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How much will a v belt stretch? #4549652
10/20/17 08:47 PM
10/20/17 08:47 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
In have an old Exmark 21" mower where the self propel belt keeps coming off. I'm trying to decide if its the belt that's worn out and stretched or the grooved pulleys worn out.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How much will a v belt stretch? [Re: motor_oil_madman] #4549658
10/20/17 08:49 PM
10/20/17 08:49 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
The belt is completely cracked and doesn't even look like it's a v belt anymore. Lol I have the pulleys to replace, but I'm afraid it will be too much trouble to replace them.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How much will a v belt stretch? [Re: motor_oil_madman] #4549661
10/20/17 08:52 PM
10/20/17 08:52 PM
Joined: Jun 2003
Posts: 33,071
ME
eljefino Online content
eljefino  Online Content
Joined: Jun 2003
Posts: 33,071
ME
Quite possible it's the pullely where they're down there getting blasted by sand. A new belt should fit only on the sides, it should not be "bottoming out".

Re: How much will a v belt stretch? [Re: motor_oil_madman] #4549672
10/20/17 09:04 PM
10/20/17 09:04 PM
Joined: Aug 2008
Posts: 18,272
Ontario, Canada
StevieC Online content
StevieC  Online Content
Joined: Aug 2008
Posts: 18,272
Ontario, Canada
My mom's Kia Spectra had a "V" belt for the alternator and it kept squealing and then one winter it popped off all together.
Turned out the two pulleys were off alignment slightly causing it to rub. Replaced the Alternator Pulley and all we well.

Check for perfectly straight alignment with a sharp straight edge against the side sides of the pulleys.


'18 Highlander - AMSOIL SS 0w20 / ATF / Severe Gear
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF (R.I.P)
Re: How much will a v belt stretch? [Re: StevieC] #4549761
10/20/17 11:22 PM
10/20/17 11:22 PM
Joined: Nov 2011
Posts: 3,948
Lima, Ohio, USA
earlyre Offline
earlyre  Offline
Joined: Nov 2011
Posts: 3,948
Lima, Ohio, USA
Originally Posted By: StevieC
My mom's Kia Spectra had a "V" belt for the alternator and it kept squealing and then one winter it popped off all together.
Turned out the two pulleys were off alignment slightly causing it to rub. Replaced the Alternator Pulley and all we well.

Check for perfectly straight alignment with a sharp straight edge against the side sides of the pulleys.


sounds like my old sonata,at one point the generator belt was down to what looked like a frayed hairy rubberband.

one shop replaced both belts 3 times in 6mos, cuz they kept squealing. they finally gave up on the parts store belts, and ordered the OE part from the dealer. it never squealed again.


Mine:
09 Mercury Sable : 6qts AutoQuest(Meijer/Warren) 0w20, WIX 51516
Mine to Maintain:
03 Pontiac Vibe : 4.5qts VWB 5w30,WIX 51394
Re: How much will a v belt stretch? [Re: motor_oil_madman] #4549972
10/21/17 08:56 AM
10/21/17 08:56 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Last time I checked the pully on the crank is held on by a set screw. Is it pressed on also?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How much will a v belt stretch? [Re: motor_oil_madman] #4549988
10/21/17 09:16 AM
10/21/17 09:16 AM
Joined: Aug 2003
Posts: 10,774
Buffalo, NY
JTK Offline
JTK  Offline
Joined: Aug 2003
Posts: 10,774
Buffalo, NY
Originally Posted By: motor_oil_madman
Last time I checked the pully on the crank is held on by a set screw. Is it pressed on also?


If not, it will likely act as if it's pressed on now. Depending on the age of the mower and amount of corrosion, they can be a real pain to remove short of cutting them off with a grinder.


2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)
Re: How much will a v belt stretch? [Re: motor_oil_madman] #4550022
10/21/17 09:52 AM
10/21/17 09:52 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Well then I'll throw a new belt on and sell it. Just wondering how difficult it would be since I already have the parts I bought a while back.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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