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Old 07-23-2002, 12:24 AM
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Post what is wrong with my engine. Please help

I am have problem with an 305 engine that is in a chevy silverado truck, it's not buring the oil and gas off of the spark plugs. What can I be

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Old 07-23-2002, 06:15 AM
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your coil may be weak try another one.If you get a coil from a V6 that has .080 plug gap it will be a higher voltage unit and can be recognised by three welds on the side of the frame.Another reason could be a loss of compression, how many miles on it?,especially if the plugs are oily.This might come from bad or weak rings, worn valve guides, bad valve seals or even a cracked piston,and don't rule out thin oil some people run mfgrs recommended oils no matter how many miles on the engine,and many say to use 5w20 or 10w20 these oils in an older or hard worked engines wil break down faster and because they are so thin,will slip past rings and dilute the air/fuel charge making it harder to burn all the fuel or richening the mixture.I'd try atleast a 10w40 or maybe even a 20w50 if it runs on the hot side
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Old 07-23-2002, 08:11 PM
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i agree with tom sounds like bad or no spark. did the engine smoke at all before it quit? how did it run? try taking a plug wire off put a screw driver in the socket and hold the screw driver less than an inch from a ground source you should get a spark when you crank the motor if the coils good good luck
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Old 07-24-2002, 02:58 AM
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I have change all of the electric stuff on this engine. I have also notice when I am driving for awhile my oil drops to almost nothing at all until I am going again.. I think that I have a bad engine and I need to get a new one.
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Old 07-24-2002, 09:51 AM
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you're prolly right, but,do a compression check. great@150, good above 100, all should be w/in 10 of eachother, if any are less than 90 = problems. could be something easy like valve seals or could be terminal. or anything in between (valve job) you have good pressure when you start cause your oil is thicker when it's cold if it's old. for now, i would change it to straight 50 wgt, but that won't cure it, and get a hotter range plug. need to know milage, and if it's smoking or running good. if it runs strong is probly just valve seals or guides.
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Old 07-25-2002, 08:25 PM
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sounds to me like bad rings need to start thinking about a overhoul or an exchange. i have used hotter plugs and coil but only last for awhile.
bob
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