Chrysler Repair: Car smokes when i give it gas, piston rings, definitive evaluation

Question
Hey roland thank you for the advice well i got a 98 model car 100854 miles and it smokes a little sometimes it will smoke when i start it up but sometimes it wont and after its started it will not smoke at idle and if i stomp on it,itwill smoke blue gray smoke also if i keep the gas on it at a steady high rpm it wont smoke only when i stomp on it and sometimes when i start if it sets for awhile i dont know its the vavle seals or the rings and groves are worn or the cylinder walls are worn i dont know but im leaning more to vavle seals but i wanted to ask a expert and if that stop smoke will work or what should i do like vavle seal replacement or just rings i have no clue please help thank you again

derek

Answer
Hi Derek,
I suspect valve guides or seals as the sounce of the oil burning. The engine is a little young to have problems with the piston rings. But you can check that by doing a compression test on the cylinders after warming the engine then pull all the spark plugs and see what compression readings you get. Then put about a teaspoon of engine oil in each spark plug hole, one at a time, and remeasure the compression. If it doesn't change significantly then it isn't the rings that are causing the burning. What happens with guides and seals is that dependiung upon where the engine stops when you shut it down for some hours or longer the oil around a leaky guide or seal will slowly enter the combustion chamber and then when you start it up it will burn that oil. That is what you see at start up and why it varies. Also when you decelerate and then hit the throttle the oil sucked in around the valve stems again is burnt. So I would do the dry and wet compression test to verify that the rings are o.k. to make a definitive evaluation.
Roland