Hey guys, this is actually my first post here and just liked to give a little basic info first. I currently own a '78 280z and am located in SoCal. I recently just got the car back from Mike's Z Shop in Whittier (they do great work by the way and very friendly) after completing a transmission overhaul.

This problem started occurring last night, a couple days after i got the car back so i don't think it has anything to do with that issue. So usually when i start my Z up I give it a little gas to ease the start up (also note that I am running triple webers) but last night as I did the same thing I got a loud chirping noise in return. I drove the car home fine and noticed the sound only occurs towards the low-mid rpm when I give it gas in neutral.

If anyone have any insights as to what might be going on here, I'd greatly appreciate it!

It's nice to meet you all and have a wonderful New Years Eve!

-Matt

Hey Matt. Probably a loose fan belt.

Bearing in belt tensioner pulleys.

Edited December 31, 201311 yr by black gold man

Thanks for the input guys! I'll definitely check those two things out. As far as how urgent this issue is, am I in any immediate danger as far as driving it to my Z guy?

No danger. All you risk is a bit of wear on the belts, but a trip across town is no biggie. FAIW, it's a very easy job to tighten the belt(s) yourself. You can also try spraying the belts with a bit of belt dressing.

My guess it's the alternator bearing(s) . Hand check that the pulley turns smoothly without the belt installed.

Just my brand new 2014 2 cents worth - even if Canada don't make 'em anymore !

thanks for the input guys! it turned out to be a bad harmonic balancer which is a little more serious than just the belt issue but i made it to the shop just fine!

Wow... spooky! I had just mentioned a possible harmonic balancer issue to someone in another thread! I'm glad everything came out OK. Hope your wallet isn't too much lighter.