/1987-1988 E28 BMW 528e
1985-1988 E28 BMW535i 535is M5
1989-1995 E34 BMW 525i 535i M5
1985-1989 E24 BMW 635csi M6
1984-1987 E23 BMW 735i
1988-1992 E32 BMW 735i 735il

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Schwaben Water Pump Pulley Holder for Removal of Fan Clutch
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T#:362357
Part#: 001170SCH01A
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Sale - Save 25% $ 43.99

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$ 32.99 USD
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Replacing the fan clutch on most BMW models requires holding the water pump pulley while removing the fan clutch lock nut. With less than 1 1/2" clearance on some models this project can easily turn into a mechanical nightmare. Using our special slim line fan clutch wrench in conjunction with the appropriate pulley spanner, the removal and installation required only a few moments.
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Schwaben Locking Hose Clamp Pliers
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T#:377131
Part#: 004170SCH01A
In Stock
Sale - Save 55% $ 63.99

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$ 28.79 USD
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These pliers feature a spring loaded clamp with a 24" cable and will lock onto the clamp and hold open for easy removal. These pliers are designed to remove metal or plastic self-tightening hose clamps with diameters from 11/16" to 2-1/2" ( 18 to 54mm).
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Radiator Pressure Tester Kit
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Schwaben - Corporate Logo
T#:391482
Part#: 014710SCH01A
Ships on Jul 30, 2026
Sale - Save 25% $ 205.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 154.49 USD
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Are you refreshing your coolant system or having issues with coolant loss? An easy way to test your system for leaks and ensure you're able to maintain pressure without coolant loss is the Schwaben Cooling System Pressure Tester Kit.
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Schwaben Long-Reach 32mm Open End Fan Clutch Wrench
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T#:378938
Part#: 007701SCH01A
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Sale - Save 25% $ 42.99

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$ 32.24 USD
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This tool was specifically designed for the tight clearances needed to remove most BMW fan clutches. Its slim design lets it fit into tight areas, and the extra-long length is ideal for fan shroud clearance. 
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Schwaben Locking Hose Pinch-Off Pliers
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T#:379950
Part#: 009787SCH01A
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Sale - Save 15% $ 39.99

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$ 33.99 USD
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Schwaben Locking Hose Pinch-Off Pliers have adequate clamping force to effectively seal large or pressurized cooling system hoses. These pliers are ideal for clamping shut most hoses, ensuring reliability in your automotive tasks. With swivel jaws, they provide even clamping force, making them a versatile tool for various applications.

  • Adequate clamping force for large or pressurized hoses
  • Ideal for clamping shut most hoses
  • Swivel jaws ensure even clamping force
  • Versatile tool for automotive maintenance

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. For more information, visit http://www.p65warnings.ca.gov.

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Schwaben & Bav Auto Water Pump And Fan Clutch Tool Kit
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T#:375872
Part#: 001170SCH01AKT
In Stock
Sale - Save 25% $ 65.99

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$ 49.49 USD
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Replacing the fan clutch on most BMW models requires holding the water pump pulley while removing the fan clutch lock nut. With less than 1 1/2" clearance on some models this project can easily turn into a mechanical nightmare. Using our special slim line fan clutch wrench in conjunction with the appropriate pulley spanner, the removal and installation required only a few moments.
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Schwaben 32mm / 36mm Fan Clutch and Oil Filter Cap Open-End Wrench ...
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T#:361021
Part#: DO-3236
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Sale - Save 25% $ 25.99

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$ 19.49 USD
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Why buy two tools when you can get one that will do many jobs like this open end wrench? It is great for removing and installing the fan clutch and plastic oil filter cap. Also works great for removing and installing the VAN0S solenoid on M50 engine family. Use the same tools the Turner Motorsport tech's use!

Features:

  • Made of Chrome Vanadium Steel for strength
  • 32/36mm open end sides

 

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Schwaben Radiator/ Intercooler Fin Comb
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T#:384260
Part#: 015326SCH01A
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Sale - Save 29% $ 20.99

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$ 14.99 USD
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Straighten bent fins in heat exchangers like radiators, condensers, and intercoolers obstruct air flow and reduce heat transfer. Paper-thin fins are easily bent, even by slight pressure.