Right, we'll begin by looking at the camshaft before moving on to the car accessories you'll require to port your cylinder head, the basics of gas flowing and cylinder head porting itself. Before we can get started, we need to strip down the engine head; remove the camshafts and camshaft pedestals, then remove the valves, valve springs and valve stem seals.
Knowing that engine valves are so important, how can we tell when one or more of them is about to go bad? And how long do engine valves last, anyway? First, let's start with a quick definition: An engine valve consists of a stem and a head, and it vaguely resembles a mushroom with its cap flipped upside down. With valves, precision is the key to optimal performance. It really is a modern ...
To do this, turn the engine with a socket on the crankshaft pulley bolt until the rotor arm is pointing to the plug contact of the timing cylinder (usually No. 1, check in the car service manual), and the timing marks on or behind the pulley show exactly top dead centre (TDC).
I would vote against an overhaul. In times past, when engines weren’t built to such a close tolerance, the “overhaul” often amounted to grinding the valves, honing the cylinder walls, fitting new piston rings, and replacing the bearings with slightly undersized bearings.
Everyone wants to avoid getting a blown head gasket, but many people don't know the primary causes of a blown head gasket and what they can do to avoid the problem now or in the future. If you have a blown head gasket and wondering what caused it, we can talk you through the two likely causes and what you can do for repair.
How to Machine Small-Block Ford Heads: Step by Step The small-block Ford has never been blessed with particularly good cylinder heads in its half-century service life. Even the Boss 302 and 5.0L GT-40 were never impressive in the cylinder head department.