Valve guides
Cylinder Heads

Valve guide wear-What to fix and why?

April 8, 2017

Valve guide wear refers to excessive clearance between valve stem and valve guide. As guides wear, the side to side movement can cause valves to seat improperly. Valve leakage causing compression loss is another reason […]

Head cracked
Coolant Leaks

Cylinder head cracking-What can cause it ?

March 14, 2017

Cylinder head cracking can result in catastrophic damage to the engine. In some cases, cylinder head cracking may be so severe that replacing the complete engine is the only cure. The causes of cylinder head […]

Rocker arm dislodging
Cylinder Heads

Rocker arm dislodging with valve seat falling out

February 20, 2017

Have you ever had a customer come in and complain of a poor running engine? After diagnosing it you find engine misfire codes. To narrow down the issue you do a compression test or cylinder leak down test. […]

Valve Lash Setting
Analyzing Poor Performance Issues

Valve lash setting and adjustment

February 18, 2017

The term “valve lash” is often used when discussing valve train adjustment. A valve lifter (sometimes referred to as a tappet or cam follower) follows the contour of the camshaft lobe and transfers that motion to open […]

Head Bolts
Cylinder Heads

Torque to yield bolts-What are they

January 26, 2017

Torque to yield bolts-What are they ? Torque-to-yield bolts are exactly what they sound like. When tightened they stretch to the point of yield. Common torque to yield bolts are being used to hold, Cylinder […]

Valve Train Noise
Cylinder Heads

Valve Train Noise-What is it ?

January 15, 2017

Valve Train Noise-What is it ? Understanding the Noise. Valve Train noise can also be caused by sticky valves, weak springs or excessive revving of the engine. Valve Train noise is similar to a clicking sound […]

Timing Belt
Cylinder Heads

Interference and non-interference timing belt or chain

May 31, 2016

Interference and non-interference timing belt or chain. In an interference engine, if a timing belt breaks while driving, there is a good chance that the engine might be severely damaged. A non-interference engine will stall, […]

bent-pushrods
Cylinder Heads

Pushrods on G.M. 3.1 and 3.4 engines FAQ

May 5, 2016

Exhaust and Intake Pushrods on G.M. 3.1 and 3.4 engines are different lengths.  Quite often I am seeing bent pushrods and valves when they are mixed up. Exhaust pushrods on G.M. 3.1 and 3.4 engines […]