Will it hurt to drive my car with a cracked manifold gasket? I have a 2005 Chevrolet Trailblazer. I have the replacement but the mechanic can't replace it until Monday and I don't want to do any damage.
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A manifold gasket leak will cause a power loss everywhere you drive, although a hot engine may lose more power than a cold one. You can check you spark plug color. A manifold leak makes a lean mixture so the plug should show the typical white-ish deposits.
Your symptom is vague. You could be talking about a bad lifter or crank bearing. A cracked/damaged flywheel or toque convertor could be to blame as well. Also a broken exhaust manifold or blown manifold gasket could be what your talking about too. Please write back with what you have inspected or tested so far. They sell a tool called a stethoscope. This tool is great to help pin point mechanical noises. Look into one, it may help you. Write back anytime if you have more questions, good luck.
Tbi cleaning alone won't fix it. The entire intake (big black plastic intake manifold) needs to be removed and cleaned. Also clean any soot on the head intake runners. And replace intake gasket. Be sure to remove all sensors from the intake before you clean it. Use rags that won't leave lint behind and intake cleaner.
Take it back and have the heads redone. Sounds like they left oil seals out or they didn't find a crack in the other head. It is very unusuall for oil to come from the exhaust and not smoke. And if the oil is coming from the exhaust gasket ,then the mechanic also didn't do his job right. This gasket should be tight, no air or anyhting else should be coming from between the engine and exhaust manifold. The never timed it is impossible, as it has to be timed to run. I would probably take it to anoher shop, explain what has gone on, get an estimate to fix it. And demand the other shop pay for it.
usually a sign of a blown head gasket or intake gasket or, gulp a cracked head or block. Check your engine oil for a milky color, This would confirm a blown head gasket. There is a test to determine if hydrocarbons are in your coolant. If your coolant level is low or empty, this is another sign.
do you mean the valve cover ? because I don't think you can have the intake manifold backward.(if it's backward, you cannot connect the upper hose and the fuel lines)
so any way, it sound like you have the valve cover swapped. it won't hurt to drive but it is a problem to fill the engine oil as you stated.