![]() TEST 1: Is The Engine Oil The Color Of ‘Coffee With Too Much Creamer’?īefore you start, I suggest you take a quick glance at all three tests. The engine oil is thick and tan to off-white color (mixed with coolant).You know it's not a lack of fuel, because you have verified that the fuel pump is delivering fuel to the fuel injectors.You have already verified it's not an ignition system problem because you have spark coming out at all of the spark plug wires.Your 4.3L, 5.0L, 5.7L GM van (or mini-van, pick up, SUV) won't start.White smoke is coming out of the tail-pipe and it smells like anti-freeze being cooked.You know it's not the fan (or fan clutch) or thermostat. Your 4.3L, 5.0L, 5.7L GM van (or mini-van, pick up, SUV) is overheating.The most common symptoms a blown head gasket are: 3) Thermostat went bad and is stuck closed and the coolant could not circulate. The most common cause of a blown head gasket is that the engine overheated because: 1) Fan clutch is not working, 2) All of the coolant leaked out of the engine and you kept driving it this way. You can find this tutorial in Spanish here: Cómo Probar Los Empaques De Las Cabezas (GM 4.3L, 5.0L, 5.7L) (at: ). TEST 3: Checking For a Blown Head Gasket with an Engine Compression Test.TEST 2: Are Engine Compression -Exhaust Gases Coming Out Of The Radiator?.TEST 1: Is The Engine Oil The Color of ‘Coffee With Too Much Creamer’?.If your Chevy or GMC pick-up, van, or SUV's engine IS NOT burning oil: Then more than likely you'll be able to go the 100,000 miles the spark plugs are advertised to last.ĭepending on how many miles you put on your vehicle, you may be replacing the spark plugs anywhere between 3 to 6 years. ![]() This means you could be replacing the spark plugs in a few months or maybe in a year. More than likely, you've got a spark plug that has it's air gap (between the center and side electrode) plugged up with carbon. If your Chevy or GMC pick-up or SUV's engine is burning oil: You'll need to check the spark plugs when the engine starts to miss (or misfire). So when you should replace the spark plugs? -Here are my recommendations: No, it simply means that the older the engine gets, the more likely the spark plugs are gonna' get plugged up with carbon from oil burning in the cylinders or from additives added to the fuel. This doesn't mean that, because your engine has a lot of wear and tear, the spark plugs are wearing out faster. If like most folks, your Chevy pick up, van or SUV's 4.3L V6, 5.0L V8, or 5.7L V8 engine has over a hundred thousand miles, then you're gonna' have to replace them at a much smaller mileage interval. Yup, the only time they're gonna' last 1000,000 miles was when you're Chevy was brand new and you drove it off the lot with 5 miles on the odometer. Now the bad news is that the 100,000 mile replacement rule only applies if you're driving with a brand new engine in your pickup or SUV. Of course there are exceptions to every rule.Ĭhevy pickup and SUVs covered by this article use platinum spark plugs and these bad boys don't have to be replaced very often.Īs a matter-o'-fact, these platinum tipped spark plugs are usually billed as lasting 100,000 miles- but this may not apply to your vehicle. Spark plugs can go years without having to be replaced. The cool thing is that you don't have to replace your spark plugs very often (like for example: every time you change the oil). ![]() Changing the spark plugs is just part of the vehicle ownership experience (whether you do it yourself or you have a shop do it). In a nutshell, the thing that will wear out the spark plug, is the spark that has to jump from its center electrode to its side electrode.īy the time the spark plugs have worked flawlessly for thousands of miles under the extreme temperature they're exposed to inside your engine's cylinders, the spark will wear out even the most durable metals on the planet.Īnd well, this is normal. Can A Spark Plug Cause A Misfire And Misfire Trouble Code?.Which Spark Plugs Should I Buy: AC Delco or Brand X?.
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