slight motor knock......especially at cold start up

[browntown3]

Within the past 4-5k miles our versa has developed some kind of knocking sound that isnt that loud but noticable....Startup is the worst but it never really goes away when its warm........car is still under warranty but have any of you guys had this problem ? What was the problem ? Thanks for any replies.

[led hed]

i assume your oil is at a safe level? if so, then it COULD be 'piston slap'.

the engine in my previous car, knocked when cold so bad, it sounded like a diesel.

if it worries u, have the machanic diagnosis the knock.

[NODES]

Nissan is known for this....I have the same noise, dealer said it is normal. It started at around 15KM

Funny my 21yr old Honda Civic never had that issue

[Driving Instructor]

Get used to it. No harm as long as the oil level does not drop.

I have 165000 kms and I complained about this long time ago. My words were more like this: The squirrels are getting tired........

Have fun

[Ferrofab]

I have noticed that younger drivers (not necessarily the OP) don't know the difference between a "tick" and a "knock". Having had several engines from the 50's develop a rod "knock" due to rod bearing failure, I can tell you that once you have heard and experienced a "knock" there will never be any confusion again.

Due to the increased engine reliability and advancement in engine oils, engine failure due to bearing failure is very uncommon. The term "knock" however, persists in auto lingo without any way to reference what the sound actually means. One way of describing what a rod knock might sound like is to imagine a little man inside your engine with a good size ball peen hammer smacking the side of the engine at whatever the engine rpm is. Also, this phenomenon is usually accompanied by a low oil pressure indication.

I would suggest that the little Versa engines have a tendency to exhibit a slight "ticking" sound when cold, that is probably related to some hydraulic valve lash adjuster not fully functioning. I noticed it immediately after switching to Mobil 1 synthetic after about 24,000 miles.

[Bubs daddy]

Good post, ferrofab. Indeed, some engines will have a small amount of ticking on startup or until warm which is most times no problem. I had a late 60's Chevy that had a rod knock. No mistaking it. It it loud and it is awful sounding. You know something is wrong in there.