High pitch noise when I start truck. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

84Stepper · 10-08-2003, 11:15 PM

I put my new alternator in tonight and when I go to start the truck it makes a loud whinning noise that sounds like it is comming from the starter. Whats wrong? Any help would be great! Thanks, Jon

**old Rusty C10** · 10-09-2003, 11:01 AM

gonna need more info to help ya out here
Did this noise start when ya put in the alternator? are ya sure its from the starter? how long does this noise last? does it increase/decrease when ya rev the motor?
If ya just put on the alternator and it started id check to see if the belt is loose or slipping. If its slipping you may have to scuff the pulleys on it with some sandpaper and re adjust the belt to get the slippage to stop. this could also be to junk getting onto the air pump pulley or belt when removing the alternator
if you get a whining noise from the starter it usually stops when the starter stops spinning, and it usually means the demise of the starter

LOHRTBT · 10-09-2003, 11:09 AM

If you just put on an alt...and your squealing...more than likely you have got the belt way too tight!!... Make sure it has some play...but not too much.

LOHRTBT · 10-09-2003, 11:10 AM

Oh...and if that doesent fix it..you might have gotten a bad alternator.

84Stepper · 10-09-2003, 01:33 PM

Thanks for the help, I'll make sure my belt is not too tight, I used a crowbar to hold it while I tighted it. Ya know how when your truck is running and you accidently turn the key again and it screeches. It sounds like that when I go to start it. I'm I grinding any teeth? Can I still drive it till I get it fixed?

79BIG10 · 10-09-2003, 06:24 PM

Is it just when you start it or all the time? If it's all the time then you are looking at the belt or alternator. If it's just when you try to start it then it could be a starter not aligning up right with the flexplate.

84Stepper · 10-09-2003, 11:06 PM

It only does it when I start it. The belt is fine. The starter is only about 1 year old, but it is right next to the header. Mybe it gets to hot. I've seen other threads about shims, but I don't know how to do it or where they go. Is it hard to do? I put the starter in myself. Thanks.

10-08-2003, 11:15 PM	#1
84Stepper Registered User Join Date: Feb 2003 Location: Edmond, Oklahoma Posts: 425	High pitch noise when I start truck. I put my new alternator in tonight and when I go to start the truck it makes a loud whinning noise that sounds like it is comming from the starter. Whats wrong? Any help would be great! Thanks, Jon __________________ 84 Chevy Stepside, 350, TH350, 268h Comp cam, Hooker headers, MSD Pro Billet, Edelbrock Performer manifold and 1604 carb, 40 Series Flowmasters dumped, and Western Chassis 3/5 drop w/ c notch. New 3:73 Eaton Posi

10-09-2003, 11:01 AM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	gonna need more info to help ya out here Did this noise start when ya put in the alternator? are ya sure its from the starter? how long does this noise last? does it increase/decrease when ya rev the motor? If ya just put on the alternator and it started id check to see if the belt is loose or slipping. If its slipping you may have to scuff the pulleys on it with some sandpaper and re adjust the belt to get the slippage to stop. this could also be to junk getting onto the air pump pulley or belt when removing the alternator if you get a whining noise from the starter it usually stops when the starter stops spinning, and it usually means the demise of the starter __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

10-09-2003, 11:09 AM	#3
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	If you just put on an alt...and your squealing...more than likely you have got the belt way too tight!!... Make sure it has some play...but not too much. __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

10-09-2003, 11:10 AM	#4
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	Oh...and if that doesent fix it..you might have gotten a bad alternator. __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

10-09-2003, 01:33 PM	#5
84Stepper Registered User Join Date: Feb 2003 Location: Edmond, Oklahoma Posts: 425	Thanks for the help, I'll make sure my belt is not too tight, I used a crowbar to hold it while I tighted it. Ya know how when your truck is running and you accidently turn the key again and it screeches. It sounds like that when I go to start it. I'm I grinding any teeth? Can I still drive it till I get it fixed? __________________ 84 Chevy Stepside, 350, TH350, 268h Comp cam, Hooker headers, MSD Pro Billet, Edelbrock Performer manifold and 1604 carb, 40 Series Flowmasters dumped, and Western Chassis 3/5 drop w/ c notch. New 3:73 Eaton Posi

10-09-2003, 06:24 PM	#6
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Is it just when you start it or all the time? If it's all the time then you are looking at the belt or alternator. If it's just when you try to start it then it could be a starter not aligning up right with the flexplate. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

10-09-2003, 11:06 PM	#7
84Stepper Registered User Join Date: Feb 2003 Location: Edmond, Oklahoma Posts: 425	It only does it when I start it. The belt is fine. The starter is only about 1 year old, but it is right next to the header. Mybe it gets to hot. I've seen other threads about shims, but I don't know how to do it or where they go. Is it hard to do? I put the starter in myself. Thanks. __________________ 84 Chevy Stepside, 350, TH350, 268h Comp cam, Hooker headers, MSD Pro Billet, Edelbrock Performer manifold and 1604 carb, 40 Series Flowmasters dumped, and Western Chassis 3/5 drop w/ c notch. New 3:73 Eaton Posi



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