New Jeep Wrangler Cherokee 4.0L OHV Cylinder Head – Fits Casting Numbers # 0331, 0630, 7120 | No Core Required
$ 97.56
New Jeep 4.0L Inline 6 Cylinder Head – Reinforced Universal Casting (1991-2007) Upgrade your Jeep’s legendary 4.0L engine with a reinforced, crack-resistant cylinder head designed to outperform the 0331, 7120, and 0630 factory castings. The Jeep 4.0L inline-six is famous for its longevity, but factory heads are notorious for cracking between the #3 and #4 cylinders. Our premium aftermarket replacement features a thickened deck and reinforced water jackets to eliminate these common failure points. This universal casting is a direct “bolt-on” upgrade for all 4.0L Jeep engines from 1991 to 2007, whether your original head used a distributor or coil-pack ignition. ��️ In-House Machining Process Debris-Free Preparation: Every new casting is chemically cleaned and blown out to remove all residual machining oils and manufacturing debris. This ensures your oiling system remains uncontaminated from the first start-up. In-House Precision Machining: We perform all final machine work in-house, including precision valve seat cutting and guide sizing, to ensure perfect geometry and clearances. Pressure & Integrity Testing: To go beyond the factory standard, we pressure-test every head to 60 PSI. This verifies that the casting is free of porosity leaks or internal defects. Dimensional Inspection: Our technicians perform a multi-point inspection of the gasket-sealing surface. This ensures the head is perfectly flat and meets tight OEM tolerances for a flawless fit. Vacuum-Seal Verification: Every intake and exhaust port is Vacuum Tested. This guarantees a 100% airtight seal between the valves and seats, ensuring maximum compression and peak performance right out of the box. �� Technical Specifications Engine: Jeep 4.0L Inline 6 (OHV) Year Range: 1991-2007 Replaces Casting Nos: 0331, 7120, 0630 Material: Heavy-Duty Cast Iron (Reinforced) Each Cylinder Head Includes: Valves and Springs Installed �� Fitment Data Common Applications: Jeep Wrangler (YJ/TJ/LJ): 1991-2006 Jeep Cherokee (XJ): 1991-2001 Jeep Grand Cherokee (ZJ/WJ): 1993-2004 Jeep Comanche (MJ): 1991-1992 [ ] Click to View Full Detailed Fitment List CHEROKEE 91-95 6-242 (4.0L) COMANCHE 91-92 6-242 (4.0L) GRAND CHEROKEE 93-95 6-242 (4.0L) WRANGLER 91-95 6-242 (4.0L) CHEROKEE 96-99 6-242 (4.0L) GRAND CHEROKEE 96-98 6-242 (4.0L) WRANGLER 97-99 6-242 (4.0L) CHEROKEE 00 6-242 (4.0L) CHEROKEE 01 (4.0L) GRAND CHEROKEE 99-04 4.0L (6 cylinder) WRANGLER 00-02 6-242 (4.0L) WRANGLER 03-06 4.0L �� Core Return & Warranty ❌ NO CORE REQUIRED — No core fee, no return needed. Your old part is yours to keep or dispose of as you see fit. Warranty: 2-Year Unlimited Mileage Warranty included. Click here for Warranty details.