Terms in this set (10) Technician A says that a cranking sound diagnosis can be used to diagnose problems in the ignition system. Technician B says that a cylinder power balance test measures the volumetric efficiency of the cylinder being tested.

A cylinder power balance test locates the cylinder causing a lack of power and not contributing to the engine’s balance and performance. The test measures each cylinder’s drop in RPM, testing its effectiveness compared to the others.

The compression test determines the maximum pressure in the cylinder on the compression stroke of the piston. The cylinder leakage test measures how well the cylinder seals. Both of these tests are conducted on the compression stroke when the intake and exhaust valves are closed.

Which of the following is one of the first steps a technician should take when a customer reports excessive oil consumption? Find out the oil consumption allowance specified by the manufacturer.

When drivers notice excessive oil consumption, white or gray exhaust smoke, poor acceleration, and/or overall loss of power or poor engine performance, they may be seeing signs of worn piston rings.

Signs your piston rings need replacing

• Excessive smoke. If the smoke coming out of your engine is grey in colour and particularly thick, then it could mean your piston rings need replacing.
• Using more oil than usual.
• Lacking power.
• Decreased performance.

The final indicator of a poor valve seal is a lack of acceleration power. You can also perform a compression test to see if this is the case. A higher level of compression will indicate that it’s a valve seal problem, while a low level of compression will indicate a piston ring problem.

The symptoms of bad valves include:

• Cold Engine. A cold engine test will give you a good idea if your valve seal is faulty.
• Off-Throttle Braking. Engine braking involves employing different means to slow down your car asides from the external braking.
• Idling.
• Excessive Oil Consumption.
• Excessive Smoke.
• Loss of Engine Power.

Burned Exhaust Valve Symptoms

• Ignition Misfire. A misfire can sometimes be an indication of a burned exhaust valve.
• Power Loss. Power loss can be another indication of a burned exhaust valve.
• Puffing or Puttering Sound. A burned exhaust valve will often make noises that sound like a puff or putter.
• Failed Emissions Test.

100,000 miles

you could have the valve(or all the exhaust valves) and guide replaced by a machine shop, and swap it yourself for $1000-1500 depending on what you do. or you could buy a used head and save even more money than that.

Wet Compression Test Diagnosis If the compression increases, the piston rings are at fault. Burned valves: If the results remain the same, one of the valves are bad or not seating correctly. Low compression in only one cylinder typically indicates a bad valve.

A burnt exhaust valve can also reduce the performance and power of the engine. Burnt valves can tend to have huge holes that will leak out all the gases. This eventually reduces the compression, resulting in the poor performance of the engine.

If a valve is not sealing properly a compression test will show a low reading in the cylinder with the bad valve, there is however other reasons for low compression as well, things like rings or worn piston and bore.

If you discover you do have low compression, the only solution is to replace the leaking part whether it’s the piston, piston ring, camshaft, head gasket or valves.

Repair done by a professional mechanic to fix the low compression in one cylinder, will normally cost you $100 to $200. This is with the repair alone but if you consider the replacement of other damaged parts, the cost will surely vary. Repair of head gasket costs between $1000-$2000.

If you have low compression in all of the cylinders in your car’s engine, there is pretty much no way you’re going to be able to drive it. Your car should still start up for you and run. That being said, driving with low compression in one cylinder in your car’s engine isn’t necessarily advisable.

It forms hotspots on the piston and can cause holes or cracks in the piece. When holes and gaps form between the piston and the wall, they allow the gases to leak, resulting in low engine compression. Components that can trigger hotspots include gas with a low octane, bad spark plugs and malfunctioning fuel injectors.

Generally speaking, if you have low compression in one cylinder, the engine will start but you’ll likely experience misfires and your vehicle will run rough. If you experience no compression in ALL cylinders, your engine simply won’t start.

Will an engine run even with low compression? This depends on the cylinders that have low compression. If only a single cylinder has low compression issues, the engine will likely run. However, you’ll notice a decline in engine power as you drive, and you may not be able to operate the car in some terrains.

No. “Bad” (fouled, cracked, worn) plugs can cause a number of ills, but have no effect on compression. Compression is the degree to which the incoming charge of fuel/air is compressed by the rising piston.

Yes it can have good compression and bad bearings (or oil pump).

The compression does not have to drop to zero before the engine fails to start. It varies but once it starts getting near 100-110 PSI it could leave you stranded. It’s definitely not a car to take on a long trip.

No compression in all cylinders is also caused by a broken timing belt or a broken camshaft, while low compression in all cylinders can be traced to damaged piston rings. A dropped valve seat, damaged valve spring, a damaged valve, and a dropped valve can all lead to no compression in one cylinder.

One of the most common ways that your cylinder head can fail is by cracking and when that happens you could be looking at a repair bill that may cost you anywhere from $500 to $700. The cost of repairing your cylinder head can vary greatly based on a number of different factors.

To costs of fixing a dead cylinder will vary depending on the car make and model, but in general, costs are between 200$ and 350$ for the cylinder and another 150$ to 250$ for the labor.