ACDelco Crankcase Cleaner

ACDelco Crankcase Cleaner contains solvents, emulsifiers, detergents, and lubricants, specially blended to GM engineering specifications, to remove engine contaminants caused by everyday stop-and-go driving.


  • Helps remove engine oil contaminants from the oil system of the engine
  • Developed to exceed your performance expectations


  • When applying to crank and cam bearing, pour product over bearing and journals prior to installing crank and camshaft.
  • When applying to lifter assembly, dip base of valve lifters in ACDelco E.O.S. Assembly Lubricant, and pour product over camshaft lobes through lifter ports in engine block.
  • When applying to oil pump, fill oil pump cavity with product to facilitate priming.
  • When applying to piston and ring assembly, liberally coat with product before installing into engine.
  • When applying to engine bores, coat entire surface of engine bore prior to piston installation.
  • Keeping your vehicle well lubricated can help prevent major component failures and minimize the development of wear problems that require costly repairs. Vehicle components will deteriorate much faster if they are not properly lubricated to decrease friction and minimize damage, especially from metal-to-metal contact.
  • Proper lubrication provides many benefits: increased driving comfort by reducing noise, vibration, and harshness, increased performance by helping providing durable, long-term functioning of automotive components, increased safety by keeping hard-to-reach components working as designed, and increased reliability by helping components withstand extreme temperatures and harsh operating conditions.


Q: Do synthetic lubricants provide significant advantages over petroleum-based?
A: Yes. Synthetic lubricants are often better at very hot or very cold temperatures. Synthetic lubricants can also be more resistant to wash out from exposure to water.

Q: Do I need to clean off old lubricant and/or grease before applying this product?
A: No. It is not necessary to clean off old lubricant before applying this product because the new product will only add to the protection. Clean the area only if the old lubricant is contaminating other surfaces.

Q: Can I use a combination of two types of lubricants and/or greases on the same component where they may come in contact with each other?
A: Yes. Different lubricants can sometimes be combined, however, in order to obtain the most consistent results, it is best to use only one type of lubricant.

Q: Is it easy to remove this product from my vehicle components, if necessary?
A: Yes. Most lubricants can be removed with a cloth or rag. Do not use other solvents or cleaners because the new application of lubricant may be negatively impacted by the cleaner solvents.