1.3 Fanbelt

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1.3 Fanbelt

Post by leopard_pagan on Sun Jun 23, 2013 9:30 am

piece of piss to swap so not the issue...

The Fan belt snapped on its way to a MOT in Febuary, i got the MPV a month later; it drove from Wales to Suffolk with out a squeek, the following 1st week the fan belt started to slip & i tightened it.
The last 2 weeks when the weather has gotten warmer(?) i have been hearing the starts to slippage... & yesterday a definite slip. 

I am going to replace the belt as i have no idea what the chap fitted it with, but does kinda worry me that it slipped twice in 6 months. do the pullys wear out? or just be a shitty belt they fitted to get thru MOT. the belt looked OK when i tightened it last time.

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Re: 1.3 Fanbelt

Post by Guest on Sun Jun 23, 2013 9:42 am

They just stretch LP. As you will know from doing it yourself they aren't the easiest of belts to adjust and tension as there is no easy place to get leverage on --- though I am sure HJ or someone will have a cunning plan on how to tension it easily--- I hope!! 
Coz I could benefit from their ideas too.cheers

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Re: 1.3 Fanbelt

Post by HighlyJetted on Sun Jun 23, 2013 10:18 am

Excessive belt failure is a symptom of:-

Damaged pulleys - check for dents or rubber build up
Pulley misalignment
Fluid contamination - check the crank pulley for oil leakage
Over tighted belt installation
Under tightened belt installation
Excessive load caused by tight/failing alternator or water pump

I tension mine by putting a bar underneath it, to the side near the thermostat housing. And I tend to go through the belt groves of the pulley with a wire brush and wire wool before fitting new belts.

And my golden rule for belt tensioning is:- If you can twist the belt on its longest length by 180 degrees it is about right. If you can spin it more then its loose, if you can't spin/twist it 180 degrees its too tight. Another method is you should be able to get about half inch deflection on the longest span.
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Re: 1.3 Fanbelt

Post by Guest on Sun Jun 23, 2013 11:45 am

Thanks HJ. :-)

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Re: 1.3 Fanbelt

Post by leopard_pagan on Sun Jun 23, 2013 1:03 pm

ta... when it stops raining i'll have a gander.. & still getting a new one.
any tips on fanbelts? which are better made etc?
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Re: 1.3 Fanbelt

Post by leopard_pagan on Sun Jun 23, 2013 2:49 pm

I swear that i brushed all this black stuff off the seat/area when i got it....
it feels rubbery... & its in the vicinity of the fanbelt...

so i am now pondering if the pulleys are off.
Damaged pulleys - check for dents or rubber build up:--> see pic below, but i couldnt see any damage, couldnt feel any sharp bits chunks missing when i felt around them.
Pulley misalignment:--> possibly...
Fluid contamination - check the crank pulley for oil leakage:--> found none
Over tighted belt installation:--> i can turn the belt 180.. just.
Under tightened belt installation:---> maybe a shity belt, got a new one picking up tomorrow.
Excessive load caused by tight/failing alternator or water pump:--> battery hasnt faded but i can test voltage... no signs of water circulation.. ?


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Re: 1.3 Fanbelt

Post by HighlyJetted on Sun Jun 23, 2013 3:09 pm

spin the pump and the alternator, see if they turn easy.

and as you spin them watch they don't "wonk" about - as in bent.

that picture does look like belt dust.

If you have all that waste rubber dust, and you can still only just make a 180 twist, i'd say it was vey bloody tight originally.

Check for play in the water pump shaft and alternator as over tightening belts shags bearings and bushes.

The belts V shape should fit the pulleys nice, if you over tighten them they wear down and no longer grip properly.
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Re: 1.3 Fanbelt

Post by rich the mechanic on Sun Jun 23, 2013 5:02 pm

HighlyJetted wrote: Another method is you should be able to get about half inch deflection on the longest span.

I thought you are metric that's 12.7mm:scratch:
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Re: 1.3 Fanbelt

Post by HighlyJetted on Sun Jun 23, 2013 10:02 pm

Seeing as the belt deflection isn't really measurable I thought I'd use half inch as its not a real measurement.
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Re: 1.3 Fanbelt

Post by rich the mechanic on Sun Jun 23, 2013 10:06 pm

Remind me what size are the wheels????
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Re: 1.3 Fanbelt

Post by Guest on Sun Jun 23, 2013 11:00 pm

Good point Rich. Since metrication' I have always thought it wierd that the diameter of a wheel was measured in inches and the width in metrics. Very odd way of going on.

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Re: 1.3 Fanbelt

Post by HighlyJetted on Sun Jun 23, 2013 11:22 pm

A funny old mishmash hey! J in inches, PCD in MM, Bore in MM, offset in MM.

