Zaiya M asks:
I have an 07 altima 3.5 SE, and when started after being off overnight, there is a clicking sound in the engine compartment when I start driving. But then I never hear it again until it hasn’t been driven for a while.
Answer by Sally R
Sounds like it could be lifters (the things that open and close your valves). You may have a faulty oil sending unit. After the lifters warm up/get enough oil, it quits. The oil stays on them between short starts and stops, but when it sits, they dry out.