I have changed my oil at regular intervals since i had the car with Synthetic... But for the last few weeks my engine has been ticking very loudly and seems to be getting louder. It ticks at the speed the engine is going. Someone suggested that it may have lost compression??? Has anyone else had this problem and if so how much did Nissan charge?? Someone also suggested a tuneup but i dont see how a routine tuneup would take care of this problem.

 

BTW Its a 2003 with about 80k miles on it. Thanks.

 

And the tapping sound is more noisy when the motor is warm?

a. Improper valve clearance
b. Motor oil is low
c. Low oil pressure
d. Valve lifters are worn
e. Connecting rods are bent or worn

 

I would say its just as loud warm or cold.... Does this help define what the problem is??

BTW.. That stuff you named sounds hellva expensive...

 

lifters are out of adjustment most likely or the oil passages to them are clogged.

 

Hmm this definitely sounds plausable. About on average how much is something like this at the dealer??? Thanks.

 

what changing the lifter? ALOT!!!!!! id try to run cleaner through your system first and see where that got you.

 

I put in some oil cleaner about a 3 weeks ago during oild change and since then it has gotten louder.. So not sure if thats going to help. Maybe I will try and change again and add something.. What do you recommend??

 

i would add some of this, it worked on my 300zx with the lifter tick and i dont see why it wont work with the 350z http://www.lucasoil.com/products/dis...tid=2&loc=show

 

yea a bad rod bearing would be a bummer... It would be cheaper to get a used motor if thats the case...Do you run your car hard?

 

i would say its probably a valve train issue. i need some more information to work with though, is your oil pressure normal? what are the specs after the engine is warmed up and what weight of oil are you using? synthetic? is the ticking audible within the passenger compartment, and if so, at what rpms?