BBTV 4205 Engine Piston Ring
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BBTV

BBTV 4205 Engine Piston Ring

Brand BBTV 4205
1st Oil Groove 4
1st Oil Ring Material Steel rail/stainless exp
1st Oil Ring Surface Treatment Chrome
2nd Groove 2.5
2nd Ring Surface Treatment Phosphate
Cylinder Quantity 6
2nd Ring Material Grey iron
Top Ring Material Grey iron
Engborein 3.661
Engboremetric 93.00
Oversize Std
Top Groove 2
Top Ring Surface Treatment Phosphate
Fits Ford and Mercury · 27 vehicles

Standard oversize. Sized for a 3.661 in. / 93.00 mm bore in rebuild applications.

Phosphate and chrome finishes. Surface treatments help support controlled wear during engine assembly.

Six-cylinder configuration. Built for engine rebuild work on select Ford and Mercury platforms.

Cross-references Sealed Power 433NP, 9562X and E351X for the same application. See all 3.

$26.75Free shipping
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Engine piston ring set for Ford and Mercury applications

This engine piston ring set, part number 4205, is built for specific Ford and Mercury engines with a 93.00 mm bore and standard oversize. It uses grey iron and steel rail materials with phosphate and chrome surface treatments for controlled wear characteristics.

Key features

  • Part number 4205 for targeted engine rebuild applications
  • Standard oversize with a 3.661 in. / 93.00 mm bore
  • Grey iron top and second rings for consistent sealing performance
  • Steel rail and stainless expander oil ring design
  • Phosphate and chrome surface treatments for ring break-in and wear control
  • Configured for six-cylinder engines

Detailed description

Part number 4205 is an engine piston ring set intended for rebuild work on select Ford and Mercury engines, including applications such as the Ford Ranger, Ford Bronco II, Ford Aerostar, Ford Mustang, Ford Pinto, Mustang II, Mercury Bobcat, and Mercury Capri. The ring package combines a grey iron top ring, a grey iron second ring, and a steel rail/stainless expander oil ring arrangement to support cylinder sealing and oil control in standard-bore engines. The phosphate-treated top and second rings and chrome-treated oil ring surfaces add a finish commonly used in engine assembly for controlled seating and wear behavior.

What this part helps address

  • Excessive oil consumption from worn piston rings
  • Low compression caused by ring wear or loss of sealing
  • Oil control issues during engine rebuilds
  • Ring replacement needs for standard-bore six-cylinder engines
  • Restoration work on older Ford and Mercury engine platforms

Installation notes and tips

Verify bore size, groove dimensions, and oversize before installation. Match the ring set to the engine specification and inspect cylinder walls, pistons, and ring lands during assembly. Proper ring end gap measurement and clean installation practices are important for sealing performance and break-in.

Quality assurance

This part cross-references Sealed Power 433NP for the same application. Interchange references also include 9562X and E351X.

This part fits 27 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
1986FordAerostar2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1985FordBronco II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1985FordRanger2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1984FordBronco II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1984FordRanger2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1983FordRanger2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1979FordMustang2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1979FordPinto2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1979MercuryBobcat2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1979MercuryCapri2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1978FordMustang II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1978FordPinto2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1978MercuryBobcat2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1977FordMustang II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1977FordPinto2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1977MercuryBobcat2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1977MercuryCapri2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1976FordMustang II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1976FordPinto2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1976MercuryBobcat2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1976MercuryCapri2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1975FordMustang II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1975FordPinto2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1975MercuryBobcat2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1975MercuryCapri2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1974FordMustang II2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
1974MercuryCapri2.8LV6Top Ring Surface Treatment: Phosphate; Weights: 0.775lb
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Sealed Power — 433NP9562XE351X