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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: the_legend_1981 on May 25, 2011, 07:37:39 pm

Title: tensioner pulley
Post by: the_legend_1981 on May 25, 2011, 07:37:39 pm

I just changed my tensioner pulley about a week ago and used one off of a backup engine i have that's been sitting for about a year...it just started making noise again. not as bad but i can hear it. Should I buy a new one or is something else wrong? thanks

Title: Re: tensioner pulley
Post by: the_legend_1981 on May 25, 2011, 07:37:55 pm

the pulley looks new

Title: Re: tensioner pulley
Post by: VileZambonie on May 25, 2011, 07:40:15 pm

How's the pulley alignment? Power steering pump replaced recently?

Title: Re: tensioner pulley
Post by: the_legend_1981 on May 25, 2011, 09:08:26 pm

the alignment looks good. no i havent changed the power steering pump.

Title: Re: tensioner pulley
Post by: the_legend_1981 on May 25, 2011, 09:09:40 pm

should i change the whole assembly?

Title: Re: tensioner pulley
Post by: the_legend_1981 on May 25, 2011, 09:11:15 pm

i did drain and fill the pump about a month ago...

Title: Re: tensioner pulley
Post by: Lt.Del on May 25, 2011, 10:13:22 pm

didn't you say earlier that the noise didn't seem to be coming from the p.s. pump, but the tensioner pulley?  I hate to keep throwing things out there, but, the water pump bearings could also be on the verge---does the fan, which is bolted to the pump, have any play when you push and pull the blades front and back?
You mentioned last week the p.s. pump noise didn't change when turning the wheel. I would think the whine would get higher or lower as you turn the wheel if it was the p.s. pump.

Title: Re: tensioner pulley
Post by: the_legend_1981 on May 26, 2011, 08:51:33 pm

I changed the tensioner and there's no play in the fan. It doesnt do it at an idle now. while driving i hear it in 1st and 2nd. The power steering makes a slight noise while turning at an idle in park, but nothing out of the ordinary...

Title: Re: tensioner pulley
Post by: VileZambonie on May 27, 2011, 03:34:07 pm

You have yet to describe the noise you are hearing.

Title: Re: tensioner pulley
Post by: the_legend_1981 on September 20, 2011, 05:32:04 pm

Sounds like a power steering whine. but its not that.

Title: Re: tensioner pulley
Post by: Irish_Alley on September 20, 2011, 05:50:59 pm

kind of leaning with sgt towards a bearing. get a mechanics stethoscope screwdriver and listen to the alt water pump and a/c if you have it

Title: Re: tensioner pulley
Post by: the_legend_1981 on September 20, 2011, 05:55:09 pm

yeah i'm gonna have to get a hand because i can only really hear it at about 2000rpm.

Title: Re: tensioner pulley
Post by: the_legend_1981 on September 20, 2011, 06:00:27 pm

some one told me to take the belt off and spin all of the pulleys and see if any make noise. its hard to tell with the fan noise. would this work?

Title: Re: tensioner pulley
Post by: Irish_Alley on September 20, 2011, 06:38:51 pm

take the fan off? you wont over heat in a couple minutes, if your cold to start. i doubt unless the bearing or pulley is making then noise you can spin it that fast by hand

Title: Re: tensioner pulley
Post by: 9511234 on September 20, 2011, 08:23:56 pm

If it's making a noise at that RPM it should sound different or even feel different when spun by hand.

The broomstick or mechanic's stethoscope would tell you real fast, too - instead of hearing a nice smooth whirring you would hear grinding - which at speed you could probably hear in the truck.

I've replaced a couple alternator's because the bearing went bad in them before anything else- yeah you can replace the bearing by getting a kit, but I just replace them at that point.

Title: Re: tensioner pulley
Post by: the_legend_1981 on September 21, 2011, 11:14:23 am

the idler pulley is hard to turn. Should it be?

Title: Re: tensioner pulley
Post by: Irish_Alley on September 21, 2011, 03:26:12 pm

without the belt nothing should be hard to turn but the crank