Help putting tension on the Vbelt - The 1947 - Present Chevrolet & GMC Truck Message Board Network

thun · 08-21-2011, 03:27 PM

Hi I am trying to put my vbelt back on and I have few questions. How much play should be in the belt? Do I just tug on the alternator until it's tight and then torque it down?

BMERDOC · 08-21-2011, 03:30 PM

Yeah, make sure it has at least a half inch of deflection in either direction. Don't make it guitar string tight. Tighten it down till you can push on it with a finger and have it move about one half inch. Not too loose, not too tight. Then lock it down.

thun · 08-21-2011, 04:24 PM

Ty. Just curious how to remove the fan so I can actually remove the entire belt?

**old Rusty C10** · 08-21-2011, 04:26 PM

i generally tighten them to about 1/4 inch past when the belt slack ends when you appy pressure to the belt..

BMERDOC · 08-21-2011, 04:38 PM

If you wanna take the fan off you should have 3 or 4 nuts between the pump pulley and fan to remove it. They should be a 1/2" nut.

grs · 08-21-2011, 06:15 PM

Quote:

Originally Posted by thun

Ty. Just curious how to remove the fan so I can actually remove the entire belt?

You don't have to remove the fan to get the belt off. Slip the belt over one of the fan blades then turn the fan, and then slip the belt over another blade, and turn the fan again. Keep it up til the belt is off.

WarBeard · 08-21-2011, 08:41 PM

Quote:

Originally Posted by grs

You don't have to remove the fan to get the belt off. Slip the belt over one of the fan blades then turn the fan, and then slip the belt over another blade, and turn the fan again. Keep it up til the belt is off.

Yup no need to remove the fan. Or if you know the new belt will be the correct fit I just cut the old ones off saves a lil bit of time.

tucsonjwt · 08-21-2011, 08:51 PM

I'm not sure why you need to remove the fan in order to remove the belt - you can thread the belt around the blades of the fan and slip it off - I must be missing something here.
There is a rule of thumb on belt deflection based on the length of the belt, but I just tighten until the belts don't squeal because I have an air pump, which means that the belt has to be very tight in order to not squeal.
The fan is attached to the water pump pulley with 4 short threaded studs and nuts (usually with lock washers). If you do remove the fan you might want to replace those studs and nuts/washers since they tend to seize up and not want to turn after years of being in place.

08-21-2011, 03:27 PM	#1
thun Registered User Join Date: Apr 2011 Location: Las Vegas, NV Posts: 32	Help putting tension on the Vbelt Hi I am trying to put my vbelt back on and I have few questions. How much play should be in the belt? Do I just tug on the alternator until it's tight and then torque it down? __________________ 86 C20 2wd with 454 and Turbo 400

08-21-2011, 03:30 PM	#2
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: Help putting tension on the Vbelt Yeah, make sure it has at least a half inch of deflection in either direction. Don't make it guitar string tight. Tighten it down till you can push on it with a finger and have it move about one half inch. Not too loose, not too tight. Then lock it down. __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

08-21-2011, 04:24 PM	#3
thun Registered User Join Date: Apr 2011 Location: Las Vegas, NV Posts: 32	Re: Help putting tension on the Vbelt Ty. Just curious how to remove the fan so I can actually remove the entire belt? __________________ 86 C20 2wd with 454 and Turbo 400

08-21-2011, 04:26 PM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	Re: Help putting tension on the Vbelt i generally tighten them to about 1/4 inch past when the belt slack ends when you appy pressure to the belt.. __________________ 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!!

08-21-2011, 04:38 PM	#5
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: Help putting tension on the Vbelt If you wanna take the fan off you should have 3 or 4 nuts between the pump pulley and fan to remove it. They should be a 1/2" nut. __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

08-21-2011, 08:51 PM	#8
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Re: Help putting tension on the Vbelt I'm not sure why you need to remove the fan in order to remove the belt - you can thread the belt around the blades of the fan and slip it off - I must be missing something here. There is a rule of thumb on belt deflection based on the length of the belt, but I just tighten until the belts don't squeal because I have an air pump, which means that the belt has to be very tight in order to not squeal. The fan is attached to the water pump pulley with 4 short threaded studs and nuts (usually with lock washers). If you do remove the fan you might want to replace those studs and nuts/washers since they tend to seize up and not want to turn after years of being in place.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.