Cabrio 205 Pinto Engine Squeaky Fan Belt.

[marlinmick]

Here's an odd/interesting one for you that I need some help/advice on.

My 205 Engine'd Cabrio starts and runs OK but whenever I put a load on the alternator (turn the lights on) the toothed belt protests like a wailing banshee, it then settles down, then when I put an additional load on it (heater fan) off goes the banshee again and so on with each additional load I put on the alternator, even the indicators cause phased belt protestations.

The voltage remains steady at about 13.8 volts, I have adjusted the belt assuming that its slipping but then the belt makes a noise like a buzz saw. What's going on?

The engines is fitted with a belt driven viscous cooling fan.

Is my belt knackered/does it have to be a toothed belt, is the alternator under-powered and is over working?
Could all of the pully's be knackered?
It happens at all engine temperatures.

Help/advice/suggestions required. Please.

Regards to all

Mick.

[chris_cussen]

Re: Cabrio 205 Pinto Engine Squeaky Fan Belt.

Hi,
Are you sure the belt has teeth, or does it consist of a set of grooves, which I think is usual for this engine/alternator combination.
I think the noise is cause by the belt slipping slightly as you increase the load as it takes more power to spin the alternator.
I would check the belt tension and look to see if it is showing signs or wear. They are not very expensive to replace.
Chris

[dave_clutterbuck]

Re: Cabrio 205 Pinto Engine Squeaky Fan Belt.

Had the same issues with mine. ended up replacing the alternator and grooved belt.
Also did try belt dressing spray as a temporary measure
Dave

[dogoncrazy]

Re: Cabrio 205 Pinto Engine Squeaky Fan Belt.

Mick
I would just change the belt at first as it's less costly and see what result is.

[bryannewell]

Re: Cabrio 205 Pinto Engine Squeaky Fan Belt.

Pretty sure a Pinto 205 does not have a toothed belt? (I restored a Roadster a while ago and put in a Pinto with 205 block) in fact I have a belt left over from that and it is not grooved!(before anyone asks,it is not available as I have just used used it together with a Sowing Machine motor to make a Drum Sander, Another lockdown project!)
Belt prob just needs a tighten but may benefit from a new one

[scott h]

Re: Cabrio 205 Pinto Engine Squeaky Fan Belt.

My guess is that it is a cogged v belt. These have more or less superseded plain v belts due to better efficiency and longer life. A cogged v belt runs on the same v pulley as a plain belt.