Ive heard about various applications of things and stuff to appease
an angry fan belt.
Any advice to quieten a spasmodiacally squeaky fan belt?
thanks
stratton–
dawnl
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Belt dressings never seem to work for me…sometimes they make things
worse.
A new belt and cleaned pulley/pulleys usually does the trick.
Sometimes belts develop a glaze. A good cleaning might take it off.
Cheers
Doug Dwyer
Longview Washington USA
1995 XJR
Ive heard about various applications of things and stuff to appease
an angry fan belt.Any advice to quieten a spasmodiacally squeaky fan belt?
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !From: “dawnl” dawnlamos@yahoo.com.au
In reply to a message from Doug Dwyer sent Fri 26 Jun 2009:
spray silicon lube for ‘‘airsoftguns’’ has worked ‘‘magic’’ for all my
V12 underhood belts and hoses and rubber…
Lead–
mexico
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In reply to a message from dawnl sent Fri 26 Jun 2009:
In my experience belt dressing works fine usually as soon as you
spray it but the squeak can come back worse later -a nd sometims
not very long afterwards.
My wife’s Discovery had a horrendous screeching that I was 110%
convinced was the bearing in the spring tensioner on its way out
(the bearing had developed play). Yet despite this incredible
metallic noise, the second I squirted dressing on the belt - taking
care to stay away from and pivot bearing - it instantly went
silent. Only lasted a few minutes each time though so there was no
alternative to doing the bearing anyway.
The slight bearing noise disappeared when I replaced the bearing
with a new one, but the poly-vee belt carried on screeching as
badly as ever. As Doug says, a new belt and cleaning the pulleys as
much as possible got rid of the terrible noise permanently.
Pete–
The original message included these comments:
I’ve heard about various applications of things and stuff to appease
an angry fan belt.
Any advice to quieten a spasmodiacally squeaky fan belt?
–
68 E-type OTS, 96 X305 XJ12
Cambridge, United Kingdom
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dawnl wrote:
Any advice to quieten a spasmodiacally squeaky fan belt?
Multi-groove or regular V? If it’s a multi-groove, the fix is to
grind the points off the ridges in the pulleys. If it’s a regular V,
I heard once that regular bar soap will do the trick, though I
haven’t tried it myself.
– Kirbert
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I don’t use regular soap on a V12. I use the one that says,
“…because you’re worth it.”
Paul Clarkson
The Opus Ignition Solution:
http://www.reopus.co.uk-----Original Message-----
I heard once that regular bar soap will do the trick, though I
haven’t tried it myself.
– Kirbert
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In reply to a message from Paul Clarkson sent Sun 28 Jun 2009:
thanks for all your input.
ill watch sex and the city…they may have some ideas what I can
put on it.
thanks blokes
stratton–
dawnl
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In reply to a message from dawnl sent Sun 28 Jun 2009:
Wish I’d never posted on this thread. My Wife’s Discovery has
started squeaking again after only about 2500-ish miles on the new
belt. Will try a shot of dressing but am not optimistic for the
medium term.
Kirby, can you expand (or ‘contract’ LOL) onm this business
of ‘grinding’ the tops off the vee points?
Pete–
68 E-type OTS, 96 X305 XJ12
Cambridge, United Kingdom
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In reply to a message from PeterCrespin sent Mon 29 Jun 2009:
Hello !
Well, it’s not Kirbert, but this trick works quite well : more than
often, the ‘‘Vs’’ on the pulley are slightly higher than theyr
conterpart grooves in the belt, thus mindering the contact surface
to the top of these ‘‘Vs’’, so ‘‘squeeeek’’
By grinding them, one can allow the belt to sit proprly on the
pulley, so a little more belt tension and no more ‘‘squeeek’’.
It can be made, depending of the pulley material, with sandpaper
fixed on a flat surface and turning the pulley by the hand if
alluminium or, if steel, it’s better to use a lathe.
By the way, my wife’s toy is the XJ SC, mine is a Defender … So,
been there, done that …
Cheers–
The original message included these comments:
Wish I’d never posted on this thread. My Wife’s Discovery has
started squeaking again after only about 2500-ish miles on the new
belt. Will try a shot of dressing but am not optimistic for the
medium term.
Kirby, can you expand (or ‘contract’ LOL) onm this business
of ‘grinding’ the tops off the vee points?
–
Philippe, XJSC 87 Strasbourg
STRASBOURG, France
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In reply to a message from Klebs sent Mon 29 Jun 2009:
Hmm, thanks - I think. There’s no way I’m taking the front off the
car to turn down the alternator, crank, water pump and power
steering pulleys :-(. They all look shiny on the tips.
I’ll look at the similar pulleys on the X305 V12 and my spare 6.0L
engine to see if they look different in terms of contact areas &
tip polish.
Pete–
68 E-type OTS, 96 X305 XJ12
Cambridge, United Kingdom
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PeterCrespin wrote:
Kirby, can you expand (or ‘contract’ LOL) onm this business
of ‘grinding’ the tops off the vee points?
The problem is with the multi-groove belts only. Each little V is
supposed to wedge into its groove the same way as the regular V-belt.
However, if the points between the grooves are taller than the
corresponding grooves in the belt itself, the belt rides around on
the points rather than wedging down into the grooves. The result is
horrible squealing that doesn’t seem to go away with overtightening
the ^%&* outta the belt. You can usually see visual indicators: The
top of the ridges on the pulley are very shiny, and the sides of the
grooves in the belt don’t look like they’re getting nearly as much
wear as the bottoms of those grooves.
The solution is simple in theory: Grind the points off those ridges,
allowing the belt to sit down in the grooves like it’s supposed to.
Once these tips are ground down, the belts are silent, and you don’t
need to overtighten them. And it’s not likely you’ll grind too much
off those points; you could grind the ridges halfway off, wouldn’t
hurt anything.
The problem, of course, is actually doing the grinding. Taking the
pulley off the car and carrying it to a machine shop and writing a
check would be the right way to do it, of course. The last time I
did one, I just used a hand file for a few minutes, trying to keep
the depth of the filing reasonably uniform around the circumference
of the pulley.
I would suggest resisting the temptation to just start the engine and
hold a grinding stone against the pulley as it runs.
– Kirbert
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In reply to a message from Kirbert sent Tue 30 Jun 2009:
Maybe if I reinstalled the old belt first 
No room for a grinder actually - shame…
Pete–
The original message included these comments:
I would suggest resisting the temptation to just start the engine and
hold a grinding stone against the pulley as it runs.
–
68 E-type OTS, 96 X305 XJ12
Cambridge, United Kingdom
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