Timing Chain Guide Retainer Tool 240Z 260Z 280Z 280ZXTool for holding the timing chain in place while the cylinder head is being installed on "L" series 4 and 6 cylinder engines. Plastic tool so it will not damage your engine. Wedge this tool in between the vertical timing chains to hold them in place while installing the cylinder head and then the tool can be removed once the head is on and chain is attached to the gear on the cam. This tool has a hole in the top for attaching a piece of rope, zip tie