So, the engine top end, is usually everything above the cylinder head gasket. This would include everything, in engines that have a overhead camshaft (OHC).
The first sign of sticking valves, is usually engine missing or running rough when cold. But, sticking valves can also simply be, the byproduct of cold-weather operation. In this case, the sticking valves, will often […]
(VVT) Variable Valve Timing, is a 2-stage, hydraulically controlled cam phasing system. So, as engine technologies improve and become less expensive; (VVT) variable valve timing, continues to improve performance and economy. Manufacturers have now adopted, […]
Cylinder head cracking, can cause catastrophic damage to your engine. And, in some cases, cylinder head cracking may be so severe; that replacing the complete engine is the only cure. But, most causes of cylinder […]
Cylinder head resurfacing, is a very common process today, especially with all the leaking head gaskets. Above all, cylinder head resurfacing, is the most common machining operation; done in machine shops to date. But, to […]
Valve guide wear, refers to excessive clearance, between valve stem and valve guide. As valve guides wear, the side to side movement, can cause valves to seat improperly. Valve leakage, causing compression loss, is another […]
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. Consequently, Exhaust pushrods on G.M. 3.1 and […]
Cylinder head gasket leaks, can cause, a variety of problems, that no one is ready to deal with. First of all, you can not see, the cylinder head gasket, without removing the cylinder head. So, […]
The purpose of the valve stem seal is, to prevent the oil from the cylinder head; entering the combustion chamber. So, the valve stem seal, plays a critical role in, controlling valve lubrication, as well […]
Valve Springs in your engine, have a very basic job, but how they do it is very important. So, one very important point to keep in mind is that, they all lose tension and weaken […]
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