Cam belt was done 28 k ago. When its ticking over warm at 700rpm its as steady as a rock but I hear this faint noise at a low frequency that can only be described as like you know what. I think it is maybe a sticky patch or something on the cam belt because it is slow enough repeating to be coming from the cam belt once per revolution around the cams and crank etc.

 

Anybody heard anything similar? I'd hate for it to be the noise before the bang bang bit when the belt breaks.

 

And what is the easiest cover to get off to take a good look at the cam belt condition?

Willie

I took the left hand top cover off by removing the screws, 5 mm allen ones and i think 8 or 10 mm socket sizes and the small bracket for the wiring along the front of the engine. Also the 2 intake hoses to and from the intercooler need to come off too.

 

I just did my cambelt and cam seals a month ago but the usual i cant remember what i did yesterday never mind a month ago.

 

HTH John Crisp (woohoo another scots 300)

John sorry to correct you but I`m sure you meant the top right hand cover as you look at the engine from the front, as the inlet pipes need to come off before the left hand cover is removed.

 

Jeff TT

Jeff

 

Yep it was the right hand cover as u look at the car but on the car its the left hand side of the engine.

 

Cheers John Crisp

thanks lads!

 

Nobody else heard the faint chitty noise then?

Willie

 

When u say chitty noise, is it like a ticking noise, does it speed up with the engine being revved faster, anything else??

 

Cheers John Crisp

John

 

It sounds like it comes from the belt once per revolution of the cam belt so its much slower than an engine rpm. Its sounds like a sticky patch on the belt going over one of the cam wheels. Varies with engine speed but you only hear it when ticking over really slow and quiet. Otherwise she runs great.

 

In the service records Nissan must have cocked up the cam belt fit because a knocking noise was heard within 1000 miles of fitting it. Another belt was then fitted FOC by Nissan. It made me think they frayed it or something the first time and the frayed bit caused the knocking then.

 

I'm maybe worried about nothing.

Can't help really, but just to let you know that when I replaced the cam belt (bought from Nissan) it didn't come with a sticker on it. That was on the plastic bag it was in. I'd check it out if I was you...

 

 

good luck

 

Jack

you wanna worry when it makes a chitty chitty bang bang noise !;) :D

Willie

 

Can u not run the car with the top left cover off to see if u can see anything when the engine is running.

 

Cheers John Crisp

Thanks John

 

Thats what I will do next.