PCV System: Sometimes Things Just Have To
I am certain that each and every one of you have, at some time in your life, experienced the horrific event of having the “wind” knocked out of you. If you can remember back to the first time it ever happened, before you knew that you would in fact breathe again, it was like you
Tips for ‘Pickling’ Your Classic Car/Engine for Winter Storage
Here are some engine related tips for "pickling" a car for storage: 1.) Make sure your gas tank is full. Additives like STA-BIL will help aslong as you run the engine to get it throughout the fuel system. 2.) Make sure your coolant mixture is correct – even if your car won’t be stored under
Importance of Manually Dressing Crankshaft Grinding Wheel
Mount the wheel dresser on the grinder table. Bring the rotating grinding wheel up close to the diamond and start the coolant flow. Never dress without coolant. Frictional heat buildup can cause the diamond to come loose or separate from its mount. Lack of lubricating properties, along with cooling, abrades the diamond needlessly. Best results
How to Grind V8 OHV Engine Cylinder Heads
If the cylinder head is machined and over .010? is removed, the holes in the intake manifold and the cylinder head will not line up when reassembled. To correct this condition, it is necessary to machine surface "B". The amount that must be removed varies with the degree at which the head is machined. The
Caution When Press Fitting Aluminum Timing Gears
When timing gears are subjected to extreme temperatures, the aluminum gears do not return to their original dimensions after cooling. The result is a loose fit between the gears and camshaft. Under no circumstances should aluminum gears be heated with a torch. –Tech Tip courtesy of Hastings Manufacturing
Caterpillar Piston Manufacturers’ Casting Numbers vs. Part Numbers
Depending on the manufacturer, one piston casting could be used formore than one final part number. Example: 1073565 casting being machined into a 1073565 (piston withone valve relief) or into a 1654262 (piston with two valve reliefs) Examples of another manufacturer’s casting numbers recorded that are also active part numbers are: • 7E7600 (3400 series)
Cavitation
Tiny air bubbles are formed during normal engine operation and implode at an extremely high temperature and pressure and eat into the wall of the cylinder (see Figure 1). This erosion eventually penetrates the cylinder wall allowing coolant to enter, contaminating the oil or even causing the engine to hydrolock. The liner O-rings are also
Converting Common Surface Texture Measurements
The irregularity of a machined surface is the result of the machiningprocess including the choice of tool, feed and speed of the tool,machine geometry and environmental conditions. This irregularityconsists of high and low spots machined into a surface by the tool bitor a grinding wheel. These peaks and valleys can be measured and usedto define
Influence of Grooved Main Bearings on Performance
It’s essential to understand that bearings depend on a film of oil to keep them separated from the shaft surface. This oil film is developed by shaft rotation. As the shaft rotates it pulls oil into the loaded area of the bearing and rides up on this film much like a tire hydroplaning on wet
Finishing Valve Seats on Today’s Multi-Valve Cylinder Heads
Use a more gentle approach when grinding valve seats. You may have asked this before when working on multi-valve cylinder heads: "What is happening to my valve seats? I’ve tried everything! A new stone, stone holder, pilot and even a new dressing diamond but I can’t achieve seat alignment." The problem lies more on technique
Compression Ring Seating: When is a Piston Ring Seated?
So when is a piston ring actually seated? For a compression ring to seal against the cylinder wall it is important that line contact be established. The sketches below Illustrate cross sections of two popular types used in many ring sets. As can be seen in the illustrations, both the barrel face and the taper
Moly-Based Coating Conflicts
Molybdenum Disulfide is also used in CV and universal joints as well as on bullets for easier passage through the rifle barrel, allowing the barrel to retain ballistic accuracy much longer. However, if you build an engine that uses a moly-based coating you need to be selective about the type of break-in oil you use