Don't know if I need a head gasket

Asked by Feb 19, 2016 at 03:25 PM about the 2002 Nissan Altima 2.5 S

Question type: Maintenance & Repair

Car hard to start up loosing coolant floods car
when you try to start the car. Throwing missfire
codes spark plugs look good just put on a new
valve cover and of course gasket.after all that it is
still throwing missfire codes. Need help. Lol

1 Answer

258,045

To determine if you have a head gasket leak, you have to perform a cylinder pressure test or leak down test. For the misfires, it could be one or some of the coils since you already replaced the plugs. I assume the CEL is on? Scan for the codes to determine what coil or coils are the problem.

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