Just goes to show the accurate suff is in Mill, while the rough stuff is all inchy nonsense.

Wheelwright work is a pretty rough crude science, like brick laying and tiling its not real engineering. Wink

Chuck some weights on it and hit it with a hammer, no one will notice a quarter inch here or there.
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Re: 1.3 Fanbelt

Post by Guest on Sun Jun 23, 2013 11:36 pm

I know I am pretty ancient compared to most of you nippers but I work and think in metric because as you said it's more accurate but I can think in both while I am working unlike most of my generation who can only think in inches and pounds and gallons.
Much prefer Metric and automatically convert in weight and liquid in 2.2 and 4.55.

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Re: 1.3 Fanbelt

Post by Logi on Sun Jun 23, 2013 11:40 pm

Have a look at bridges, all are marked in imperial. Some have metric as well but none metric alone. Its one of the last old school measuring left.
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Re: 1.3 Fanbelt

Post by Guest on Sun Jun 23, 2013 11:42 pm

Yep you're right Logi.

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Re: 1.3 Fanbelt

Post by leopard_pagan on Mon Jun 24, 2013 12:41 pm

Why do MEN bicker on measurements? Just ask a woman for the truth Wink

Back to topic:::- 
What's the average life span of a fan belt?
I do 500 miles a week: 2,000 a month & had van just over 2 months= 4,000 -5,000 miles
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Re: 1.3 Fanbelt

Post by HighlyJetted on Mon Jun 24, 2013 12:50 pm

30k sometimes a fair bit more.
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Re: 1.3 Fanbelt

Post by HighlyJetted on Mon Jun 24, 2013 12:51 pm

Either way you shouldn't get rubber swarf everywhere.
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Re: 1.3 Fanbelt

Post by rich the mechanic on Mon Jun 24, 2013 10:13 pm

leopard_pagan wrote:
What's the average life span of a fan belt?

If your going to be picky then the average life of a fan belt on a Hijet is a big fat zero as it hasn't got one Exclamation however an auxillary belt if kept correctly tensioned and used regularly will last indefinately.

and HJ if you think a quater here or there is ok I will never trust a wheel you build I work to 1/16" max, normal work is to 1/64" or less.
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Re: 1.3 Fanbelt

Post by Guest on Mon Jun 24, 2013 10:57 pm

Steady on Girls.Put the claws away. Listen to Grandad.drunken

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Re: 1.3 Fanbelt

Post by HighlyJetted on Mon Jun 24, 2013 11:15 pm

Yeah, you sure don't want me to do you a rim job!

In all honesty I don't have a frickin clue how to trim a spoked wheel, leave it to the experts!

And quite right it ain't no fan belt, but old names stick around.
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Re: 1.3 Fanbelt

Post by rich the mechanic on Tue Jun 25, 2013 9:25 pm

Very Happy Very Happy Very Happy
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Re: 1.3 Fanbelt

Post by leopard_pagan on Wed Jun 26, 2013 6:50 am

Fan belt
CDI unit
Altinitor
Rearset
Triple tree

Wink so long as ya know what I meant. 
All sorted for now. Gonna keep an eye on the rubber dust under seat.
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Re: 1.3 Fanbelt

Post by rich the mechanic on Wed Jun 26, 2013 9:11 pm

leopard_pagan wrote:
Triple tree

You've been around septics to long Laughing Laughing
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Re: 1.3 Fanbelt

Post by PFM on Wed Jun 26, 2013 9:55 pm

Tanks, Rich?

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Re: 1.3 Fanbelt

Post by rich the mechanic on Wed Jun 26, 2013 9:59 pm

PFM wrote:Tanks, Rich?

Yeah thats em I suppose I spent to much time with eastenders growing up in east london.
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Re: 1.3 Fanbelt

Post by leopard_pagan on Wed Jan 22, 2014 5:29 pm

The Fan Belts Squeaking again.
aprox 7,000 miles old since i fitted it.. good news... there is no rubber dust like there was the 1st time..
lifespan of my belts... 6 months ish!

Any brand of belt that might last longer anyone can recommend?
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Re: 1.3 Fanbelt

Post by rich the mechanic on Wed Jan 22, 2014 9:35 pm

Just adjust it all belts bed in and stretch with use.
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Re: 1.3 Fanbelt

Post by leopard_pagan on Thu Jan 23, 2014 11:23 am

I did, this morning at 6am in the dark & rain because it decided to screech from the get go. Ah well now my Friday afternoon has an extra 30mins Smile
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Re: 1.3 Fanbelt

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