Engine valves have gone out

The engine is a 1996 V8 Vortec. What I've been told is that 3 of the engine valves have burnt out on it. I really don't want to buy a new engine, I'd rather just repair this one. Is it possible to repair burnt valves on a 260,000 mile engine? And would you have a price estimate of what it would cost?

My car has 260000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
You more than likely do not have burnt valves unless you have been running the engine real lean for a long time. If you have not run the vehicle lean, then you may have valves that do not seal good due to the seat and valve do not seal. This requires the engine heads to be removed and the heads sent to a machine shop to be rebuilt. With the engine having over 260,000 miles, then you are going to have wear on the pistons, cylinders, rod, and crank bearings. Basically the entire engine should be rebuilt. You are looking at over 25 hours labor to remove and overhaul the motor, plus parts, and machine shop services.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Bent or burnt valves can also cause your engine to misfire. This means the engine may jerk, stall, or hesitate when your car is in motion. Your vehicle`s fuel consumption could also increase if it is misfiring due to a bad valve. These are some of the many symptoms of a bad exhaust valve or intake valve.
Exhaust valves burn when they fail to seat properly and, as a result, can`t efficiently transfer heat to the cylinder. Ultra-hot gasses scorch these valves beginning at their thin rims. This damage erodes and weakens the valves, exacerbates the poor seating problem, and dramatically accelerates wear.
An exhaust valve that may last for years and up to 150,000 miles or more in a typical passenger car engine might only last a season or two in a dirt track or drag racing engine.
Mitral valve prolapse: The most common heart valve abnormality and the No. 1 cause for mitral regurgitation, this is when the mitral valve doesn`t open and close properly.
Rough Running and Misfiring

If a cylinder has a burnt valve, that cylinder won`t seal properly, leading to a loss of compression. The engine will begin to misfire and run rough as a result.

Most homeowners only think about a water shut-off valve once there`s a water emergency. The cost to replace a main water shut-off valve typically ranges anywhere from $150 to $600, with an average cost of around $285.
Well, there`s really no set lifespan for engine valves. Eventually, theoretically, any valve will wear out if driven long enough. It all depends on how well it`s made, how hard it`s made to work, overall car maintenance and the relationship to other parts of the engine, like the timing belt, for example.
A: Failures in valves can be caused by many factors. Some of the more prominent causes include: Wear of the elastomers and/or seat seals over time. Temperatures or pressures outside the designed operating parameters, especially unexpected pressure spikes in the pipeline.
The echocardiogram is the most common test to diagnose a problem with the heart valves. Echocardiography, or echo, is a painless test that uses sound waves to create moving pictures of your heart. The pictures show the size and shape of your heart and how well your heart is pumping blood.
When you have a bad valve seal, the oil that collects at the front cover of the head will end up burning when you push on the accelerator after coasting for a while. This is apparent especially when going downhill and again will be indicated by the excessive smoke that leaves the tailpipe.
Unfortunately, damaged valves cannot repair themselves. Once the valves lose strength and can no longer function properly, your only option is to treat the compromised vein with a combination of minimally invasive surgical procedures and lifestyle changes.
Research suggests that about 75% of people with severe aortic valve regurgitation, also known as aortic insufficiency, live at least 5 years after diagnosis with conservative treatment, but only 50% live 10 years.
The average full car valve replacement cost is between $900-$2,000. A single valve replacement cost is about $100-$200.
Research suggests that about 75% of people with severe aortic valve regurgitation, also known as aortic insufficiency, live at least 5 years after diagnosis with conservative treatment, but only 50% live 10 years.
Q: Can you drive a car with a bad valve? A: The “bad valve” will not “preclude” you from driving the car, BUT the internal damage will increase with operation, eventually resulting in engine failure which WILL prevent further operation.
The diseased valve may be repaired using a ring to support the damaged valve, or the entire valve may be removed and replaced by an artificial valve. Artificial valves may be made of carbon coated plastic or tissue (made from animal valves or human valves taken from donors).

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Engine valves have gone out
ANSWER : You more than likely do not have burnt valves unless you have been running the engine real lean for a long time. If you have not run the vehicle lean, then you may have valves that do not seal good due to the seat and valve do not seal. This requires the engine heads to be removed and the heads sent to a machine shop to be rebuilt. With the engine having over 260,000 miles, then you are going to have wear on the pistons, cylinders, rod, and crank bearings. Basically the entire engine should be rebuilt. You are looking at over 25 hours labor to remove and overhaul the motor, plus parts, and machine shop services.

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Can front wheel drive car engine power rear wheel drive
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How do you replace the rear & side engine mounts without lifting out the engine? & how do you lift the engine out?
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I have a 2010 camry. I just recently replaced the engine with a 2014 camry engine. Now I have Four engine lights on. I replaced on
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