Threadlockers, Studs and Carburetor Installation

    November 13, 2014

Studs are often used for accurate positioning of auto parts, such as carburetors, water pumps, and manifolds to make the assembly job just a little easier.  Studs assure that carburetors stay perfectly sealed to the intake manifold, and aligned with the gasket or sealing surface to help the assembly remain resistant to loosening from vibration and eventually leaking or sucking air.

Studs come in different heights and lengths, to accommodate different combinations of carburetor and spacer. By using threadlockers (such as Loctite Blue Threadlocker 243) to install these studs, you know they are being installed at the correct position for proper installation of the carburetor or whatever component is being assembled.

Here you see positioned studs holding the carburetor:

studs carburetor

And here studs are being used on the water pump and pulley system on the front of the engine. This was a critical application, as the studs had to be positioned at the right distance to properly hold the water pump and attach the additional bracketry for the power steering pump/reservoir, alternator, and belt tensioner. 

front drive installation

Threadlockers are also beneficial in front drive system installation, like this one on my Chevelle motor. The assembly instructions from the manufacturer, Concept1, specify the use of Loctite threadlockers

front drive system

In addition to studs, Loctite 243 Threadlocker can also be used for such applications as oil pans, disc brake calipers, pulley assemblies and many more.

About the Author, Loren Nauss

Loren Nauss is currently Business Development Manager for maintenance chemicals at Henkel. In his 24 years of experience, Loren brings expertise in everything mechanical to his personal and work-related projects. Loren's built, assembled and fabricated American and foreign cars, trucks, motorcycles, manufacturing, processing, and pumping equipment. He earned a Bachelors Degree in Business from Eastern Connecticut State University.

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2 responses to “Threadlockers, Studs and Carburetor Installation”

  1. Dave Tomney says:

    I need to put a threadlocker on a motorcycle exhaust pipe. A bolt seals an unnecessary hole (some bikes require the hole, mine does not. ) Which specifically heat resistant type would be best for such an application ? Thanks.

    • Brandon Gearing says:

      Hi Dave, thanks for your question. Without knowing your requirements for thread size, strength required, etc. we suggest the following options:

      450 degrees F:
      Loctite 246 – removable strength (item 29514, 50ml bottle)
      Loctite 272 – high strength (item 27240, 50ml bottle)

      650 degrees F:
      Loctite 2422 – removable strength (idh 1134601, 30ml syringe)
      Loctite 2620 – high strength (idh 1138282, 30ml syringe)

      Hope that helps. – Brandon

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