So I have a 2007 RX8 with 69xxx miles. In the past couple months, it has started to have issues. First, it began misfiring on startup. I took it to the dealer, and they confirmed that two coils were toast. They wanted to charge me 1200 to swap them, so I had it towed home and replaced them myself (also swapped in new plugs).
The car drove well again for about 6 weeks, and then just recently I noticed that after I had let it sit for 2 or 3 days without driving it, it would chug and misfire on startup (flashing CEL) and emit a plume of white smoke from the exhaust. This would pass after about 15-30 seconds and the car would drive great. This would not happen unless the car had been sitting.
After sitting overnight, the car starts right up and does not misfire but emits a small amount of white smoke from the exhaust for a couple of minutes.
So I checked the coolant level and it was down around the 'L' line - and I had just recently checked it. So coolant is going somewhere, and there isn't any on the ground under the car.
My working thesis: there is a small coolant seal leak that allows coolant to seep slowly into the motor, and thus the symptoms are worse the longer the car sits. Surely this seal failure will get worse and worse (quickly), and I know this means the motor needs a rebuild. Please chime in if you think my diagnosis is incorrect.
My question: Where is the dealership going to try to bend me over with respect to the warranty on the motor? The car is still under the 'core' motor warranty (went into service in 2008). I want to make sure I have all my ducks in a row before bringing it into the dealer just to maximize the chances that they attribute the issue to a 'warrantied' part failure.
The car had always been serviced by the dealer until I purchased it at 58k miles. Since then, I have performed service. I've done 3 oil changes (I can dig up the receipts for oil filters). Right now, the only issues with the car are a coolant sensor that occasionally comes on (I check the coolant level frequently, it's never been low) and a CEL for a bad rear o2 sensor (the one that's there for emissions purposes). And as I stated before, I changed the coils/plugs myself with OEM/NGK. The car has never overheated during the course of my ownership, and exhibited none of these issues until recently so I am assuming the previous owner did not overheat it either.
I figure I may have to get these things taken care of before taking the car in, but wanted to get the popular opinion on everything as this is the first time I've had a major issue with one of my cars that could potentially be covered by warranty. Thank you all in advance for your help!!!
The car drove well again for about 6 weeks, and then just recently I noticed that after I had let it sit for 2 or 3 days without driving it, it would chug and misfire on startup (flashing CEL) and emit a plume of white smoke from the exhaust. This would pass after about 15-30 seconds and the car would drive great. This would not happen unless the car had been sitting.
After sitting overnight, the car starts right up and does not misfire but emits a small amount of white smoke from the exhaust for a couple of minutes.
So I checked the coolant level and it was down around the 'L' line - and I had just recently checked it. So coolant is going somewhere, and there isn't any on the ground under the car.
My working thesis: there is a small coolant seal leak that allows coolant to seep slowly into the motor, and thus the symptoms are worse the longer the car sits. Surely this seal failure will get worse and worse (quickly), and I know this means the motor needs a rebuild. Please chime in if you think my diagnosis is incorrect.
My question: Where is the dealership going to try to bend me over with respect to the warranty on the motor? The car is still under the 'core' motor warranty (went into service in 2008). I want to make sure I have all my ducks in a row before bringing it into the dealer just to maximize the chances that they attribute the issue to a 'warrantied' part failure.
The car had always been serviced by the dealer until I purchased it at 58k miles. Since then, I have performed service. I've done 3 oil changes (I can dig up the receipts for oil filters). Right now, the only issues with the car are a coolant sensor that occasionally comes on (I check the coolant level frequently, it's never been low) and a CEL for a bad rear o2 sensor (the one that's there for emissions purposes). And as I stated before, I changed the coils/plugs myself with OEM/NGK. The car has never overheated during the course of my ownership, and exhibited none of these issues until recently so I am assuming the previous owner did not overheat it either.
I figure I may have to get these things taken care of before taking the car in, but wanted to get the popular opinion on everything as this is the first time I've had a major issue with one of my cars that could potentially be covered by warranty. Thank you all in advance for your help!!!
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