Tuesday, July 20, 2010

What Are The Signs Of Warn Piston Rings?

What are the signs of worn piston rings on a 1998 Chevy Cavalier Z24 2.4L LD9 engine?
Bad rings usually cause excessive blue smoke to emanate from tail pipe AT ALL SPEEDS.

  1. ruff idle,
  2. smoking exhaust,
  3. oil soaked plugs

Most modern 1998 Chevy Cavalier Z24 2.4L car engines are built to such high standards that piston rings nearly NEVER wear out, unless from improper maintenance, or using cheap oil and never changing it.

Most cars that use or burn oil do so because of worn valve oil control seals.

Sometimes, engine sludge traps itself on the piston ring set (there are usually 3 levels of rings on a piston). A good de-sludging chemical used properly will usually get this junk off and restore piston seal.

Bad rings usually cause excessive blue smoke to emanate from tail pipe AT ALL SPEEDS.

How to test for signs of worn piston rings in an LD9 2.4L engine.

A dry compression check and a wet compression check will tell you what mechanical condition the upper end pistons, rings, valves, head gaskets of your 1998 Chevy Cavalier Z24 2.4L engine is in. Dry and wet compression test, testing and checks will tell you what you want to know and need to know about the mechanical condition of the upper top part of your engine. Specifically, compression testing can tell you if the 1998 chevy cavalier z24 2.4L LD9 engine compression is down due to leakage caused by worn piston rings, defective valves and seats or a blown head gasket.

Bad rings usually cause excessive blue smoke to emanate from tail pipe AT ALL SPEEDS.

Start by removing all the spark plugs from the engine, next if your vehicle is fuel injected you'll need to remove the fuel pump relay switch located either in the fuse box in the engine compartment or mounted to the fire wall, and then remove your coil wire from the distributor, install the compression gauge in the number one spark plug hole, crank the engine over at least seven compression strokes and watch the gauge.

the compression should build up quickly in a healthy engine.

Low compression on the first stroke, followed by gradually increasing pressure on successive strokes, indicates worn piston rings,

a low compression reading on the first stroke which doesn't build up during successive strokes indicates leaking valves or a blown head gasket.

record the highest gauge reading obtained from all cylinder tests, your lowest-reading cylinder must be within 75-percent of the highest-reading cylinder,

add some engine oil (about 3 squirts from a plunger type oil can) to each cylinder, through the spark plug holes and repeat the test.

if the compression increases after the oil is added the piston rings are definitely worn.

smell of burning oil,blue smoke from the exhaust,excessive oil consumption,oil in the air bonnet that holds the air filter,low engine compression in the cylinders,hard starting,lack of powerand the list goes on and on the simplest way is to do a compression check on the motor their should be more than 5psi difference between any of the cylinders

biggest thing is smoky blue exhaust... could also be loss in power, due to lack of compression.


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