WHO'S FAULT IS IT?
1998 Pontiac Bonneville • 6 cylinder 4WD Automatic • 142,000 miles
I bought a Pontiac Bonneville SE just over three weeks ago with the engine light on. I had the codes checked at Autozone before I bought it and it was miss firing on cylinder five. Midas gave it a Safety & Emissions Test, it failed, they checked the codes, gave it a diagnostic test, they changed some wires and the engine light went out for a couple of days. I took it back and the mechanic Karl said they did something with the vacuum hoses and the light went out again. He told me to just comeback in a couple of months for an oil change. He told me it was cool. The second and third week the light was on one day, off the on, one morning, off by night. By the end of the third week after filling up the tank the car has issues picking up speed for hust a minute after leaving the highway. About 45 minutes later after it was even resting for about 10 minutes the car stopped on me while driving. I managed to get it back start and it had issues picking up speed and stopped many times before getting home. I checked the oil and Transmission fluids, they were okay. However, the car barely made it to Midas two days later. They put coolant in the vehicle and it died, the motor is gone. They said in the past three weeks I neglected to put coolant it needed in it. The car never showed any signs of overheating and I figured Midas would have saw that if my engine light was coming on and off for that reason.
March 22, 2011.
March 22, 2011.
It's always the mechanics fault. They are psychic and know everything that is going to go wrong and should have warned you. In reality, the cooling system is not monitored by the Engine Computer other than for temperature so it knows how much fuel to spray in. The Check Engine light turned on a week after seeing the mechanic. It was running fine at the shop so you think he should have fixed something so it wouldn't have a problem a week later? Most people complain about being charged for unneeded services, not failure to be charged for as yet unknown services that will be needed a week later. That's like being angry with your doctor because he didn't set your arm in a cast because you are going to break it a week from now. The Check Engine light turned on; you kept driving. We don't know the reason the light turned on. Once it does, there will be at least one diagnostic fault code stored in the Engine Computer related to the problem. That could have nothing to do with the previous problems, but since the previous problems were minor and apparently fixed, you kept driving. Later the engine didn't have enough power. Something serious was wrong, ... So you kept driving. The engine stalled while driving. At that point there might have not been serious damage yet, but we don't know. You insisted on getting the engine started again which would lead to more possible damage. There are hundreds of parts inside the engine that can fail. If the problem is diagnosed and repaired immediately, it can often be possible to avoid more damage, but since the oil and transmission fluid were okay, you decided to drive it in a barely running condition and beat it into submission. And of course it's all the mechanic's fault? Every brand of car has their share of sudden engine failure yet they were running fine a week earlier. Sometimes head gaskets fail leading to a loss of coolant. Temperature gauges don't always show that because they respond to hot coolant, not hot air. Sometimes we just have to know that it's time to stop the engine and call a tow truck. You didn't know that for at least two days. How do you expect the mechanic to know that two weeks before the problem occurred?
Mar 22, 2011.
Mar 22, 2011.
I'm sorry, I get you're saying I screwed up. Fine. However, it would be nice really explain why the car can die out so fast. The vehicle never smoked, beeped, or smelled. The engine light never stayed on or off. The last two days I had it I know the light was off. When it first had an issue with picking up speed it I could only imagine it needed a full tune up or worry it was the transmission. I was on my way home before I tried to stop and check the fluids. Again no smells, smoke, or lights. I really didn't drive it far when it first cut off on me. I can even give the intersections: Prairie & N. Broadway to Sullivan & Vandeventer in St. Louis, MO 63107. I explained what happened to Midas and only tried to take them the vehicle. Again not far. If you reread what I wrote before, Midas had the vehicle three times. The way he explained to coolant issue took some time. How can I have made so much damage with out the vehicle giving any warning at all?
My concern is not really what you did or didn't do. It is that I read too often that mechanics get the blame for everything that happens to a car after they do any work on it. There are bad mechanics just like there are bad doctors, bakers, accountants, and teachers, but mechanics are held to the highest standards and the entire industry gets a bad reputation from the few bad ones. While there's always the possibility your mechanic caused some damage, given the description of the events, I think it is more related to 1) unfortunate timing, 2) a mechanic who understands cars but not how to explain problems to people, and 3) a car owner who doesn't understand the complex operation of the vehicle's systems. When the first one happens, mechanics get blamed, usually unfairly. When the second one happens, people can "hear" the wrong information even though the mechanic might know what he's doing. Good mechanics with good customer skills tend to be promoted away from fixing cars leaving just good mechanics who can't explain things very well so you can understand them. As for the third problem, cars are so unnecessarily complicated today that no one can be an expert on every system on every model when they keep changing every year. Doctors have it easy. They only have to learn two models in varying sizes. That never changes. Since it is impossible for mechanics to understand everything about every car, how can an owner be expected to know more about their car than the mechanic? As for the overheating problem, a head gasket either leaks or it doesn't. One day coolant can be getting drawn into the engine and burned but the day before the engine would have run fine. There is no way to know when that is going to happen except to say that it's more common on some cars than others. It is more common on newer cars because the the engine block is still made of cast iron but the cylinder heads are made from aluminum to save weight. Those are the three main parts of the engine that everything else is attached to. Because they are made from different materials they expand at different rates when they heat up. That makes the head gaskets' job real difficult. To make it worse, a corroded head gasket that starts to leak unexpectedly can lead to overheating, OR, overheating can lead to warped cylinder heads that prevent the gaskets from sealing. Either one can cause the other. When you KNOW the engine is overheating, the proper thing to do is turn it off and let it cool down. But if the head gasket started leaking first, there is nothing you can do to prevent that. Without knowing all the details of the last mechanic's inspection, I can only suggest that normally an entirely new engine, used engine, or even a total rebuild is not required. Replacing head gaskets and having the cylinder heads checked for warpage and cracks is normally sufficient and is a very common repair although it can be somewhat expensive. For some engines this is a common problem; for some it's not so common so it's impossible to know when this might occur. There is a test mechanics can perform at the radiator to check for one type of head gasket leak when it is still small, but that is normally done in response to symptoms or running problems that are already occurring.
By the way. I was in St. Louis three years ago for a Federal Mogul suspension and alignment school. Ran into a lot of really friendly people.
Thanks. The mechanic at Midas wasn't sure if it was a head gasket or block. He felt it was better to get a rebuilt engine. I will ask him again more carefully to see what to do with the car.
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