Accessory Brackets & Eliminators

Where should the alternator and vacuum pump go when the engine is rebuilt for track or street? This category contains brackets, mounting plates and eliminators that secure, relocate or remove belt-driven accessories. The parts are for you with an engine project where the original brackets no longer fit.

What accessory brackets and eliminators do

An accessory bracket holds, for example, the alternator or vacuum pump in place relative to the crankshaft pulley, so the belt runs straight and can be tensioned correctly. Eliminators are typically used when an accessory is removed, so the belt routing still works. From Moroso there are, for example, combined alternator and vacuum pump brackets for Chevrolet Big Block, while Peterson Fluid Systems is represented with mount blades – mounting plates for the left or right side of the engine – including for Ford Coyote 5.0L.

How to choose the right bracket

Fitment depends on more details than the engine type alone. Check in particular:

• Engine and side: the bracket is made for a specific engine and often for either the left or right side.
• Water pump: some brackets come in versions for, for example, CSR, Meziere and Moroso water pumps, as the pump typically affects the bracket's design.
• Alternator size: e.g. 93 mm or 130 mm, so the bracket fits your particular alternator.
• Belt tension: some mount blades have built-in tension adjustment.
• Belt routing: the belt and pulleys must suit the new position – see also belts and pulleys.

Installation and maintenance

The bracket must line up with the other pulleys; a misaligned belt can cause wear, noise or make the belt jump off. Check bolt torque and belt tension after the first drives and regularly thereafter, as vibrations can loosen parts over time. If the vacuum pump creates negative pressure in the crankcase, it is linked to the engine's oiling system, so check hoses and seals at the same time. You will find more parts for your project under engines and engine components.

Frequently asked questions

What should I know about my water pump before choosing an alternator bracket?

Some brackets are made for a specific water pump, e.g. CSR, Meziere or Moroso. So check which pump is fitted to the engine and choose the bracket with exactly that designation.

What do 93 mm and 130 mm in the bracket's name mean?

The number indicates the alternator size the bracket is made for. Check your alternator before ordering, as a bracket for a different size typically won't fit without modifications.

Why are there mount blades for both the left and right side?

The plate is designed for the bolt holes and belt routing on one specific side of the engine. Choose the side based on where the accessory will sit, and check whether you need the version with belt tension adjustment.

Can I reuse my old belt after fitting a new bracket?

It depends on the new position. If the bracket relocates the accessory, the belt's length and path typically change, so measure the belt routing before installation and choose a belt that fits.