Tapping noise 4cyl frontier till it warms up


#1

tapping noise in 4cyl frontier till it warms up


#2

It could be a slightly sticky valve lifter or it could be a little piston slap. If you want to chase it down, you need to determine if the tapping is at camshaft speed or crankshaft speed. A mechanic with a seasoned ear could judge this. If the noise reliably goes away on warmup, you can ignore it.


#3

If you are in cold weather, this may be a great factor.


#4

For how many seconds and did you use the right oil?