Aug 13, 2009 by Elbisivini | Posted in Maintenance & Repairs
1. While troubleshooting an engine in a car with a low oil pressure warning light illuminated, two technicians remove the oil pressure sender and install an oil pressure gage. They then start the engine and observe that the oil pressure gage indicates
Answer to first question - find new techs , but first change the sending unit . If still low pressure , will need to change gauge .
Second question - should be at least 2 oil changes .
Third question - either tester gauge bad or leak in
joe.rakoczy@sbcglobal.net | Aug 13, 2009
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Steps and Frequency of Changing an Oil Filter
It is important to change the oil filter regularly. Most manufacturers recommend this and you should therefore check the owner manual. This is because the oil filter is the main protection of the engine crankshaft and the cam bearings since all the oil coming from the oil reservoir to the engine has to pass through a filter in newer models whose engines use the full-flow filtration process. The filter removes unwanted solids such as metal particles, carbon and dirt. Lack of a properly functioning oil filter can lead to premature engine damage. However, you should note that the oil filter can be difficult to change for an untrained person and doing it wrongly can cause damage to the surrounding components.
For such a simple-looking device, the oil filter can be surprisingly difficult to change. The ease or difficulty of replacing a filter depends on such things as the degree at which it is mounted, on the size, on the location, and on how it was installed. The oil filter accumulates debris over time and it reaches such a point that oil cannot pass through it. You should change the filter before this stage because filters have a bypass valve, which means oil will flow to the engine without being filtered.
Different car makers recommend different frequencies of changing oil filters. The main reason for this is that they are worried about their reputation. For most manufacturers, the recommended time for the change is once every 6000 to 15000 miles. Other manufactures recommend that you change the oil filter while you are changing the oil, but this is an expensive option for most people. You should change an oil filter more frequently if you doubt the cleanliness of the oil – always get your oil from a credible source and make sure it is the oil that the recommended by the manufacturer. An oil filter will only cost you about ten dollars while a new engine will cost you about $1,200. It is therefore unwise to risk your engine by staying with the same oil filter for too long.
