Mainly when I first start the car it knocks pretty bad. My co-workers have asked me if I drive a diesel. I've read here that sometimes this can be caused by the piston "skirts" until they expand, or something like that.
Overall the noise tapers down some after warm up. I'm running 20w50 oil. Maybe oil pump is not working properly? I'm running 20w50 because of the age of the car.
Also does anyone know where I can purchase an aftermarket header? My header pipe has a crack and I thought I'ld upgrade when I replace the part.
Thanks!
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