can anyone identify this noise?

[bear]

my 83 K5 has a 305 V8.........recently I have noticed a very strange high pitched whining noise when the engine is warm. Anybody got any ideas on what this might be? any help appreciated......this is getting very annoying! /forums/images/icons/tongue.gif

 

[bouncytruck]

clogged up emissions?

 

[SkulzNBonz]

Maybe your power steering pump.

John

 

[uglychevyZZ4]

after being a master tech for many years, im going to make a few common guesses, aside from that, your on your own /forums/images/icons/laugh.gif

#1 belt--they get looser when warm.

#2 alt bearing

#3 p/s pump

#4 air pump or bearing

#5 do you have any idler pully's? a/c clutch fryed? clutch fan internals


you need to poke and prod around, try the old **screwdriver to ear ( the big end for god sakes /forums/images/icons/laugh.gif ) and this may help. if you have to, get a can of something NON_GREASY like carb, or brake cleen, and spray it on one part to the next ( like a bearing surface etc.. ) , one at a time to see if noise go away.also a non greasy spray will help for only a minute , and not stay greasy to slip on belts etc... /forums/images/icons/wink.gif

 

[Blazer1970]

I would vote for the smog pump. Pull the belts off and turn stuff by hand (alt., smog pump, ps pump), and see if you can tell what is squeaking.

 

[bear]

thanx for the ideas.....I'll check some of that stuff out this weekend...

 

[chevyracing]

If it has A/C check for a pressure leak around the high pressure switch.

John