RVJ Machine Adjustable Timing Idler Kit

The RVJ Machine Adjustable Timing Idler Kit (13073-ADJ) is intended to properly align the camshafts on Subaru EJ20/EJ25 cylinder heads and/or blocks that are resurfaced or utilize thicker head gaskets. The ability to adjust and properly align the cams is recommended for any performance built Subaru.

What's included

• Two mounting bolts
• Two idlers with a machined 10mm hex, so your socket can hold the idler in place while you adjust the timing to perfection
• Installation instructions

Usage

The adjustable idler kit is designed for long blocks that are reduced in overall length by resurfacing the heads during a rebuild, decking the block, or both. That process effectively retards the timing: the belt has not changed length, so something needs to make up the difference in slack that the tensioner cannot provide. The same applies if you utilize thicker head gaskets.