Does a roller cam need to be broken in?

Does a roller cam need to be broken in?

Roller cams do not need to be broken-in, nor do they need any zinc in the oil, but ALL flat tappet cams need both. Do NOT break-in your cam or engine with non-detergent oil!

How do you break-in a roller engine?


  1. Install the Camshaft.
  2. Set the Valve Lash or Preload as recommended by the manufacturer.
  3. Prime the Oiling System.
  4. Set the Initial Ignition Timing.
  5. For carbureted engines, make sure fuel bowls are full and any air is bled from the fuel lines.
  6. Start the engine and immediately raise rpm to 3,000.

How do you break-in a new engine with a roller cam?

Here are a few break-in tips from the experts:

  1. Wash off the rust preventative coating that is on the parts prior to installation.
  2. Apply a calcium-sulfonate grease instead of ZDDP before assembly.
  3. Use a finer micron filter during break-in.
  4. Prime the pump before firing the engine.
  5. Do not idle the engine.

How long does it take to break in a roller camshaft?

This ensures a critical supply of oil to the cam and lifters at initial start-up. Do not idle the engine. Bring the engine up to 2,500 rpm and vary the speed by a few hundred rpm for 20-30 minutes. After a 30-minute break-in, change the oil filter.

What do they do during an engine break in?

What is actually being done during engine break-in is fairly simple – it’s the controlled bedding, or wearing-in, of the new piston rings on the hone of the cylinder walls. “We are trying to bed those rings so that they achieve a correct seal against the cylinder walls, and we have a relatively narrow window in which to do this,” relates Simon.

What happens when I break in my roller lifter?

Metal particles are created during engine break-in. These are the biggest issue to the bearings in the roller lifter. Most camshafts come with specific break-in procedures. The following procedure could apply to any roller camshaft. The specific instructions for your camshaft may vary slightly.

Why are break in oils bad for roller bearings?

Quite simply, not all break-in oils are the same. Some break-in oils are designed to accelerate the break-in process, and as a result, these oils generate higher levels of wear metal—bad news for your roller bearings. Other oils are friction modified. The added slipperiness of these oils can prevent the rings from seating properly