





Install a new o-ring for a proper seal. 36×3.15
$1.00
The coolant outlet O-ring ensures a proper seal between the coolant outlet and mating components, preventing coolant leaks and maintaining correct operating temperatures.
Over time, exposure to heat, pressure, and coolant chemicals can cause O-rings to harden, flatten, or crack—leading to leaks that compromise cooling system performance. Each time the outlet or coolant piping is removed, this O-ring should be replaced to guarantee a leak-free installation.
This replacement is manufactured to OEM specifications, ensuring precision fit and long-lasting sealing reliability.
JC PRONTEZZA supplies OEM-quality O-rings and sealing components to keep your cooling system properly sealed and your engine protected.
OE Part Number: 037 121 687
| Weight | .02 lbs |
|---|---|
| Dimensions | 2 × 2 × .2 in |
| Mfg Part # | 037121687 |


O-Ring between thermostat housing and cylinder head


Replacement for damaged or seized units.
10X Entries For Our G87 M2 Sweepstakes!


Keep your oil clean and your engine running like new


Fix that oil leak for good!


O-Ring between thermostat housing and cylinder head
2X Entries For Our G87 M2 Sweepstakes!We Price Match – Give Us A Call or Chat!