Melling M-55099

Oil pump pressure relief spring Melling M-55099 for Chevrolet small block engines (for Melling M-55HV and M-155HV pumps). Optional pressure relief spring for Melling Chevrolet small block oil pumps (e.g. M-55HV, M-155HV) – changes the relief valve opening pressure. The list below shows the engines these pumps fit.

• Typepressure relief spring
• Sold as1 piece

Typical applications – check dimensions

• Chevrolet – 200 (3.3 L) V6: 1978–79 · 229 (3.8 L) V6: 1980–84 · 262 (4.3 L) V8: 1975–76 · 262 (4.3 L) V6: 1985–96 · 265 (4.3 L) V8: 1994 · 267 (4.4 L) V8: 1979–82 · 283 (4.6 L) V8: 1957–67 · 302 (4.9 L) V8: 1967–69 · 305 (5.0 L) V8: 1976–2002 · 307 (5.0 L) V8: 1968–73 · 327 (5.4 L) V8: 1962–69 · 350 (5.7 L) V8: 1967–97 · 400 (6.6 L) V8: 1971–80
• GMC – 200 (3.3 L) V6: 1978–79 · 229 (3.8 L) V6: 1980–84 · 262 (4.3 L) V6: 1985–95 · 267 (4.4 L) V8: 1979–82 · 283 (4.6 L) V8: 1960–67 · 305 (5.0 L) V8: 1976–2002 · 307 (5.0 L) V8: 1968–73 · 327 (5.4 L) V8: 1967–68 · 350 (5.7 L) V8: 1969–95 · 400 (6.6 L) V8: 1971–72, 1974–80
• Pontiac – 229 (3.8 L) V6: 1980–81 · 262 (4.3 L) V6: 1985–87 · 267 (4.4 L) V8: 1979–82 · 305 (5.0 L) V8: 1976–92 · 307 (5.0 L) V8: 1968–73 · 350 (5.7 L) V8: 1977–79, 1987–97 · 350 (5.7 L) V8 (Chevrolet): 1977–79
• Buick – 267 (4.4 L) V8: 1981–82 · 305 (5.0 L) V8: 1977–87, 1991 · 350 (5.7 L) V8: 1977–79, 1992–96 · 350 (5.7 L) V8 (Chevrolet): 1977–79
• Oldsmobile – 262 (4.3 L) V6: 1991–94 · 267 (4.4 L) V8: 1981–82 · 305 (5.0 L) V8: 1977–80, 1982–87, 1991–92 · 350 (5.7 L) V8: 1977–79, 1992 · 350 (5.7 L) V8 (Chevrolet): 1977–79
• Cadillac – 305 (5.0 L) V8: 1991–92 · 350 (5.7 L) V8: 1990–96

Manufacturer part number: Melling M-55099.