What is Assembly Lube

Assembly lube is a type of lubricant used to aid in the assembly process of engines and other mechanical systems. It prevents metal-on-metal contact, reducing friction and wear during initial startup. Assembly lubes are designed to be applied before an engine is started for the first time, or after it has been disassembled for maintenance or repair.

The lubricant works by creating a film on all surfaces that need protection from friction such as bearings, pistons, cylinder walls and valve stems. This coating helps reduce heat buildup due to friction between parts during start up which can lead to catastrophic failure if not addressed properly with assembly lube.

Assembly lube is a specialized lubricant designed to be used in the assembly of engines, transmissions, and other automotive components. It helps to protect against corrosion during the initial startup period, while also reducing friction and wear between metal surfaces.

Assembly lube is applied directly onto newly machined parts before installation and can help reduce break-in time for new engine builds or component replacements.

What is Assembly Lube

Credit: www.amsoil.com

Do You Need to Use Assembly Lube?

Yes, you need to use assembly lube when putting together an engine. Assembly lube is a special lubricant designed to protect against friction during the initial start-up of your vehicle’s engine. For example, it can be used on moving parts before they are tightened down and also applied to threads so that nuts and bolts do not become cross threaded or over stressed during installation.

By reducing friction, assembly lube prevents damage to components that would otherwise occur due to metal-on-metal contact during the first few seconds after startup. The right type of assembly lube for your specific application will depend on factors such as temperature range, chemical compatibility with other materials in the system and long term protection requirements under varying conditions.

Therefore, using the correct type of assembly lube is essential if you want your engine running smoothly from day one!

What Can I Use As Assembly Lube?

Using the right assembly lube is essential for a properly functioning engine. The purpose of an assembly lube is to provide lubrication between two parts as they are assembled, reducing friction and preventing wear. There are several types of assembly lubes that can be used, depending on the type of application.

Petroleum-based products such as motor oils, heavy gear lubricants or high temperature greases can all provide excellent protection against wear and tear during engine assembly. Synthetic-based products such as polyol esters and synthetic fatty acids also offer great protection but have a higher cost than petroleum-based products.

Lastly, there are vegetable oil-based products which contain natural additives that improve lubricity without increasing costs significantly.

Whichever type you choose, make sure it’s designed for use in your specific application to ensure maximum protection and performance from your engine over its lifetime!

What Parts Need Assembly Lube?

Assembly lube is a lubricant used to keep parts moving smoothly and reduce friction during the assembly process. It helps prevent wear and tear on surfaces, as well as protecting against corrosion caused by moisture, dust or dirt.

While some parts may require special lubricants such as white lithium grease or silicone oil, most assembly lubes are multipurpose oils that can be used in many applications.

Commonly used components that need assembly lube include bearings, universal joints, suspension components like bushings and control arms, shift linkage assemblies (for manual transmissions), spark plug threads, exhaust manifold bolts/studs and turbocharger shafts/bearings.

Additionally it’s recommended for use when installing brake calipers (without anti-seize compound) and wheel bearing hubs into place. Assembly lube also works great for any other threaded fastener application where you want to ensure proper thread engagement without over-tightening due to excessive torque being applied from high friction levels between mating surfaces.

Engine Assembly Lube Shootout: Which is the Best

Assembly Lube Vs Grease

Assembly lube and grease both have their uses, but they have some key differences. Assembly lube is a thin oil that helps to reduce friction between two surfaces during assembly. It can help to protect metal from rust and corrosion, but it doesn’t provide the same protection as grease does when components are in motion.

Grease is a thicker lubricant that provides better protection for moving parts by creating an even film of lubrication on contact surfaces. Unlike assembly lubes, greases can also contain additives such as anti-wear agents or extreme pressure agents that provide additional protection against wear and tear.


In conclusion, assembly lube is a useful and necessary product for ensuring proper lubrication of moving parts when assembling engines. Its properties allow it to fill in the microscopic gaps between metal surfaces, preventing unnecessary wear and tear on engine components. While there are other types of lubricants available, none of them offer the same level of protection as assembly lube does.

For these reasons, it is an essential tool that should be included in any mechanic’s arsenal.