The Nissan Skyline R32, R33, and R34 Engine Block Rear Main Oil Seal Retainer Locating Dowel for RB26, RB25, RB20, and CA18 engines is a precision-engineered Nissan component designed to ensure perfect alignment and sealing integrity between the engine block and the rear main oil seal retainer housing. Installed in the machined port at the lower rear of the cylinder block near the oil pan joint, this small steel dowel (approximately 5mm in diameter and 12mm long) provides critical positioning accuracy during assembly.
By securing the rear main oil seal retainer in its exact location, the dowel maintains correct housing alignment against the block’s machined surface, preventing distortion or misalignment that could lead to oil leaks or premature seal wear. This precise fit is essential to maintaining proper crankshaft lubrication and sealing performance under the extreme torque and pressure loads typical of RB-series engines.
Commonly replaced during rear seal servicing, clutch replacements, or complete engine rebuilds, this locating dowel helps preserve the reliability and durability of high-performance RB engines. Terra Firma Automotive supplies genuine Nissan components to ensure your Skyline’s engine remains leak-free, properly aligned, and performing at its best for years to come.
- 2 Required On RB26/25/20
- 4 Required On CA18
- 12mm Long
- 5mm Wide
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