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fan belt tension

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mickeytwonames
Posts: 62
Joined: Fri Aug 31, 2018 8:46 pm
Location: pershore worcestershire

fan belt tension

Post by mickeytwonames » Wed Jul 03, 2019 6:39 pm

How much play is recommended on the Fan belt - is 1/2inch too tight?
Daimler Consort 2.5 ltr
Many thanks

Big Col
Posts: 407
Joined: Tue Feb 16, 2016 12:45 pm
Location: Leeds

Re: fan belt tension

Post by Big Col » Wed Jul 03, 2019 9:24 pm

Older cars don’t like too much tension. Unless the water pump etc have been adapted to modern bearings, then I would only tension them to a half inch and no more. That said if you do have to tension them more to get drive then the actual pulleys may be worn.
Colin,
I may be slow but I’m rough as well !

mickeytwonames
Posts: 62
Joined: Fri Aug 31, 2018 8:46 pm
Location: pershore worcestershire

Re: fan belt tension

Post by mickeytwonames » Sun Jul 07, 2019 10:49 am

Before I tighten it up - I thought I'd order a spare - just in case3 - found out I had too bigger width belt on so am now about to install the correct one.

mickeytwonames
Posts: 62
Joined: Fri Aug 31, 2018 8:46 pm
Location: pershore worcestershire

Re: fan belt tension

Post by mickeytwonames » Mon Jul 15, 2019 1:01 pm

I was sent a fanbelt form a classic car specialist who sent me a Power Transmission Plu B-41 - while it fits even when I have taken all the slack using the Dynamo adjuster it still feels slack - though it works. Does anyone have an opinion please?
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NickDeAth
Posts: 343
Joined: Mon Feb 15, 2016 8:41 pm
Location: South Essex

Re: fan belt tension

Post by NickDeAth » Mon Jul 15, 2019 8:16 pm

How much movement have you got on the longest run of the belt? If it's more than 1/2 to 3/4 inch that' s too much and the belt is too long.

Nick
"Nick - do you think you will ever put that old car back together again?"

mickeytwonames
Posts: 62
Joined: Fri Aug 31, 2018 8:46 pm
Location: pershore worcestershire

Re: fan belt tension

Post by mickeytwonames » Mon Jul 15, 2019 10:16 pm

Look like I've been sold a pup

NickDeAth
Posts: 343
Joined: Mon Feb 15, 2016 8:41 pm
Location: South Essex

Re: fan belt tension

Post by NickDeAth » Tue Jul 16, 2019 9:00 pm

I think I have a belt somewhere with the original number on it, I'll try and find it and post the number on here. I seem to remember they are quite a wide section.

Nick
"Nick - do you think you will ever put that old car back together again?"

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