idle noise question

Ok my 240sx drives great, but when the rpm goes under 900, it makes a strange noise. It sounds like a scrapping/clicking. It goes away with any amout of gas which makes me beleive that it is outside the block (not certain). I think it is the injectors but I am not sure. If anyone has ever had a similar problem could use some help! Are there any known problems with 240s that relates to this? :screwy: :disappoin

probably your timing chain. Listen very closely to the front of your valve cover.

Your right that is what it was. I talked to a friend who is a mechanic and he said the same thing.

I was sweating it . thought i was going to spend some major dough. phew!!!

ummm... timing chain is a pain in the ass, i dont know from experience how hard and expensive it is, but from the complaints of people on this forum, its a bitch to do.

yea timing chains are too much i spent 900 for it

Let me give you a brief idea, my brothers altima had warped heads, so he was paying me to fix them, after opening the valve covers, viewing the job and inquiring about some parts from nissan, lets just cut the long story short, the car is in N.carolina, sold to someone. I removed the thermostat and put in a better water pump to prevent quick overheating while running at the auction. Good tale tale sign of warped heads is overheating and bubling in radiator.