Description

The OEM Mazda MX-5 crankshaft pulley bolt is an essential part for owners of a Mazda MX-5 with a “long/big nose” crankshaft. Although it is not standard practice to replace this bolt when changing the timing belt, if it is an old bolt (that has been tightened several times after many timing belt replacements) it is definitely recommended to renew it.

When using the existing bolt to install a press fit crankshaft pulley, such as our ATI muffler, it is wise to use a new bolt to hold everything in place. Remember to use blue Loctite and tighten the bolt to a torque of 160nm.

This crankshaft pulley bolt is suitable for Mazda MX-5 models from 1991 to 2005. It is important to note that the 1.6 engines may be equipped with a “small nose” crankshaft (1990-1991, with four slots on the face of the crankshaft pulley) or a “big nose” (1991+, with 1991-1993 models having eight slots and 1994-2005 models having no slots). This bolt is only for “big nose” engines and does not fit “small nose” engines.