I have a 2000 Volvo Wagon I have been periodically hearing a sound in the front of the car that sounds like a big rock hit the car there is no particular thing that I do that makes this happen also periodically the light comes on that the coolant is low this I have had check they found nothing any thoughts?
This sound is like a rock hitting the car - it happened this morning and it was very loud and then there were two more pops - I take great care of this wagon I am the original owner and it has had regular maintenance, oil, timing chain, brakes etc.