hi,
i have 2000 obs (us impreza model), with 2.2l engine. i have recently noticed a noise from the car that is in step with the engine speed (not car speed), and at first i suspected that it's the loose heat shield, but opening up the hood, i found that it is coming from the valve covers (or thereabout). it's high-pitched, hollow metallic sound, like something light is loose and slapping in step with engine speed. it's not loud - i have to concentrate to hear it from inside the car, and, perhaps only at times. is this the lifter noise? i didn't think this model had lifters (sohc engine, i think it is). piston slap? the noise is not like diesel engine.
i would appreciate any info/tip. thanx,
dasa
to Bill Putney: i've been forwarding your 'heart-warming' story to all my friends :-)