my car is a 95 chevy lumina and it was in a bad car wreak should i just rebuild...

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carcrazyfool14062

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...the engine? the body is in perfect condition but my engine has a running problem and it lacks power it also is the same car that has the oil around the threads but not the end of the spark plugs problem.will changing the valve cover seals and the rings fix that problem?
the car only has 87,000 on it i ony got it for 150.00
one of my spark plugs is cracked is that the problem
 
Usually the oil in the treads are from leaking valve cover gaskets.[outside the engine] Like you said it is not on the tip.
Repair the gaskets.

"BRILLIANT"!!!!
 
it would be cheaper just to get a low mileage engine from the junk yard. strip your old engine down and save the parts.
 
There comes an age of a vehicle where you ask if the cost of the repair is greater than the replacement cost for the vehicle. For over 10 year old vehicle, perhaps well over 100k miles, if you have a pile of problems it is time to retire it and replace it.

If you do need to service it, we don't really have good evidence to tell whether replacing valve cover seals and rings will fix all your problems.

A problem with power might be a problem related to delivery of Fuel, Air or Spark. Look at each of these systems and check out the basics.

Fuel Filter - is it OK
Fuel Pump - is it working OK?

Air Filter - is it OK shape?
Air ducting, intake manifold - is it free of Vacuum Leak (empty/missing fittings)?
Fuel Mixture is all 'puter controlled now, but you may put your hand over the exhaust pipe with the engine idling, and see if it feels "even", and smell your hand, do you smell gas? oil?

Spark Plugs - removing each plug and remember which cylinder each is from... is the color and wear on each plug nearly identical? All plugs should read light brown. If any one plug shows a different color, that indicates a problem local to that cylinder, which might be bad ring or bad head gasket or bad valve or any such thing, a matter of further investigation. But anyway if all the plugs read similar to each other, then this sort of eliminates the diagnosis of a problem with a particular cylinder.

I can't really make sense of what you are saying about oil on the threads, I don't find it meaningful. What is important is the part of the plug IN the combustion chamber. And when you put the plugs back make sure you put each into the same cylinder it came from, and put oil on the threads.

Also, with engine idling, and hand on gear shift or some place you have a good sense of engine vibration, is engine firing on all cylinders evenly? Do you notice any miss?

Intermittent miss may be bad plug wires... I had an engine down on power and noticed great benefit from new plug wires. Plug wires work good for about 30-50k miles, if yours are older than this consider replacing them.

Hmm, if one plug has oil on the threads and the others don't, it might be that plug just plain isn't firing, the plug wire or distributor on that cylinder is bad or something.
 
In most new cars it is cheaper to get an engine from the junk yard, depending on how many miles (say 250,000), whould answer your question. You might also want to ask yourself how much money you want to put in that car, say you replace/rebuild your engine the Transmission will go next if it is an automatic. Actually in that case it may be the transmission slipping insead of the engine.
 
I thought the car was involved in a 'bad wreck'? How can the body be in perfect condition and the engine have so many issues?
 
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