The Enginetech HB122 is a replacement Torque-to-Yield (TTY) cylinder head bolt set for 1986-2000 Ford/Mazda/Merkur 2.9L/4.0L engines.
Important Notes
- One set covers one cylinder head. Per-engine quantity: one set.
Specifications
| Part Number | HB122 |
| Product Type | Torque-to-Yield (TTY) Head Bolt Set |
| Bolt Type | Single-use TTY - do not reuse |
| Cross-References | Elgin:EHC110K, Clevite:821048, FEL-PRO:260-2509, FEL-PRO:2602509, FEL-PRO:ES72794 |
Vehicle Fitment
- 1986-1990 Ford Bronco II 2.9L 177ci V6 OHV [VIN:T]
- 1986-1992 Ford Ranger 2.9L 177ci V6 OHV [VIN:T]
- 1988-1989 Merkur Scorpio 2.9L 177ci V6 OHV [VIN:V]
- 1990-1997 Ford Aerostar 4.0L 245ci V6 OHV [VIN:X]
- 1990-2000 Ford Ranger 4.0L 245ci V6 OHV [VIN:X]
- 1991-1994 Mazda Navajo 4.0L 245ci V6 OHV [VIN:X]
- 1991-2000 Ford Explorer 4.0L 245ci V6 OHV [VIN:X]
- 1994-2000 Mazda B4000 4.0L 245ci V6 OHV [VIN:X]
Enginetech TTY (Torque-to-Yield) head bolt sets are engineered to
OEM specifications for proper cylinder head clamping force during engine rebuilds. TTY
bolts are designed for single use - they stretch plastically during torquing to achieve
precise clamp load and must never be reused. Enginetech packages head bolts in per-head
quantities for popular applications, making it straightforward to order exactly what your
engine requires. Always follow the manufacturer's torque sequence and torque angle
specification when installing TTY head bolts. Verify part fitment by year, make, model,
and engine displacement before ordering.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
