Sealey Vs518 Spark Plug Feeler Gauge - Metric

Product Information

We already have a spark plug gap tool, but sometimes small-sized pliers, wrenches, or mallets also can be used to correct that gap slightly. Step 4: Place Gauge Between Electrode Angled feeler gauges are ones whose tips are bent over at a slight angle to the rest of the blade. This can be handy for accessing harder to reach gaps, where it may not be possible to slide a standard gap gauge in straight enough to get a good reading on the width of the opening. They are also known as offset feeler gauges. Feeler Gauge Sets

Blade length – Standard blade lengths are typically around 3-5 inches, but long blades might be 12 inches and shorter blades around ¾ - 1 inch. Measurements that involve the use of a feeler gauge are generally very small and are always very accurate. Auto repair technicians need accurate gap measurements when working with spark plugs, distributors, or valves. Buy a set of precision gauges for measuring difficult to reach gaps in some parts. These feeler gauges come in a variety of sizes, from 0.0015 to 0.035 inches. Place the gauge in the hole in the tip of a spark plug. Use the size indicated for the size of the gap, according to the manufacturer. If the gap is too wide, adjust the spark plug so that the feeler gauge is tight but can slide in and out of the gap freely. If the gauge does not fit, increase the gap enough so that the gauge fits snugly. Manufacturing Use If the thread is cylindrical, we measure any thread from crest to crest. Whether the thread is tapered, we measure the fourth or fifth thread from crest to crest. 04. Measure the Pitch of the Thread

The number of blades or leaves – Different feeler gauge sets will feature different numbers of blades. On the low side, 10 or less, with 13, 15, 25, 26, 31 being more common blade counts, all the way up to over 100. It is mainly used when measuring the gap between the segment ring and the piston of an endothermic combustion engine or the gap between two gears. Correctly gap your new spark plug. Your original spark plug may come pre-gapped by the manufacturer. These plugs have a designated ignition gap, heat range, and torque that works for your engine. A new spark plug may not have the same gap size, and if you install it with a smaller or larger gap, you may notice a significant decline in your engine’s performance.

We are sure now you have learned properly how to read a feeler gauge. This tool is produced and tested according to specific standards.However, for many standard engineering and mechanical applications, tempered or stainless steel is often the preferred material. Brass can also be a good option if you need something durable, but somewhat softer and less likely to scratch than steel. English vs. metric sizes – Feeler gauge sets are available in both decimal inch sizes and decimal millimeter sizes. To learn more about the other varieties of gauges, see our related guide covering the types of gauges. What is a Feeler Gauge?

Achieve better spark plug performance. The size of the gap of a spark plug determines its firing performance. The gapping tool will help you manually open the gap to the exact factory measurement recommended in your owner's manual. That way, you boost the efficiency of the spark plug in putting out a large enough spark to ignite the air and fuel mixture in your engine. A feeler gauge is a tool that is used to measure gap width. Here in the following guide, we are going to learn how to read a feeler gauge. Gauges establish a distance between two points. The device consists of multiple sheets or wires sized to exact dimensions marked on the surface of each blade or at the base of each cable. As well as, when repairing or replacing spark plugs, a technical service center measures or establishes the distance between two electrodes by using a feeler gauge. Now that you know that there are different models of gap gauge, you need to evaluate which is the most suitable for the equipment you want to measure.The CTA Tools Spark Plug Gapper has a heavy-duty construction built for strength and durability. It’s made up of a die-casted metal to harden the steel and increase the accuracy of the unit. It can be used for measuring and readjusting the spark plug gap. The gauge is calibrated in the imperial system, and the size markings are laser etched on the rugged steel construction. Prevent burnt electrodes. Used spark plugs may have a slight discoloration at the electrode (negative probe). Further inspection may reveal that the gap between the ground electrode and the center electrode is wider. If the gap is not properly aligned, the electrode will continue to discolor and will eventually burn away. The specific feeler gauge sizes included in a set depend on the number of blades in the set as well as whether the feeler gauge set is an English or metric size set. A representative set of feeler gauge sizes for a decimal inch set is shown below in Table 1, and a decimal millimeter size set is shown in Table 2. These are based on a 25-blade count set – other blade combinations and sizes are available.