Help seal the coolant outlet at the thermostat housing with the FEL-PRO 35710 Multi-Purpose O-Ring, cataloged as an engine coolant outlet O-ring and engine coolant thermostat housing seal. It fits many vehicles, among them the 1999-2013 Chevrolet Silverado 1500, 1991-1999 Chevrolet C1500 and 1991-1999 Chevrolet K1500, as a direct-fit replacement for the listed applications. See the "Vehicles it fits" section for the full list and engine details.
Fel-Pro designs its seals specifically for the real-world repair environment. This O-ring is designed to deliver a reliable seal, even on imperfect sealing surfaces and troublesome applications, and is made with Fel-Pro's proprietary materials.
- Original equipment standards: Fel-Pro rates it to original equipment specifications or better.
- Application-specific design: engineered for a precise fit on the listed vehicles.
- Built for real-world repairs: engineered and produced specifically for the repair environment.
- Exacting standards: like every Fel-Pro gasket, no matter how small, it is made using Fel-Pro's proprietary design, engineering and manufacturing processes.
Signs this O-ring may need replacing include coolant seeping or crusted coolant residue around the thermostat housing or coolant outlet, and a coolant level that keeps dropping. If a failed O-ring is the source of the leak, this replaces it. Diagnose the cause before replacing parts, and consult the vehicle service information for the correct installation procedure.
Interchange: 112431 · 113411 · 10209045 · 10238201 · 12551472 · 12551507 · 12557859 · C31273 · 411040100
This part cross-references / interchanges with the following part numbers:
112431, 113411, 10209045, 10238201, 12551472, 12551507, 12557859, C31273, 411040100
Frequently Asked Questions
What does the FEL-PRO 35710 O-ring do?
It is a multi-purpose O-ring cataloged as an engine coolant outlet O-ring and thermostat housing seal. It helps seal the joint at the coolant outlet and is designed to help keep coolant in the cooling system.
Does the FEL-PRO 35710 fit a 1999-2013 Chevrolet Silverado 1500?
Yes. The 1999-2013 Chevrolet Silverado 1500 is a listed application, along with the 1991-1999 Chevrolet C1500 and K1500. Check the "Vehicles it fits" section for engine details.
What are signs this O-ring may need replacing?
Coolant seeping or crusted coolant residue around the thermostat housing or coolant outlet, or a coolant level that keeps dropping. Diagnose the leak source first, since other cooling parts can cause similar signs.
Is it designed for surfaces that aren't perfect?
Yes. Fel-Pro designs its seals for the real-world repair environment, including imperfect sealing surfaces, and makes them with proprietary materials.
Which part numbers does the FEL-PRO 35710 cross-reference?
It cross-references 112431, 113411, 10209045, 10238201, 12551472, 12551507, 12557859, C31273 and 411040100.
