1991 Dodge B250 Van.......318 engine.....Blue smoke burning oil question......Over 300,000 miles on this engine........I have noted the blue smoke from starting and from pulling away at lights in my exhaust.When I go to clean or replace spark plugs, they are not at all oiled or fouled.....light tan to grey and not oil fouling at all......The Van does not owe me anything, but it starts, stops, passes air testing regulations.....and I have put a new catalytic converter on it within the last year...( got it at a giveaway price).......Can you advise if this is a rings wearing situation, valve guide wear problem or valve stem oil seal problem?If I take it in for a compression test, does the oil squirt in the cylinder really tell anything about the ring condition if the plugs are not fouled???I burn about a quart every 600 miles..............
Country: CanadaMake: DodgeModel: B250Year: 1991Engine: 318
Hello welcome to JustAnswer, My name is XXXX XXX I will be assisting you. To find the source of your oil burning you will need to perform a compression test to get an idea how well the combustion chamber is able to seal.. Next you will need to perform a leak down test.. A leak down test will tell you if it is rings, valves(And which one). Do you know how to perform both of these tests? Click HERE to learn more about the leak down test.. And when you perform thr compression test if it is low and you add a spoonfull of motor oil and compression goes up, it is faulty rings..If you need anymore assistance, feel free to askBrad
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One related question....Could a warped head allow oil that would normally pass through the head and into the block, get into the combustion chamber, burn and get to exhaust...???? I am really puzzled that the plugs are not fouled ......
I would not think that it is a head gasket issue as it runs fine and does not skip at all... After reading your issues I think that you have valve seal issues.. I say this because you said that it runs fine and smokes after taking off at a red light. And you didn't say but I bet it smokes after starting it up.. The reason you don't have a build up on the plugs is becuase that the oil consumption is not exessive and is burned right up.. Most of the time when rings are faulty is causes the spark plugs to cake-up with oil because the oil is constantly being burned, in your case it is only when you take off and after it has been idling..With 300,000 miles you would tell a difference if fuel mileage and performance if you were to remove heads and get a valvejob performed.. or you can just remove the valve covers and pressurize the chamber and replace the seals..Thanks,Brad
What would an estimate in hours be, to do the valve stem oil seals, (318 engine) keeping in mind this is a van and there is not a lot of room to around in the engine bay inside and under the dog house- engine cover.....???Rating to follow as excellent, 100% with your answer........
Here is the instructions:
15 Yrs Chrysler/Dodge Technician..ASE Master Certified(L-1)