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Precision Intake Valve Guides for Toyota 3S Cylinder Heads
Brian Crower BC3936 is an eight-piece intake valve-guide set for compatible Toyota 3S-GTE and 3S-GE cylinder heads using 6.0 mm valve stems. The BC3936 guides are CNC-machined from manganese-silicon-aluminum bronze to replace worn intake guides during a properly measured cylinder-head rebuild.
Key Features
- Intake-side application for Toyota 3S-GTE and 3S-GE engine families.
- 6.0 mm valve-stem application; verify actual valve and guide dimensions.
- CNC-machined manganese-silicon-aluminum-bronze alloy.
- Set of eight intake guides.
- Compatible with appropriate Brian Crower stainless-steel valves according to the manufacturer.
Fitment
| Application | Fitment requirement |
|---|---|
| Toyota 3S-GTE | Cylinder head with compatible 6.0 mm intake valves; verify head generation and finished guide dimensions |
| Toyota 3S-GE | Compatible cylinder head and 6.0 mm intake-valve configuration |
| MR2 Turbo / Celica All-Trac 3S-GTE builds | Confirm installed engine and cylinder head; vehicle model year alone does not establish direct fit |
The BC3936 is an engine-specific machine-shop component rather than a universal direct-fit accessory. Match the cylinder-head casting and valve stems before installation.
Specifications
| Detail | Value |
|---|---|
| Brand | Brian Crower (runBC) |
| Manufacturer part number | BC3936 |
| Part type | Intake valve guides |
| Engine family | Toyota 3S-GTE / 3S-GE |
| Valve side | Intake only |
| Valve-stem application | 6.0 mm |
| Material | Manganese-silicon-aluminum bronze |
| Manufacturing method | CNC machined |
| Quantity | 8 guides |
What's Included
- Eight Brian Crower 6.0 mm intake valve guides.
- Valves, valve seals, valve springs and installation labor are not included.
For BC3936, confirm final finished bore size with the engine builder.
About Brian Crower
Brian Crower (runBC) manufactures performance valvetrain components, including replacement guides, valves, springs and cylinder-head hardware for Toyota 3S-series engines.
Related Parts
- Brian Crower Toyota 3S-GTE valve spring set — verify cylinder-head and bucket configuration.
- Supertech 6 mm intake valve-stem seals, set of eight — verify guide OD and seal application with the machine shop.
FAQ
What is the BC3936?It is an eight-piece bronze intake valve-guide set for compatible Toyota 3S-GTE/3S-GE heads with 6.0 mm intake-valve stems.
Are these intake or exhaust guides?These are intake-side guides. Exhaust guides are ordered separately.
How many guides are in the set?Eight intake guides, sufficient for the intake positions in a compatible 16-valve cylinder head.
What material does Brian Crower use?The manufacturer specifies manganese-silicon-aluminum bronze.
Do these fit a Toyota MR2 Turbo?They are listed for 3S-GTE heads; confirm the installed engine generation, stem diameter and guide dimensions before ordering.
Will these fit the 3S-GE engine?Brian Crower lists 3S-GE applications, subject to actual cylinder-head and valve dimensional compatibility.
Can these be installed without machine-shop work?Valve-guide replacement requires correct interference fit, final bore sizing and verification of stem clearance and seat alignment.
Are valves or seals included?No. The listing is for the intake valve guides only.
Installation Instructions
- Confirm the exact Toyota cylinder-head casting and 6.0 mm valve-stem application.
- Have a qualified cylinder-head machine shop inspect guide wear and measure installation bores.
- Remove original guides using manufacturer-approved head support and temperature procedures.
- Install the BC3936 guides to the machine shop's verified interference-fit and projection specifications.
- Finish-size the guide bores and confirm valve-stem clearance, valve-seat alignment and final valvetrain assembly.
California Proposition 65 Warning
WARNING: This product can expose you to chemicals, including Chromium (hexavalent compounds), lead and lead compounds, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov
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