Valve Train

A valve train is an engine’s breathing system. It is a mechanical system of components (camshaft, lifters, pushrods, rocker arms, valves, springs) that precisely controls the opening and closing of intake and exhaust valves. Also synchronizing air/fuel entry and exhaust expulsion with piston movement for efficient combustion in an internal combustion engine. Driven by the crankshaft, it dictates engine performance. There are designs like (SOHC) (Single Overhead Cam) or (DOHC) (Dual Overhead Cam) affecting complexity and efficiency.

Choose Your Danny’s Engineportal Help Topic Below

Valve Lash Setting – Top End Ticking Noise, Usually The First Sign

Valve Lash Setting For Quiet Engine Performance

Valve lash setting, is something most drivers don’t even think about. First, you need to know if you even have an adjustable valve train for valve lash setting. In most cases, you will not have […]

Valve Guide Wear – How to Identify and Reduce Oil Consumption

Valve Guide Wear – How to Identify and Reduce Oil Consumption

Valve guide wear, refers to excessive clearance, between valve stem and guide. As the guide wears, the side to side movement, can cause valves to seat improperly. As a result, requiring you to need a […]

Pushrods On G.M. 3.1-3.4 Engines - This Is Where Length Matters

Pushrods On G.M. 3.1-3.4 Engines – This Is Where Length Matters

Exhaust and Intake Pushrods, on G.M. 3.1 and 3.4 engines are different lengths. So, quite often we still see bent push rods and valves, when they are mixed up. Consequently, Exhaust pushrods on G.M. 3.1 […]

Valve Springs Can Cause, Floating Valves and Pumped Up Lifters

Valve Springs Can Cause, Floating Valves and Pumped Up Lifters

Valve Springs, have a very basic job, but how they do it, is very important. By the time they have 100,000 miles on them, they have probably lost up to 10%, of their tension. The […]

Automotive Engine Valves: Function, Failure, and Testing

Automotive Engine Valves: Function, Failure, and Testing

The main function, of automotive engine valves, is to let air in and out of the cylinders. Above all, the valves in your cylinder head, are a vital part of your engine and undergo, enormous […]

Listening for Valve Train Noise Under Hood

Valve Train Noise – Where Is It Coming From ? – Is It Bad ?

Valve train noise, is usually due to excessive clearance, between two internal engine parts. Each valve utilizes, a valve spring that returns it to its, original closed position. So, if a valve spring has broken […]

Valve Lash - Getting All The Facts For Setting And Adjustment

Valve Lash – Getting All The Facts For Setting And Adjustment

The term “valve lash” is often used when talking about, valve train adjustment. A valve lifter follows the contour of the camshaft lobe, and transfers that motion to open and close the valves. (sometimes referred […]

Rocker Arms Dislodging - Along With Valve Seats Falling Out

Rocker Arms Dislodging – Along With Valve Seats Falling Out

Rocker arms dislodging on certain engines, is a common problem and is usually misdiagnosed. So, a customer comes in and complains of a poor running engine. After diagnosing it, you find engine misfire codes. And, […]

Interference Non-Interference Comparison

Interference Or Non Interference Engines, Timing Is Everything

So, the term, interference or non-interference engine, makes a big difference, if you ever have a timing problem. And, if you ever have a broken timing belt or chain !! The cost of repairs for […]

Engine Noises - Where Are They Coming From - Are They Bad

Engine Noises – Where Are They Coming From – Are They Bad

So, with a little practice, you can gain the experience and knowledge to know, what engine noises mean. You should always take the extra time, to make a proper noise analysis, before doing any engine […]

COPYRIGHT © 2026 Danny's Engineportal by Danny Bender - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". Most of the images displayed are of unknown origin. We do not intend to infringe on any legitimate intellectual right, artistic rights or copyright. If you are the rightful owner of any of the pictures/wallpapers posted here, and you do not want them to be displayed or if you require a suitable credit, then please contact us and we will immediately do whatever is needed either for the image to be removed or provide credit where it is due. Thank You !