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WD40

Myths, Legend, miraculous cures and major damage claimed to be caused by the Blue and yellow can of mystery.

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Stuart C02/08/2020 19:10:40
138 forum posts
4 photos

It knocks out fire ants.

cymaz02/08/2020 19:38:01
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9333 forum posts
1211 photos

I found THIS . I can’t vouch for the findings though

Doc Marten02/08/2020 19:43:59
729 forum posts
7 photos
Posted by Bob Cotsford on 02/08/2020 19:08:20:

Doc, I used to blast everything under the fairings which areas are traditionally prone to oxidation. Especially useful on Aprilia wiring! When maintenance was needed everything came apart much more easily. It was very effective for winter protection of alloy frames too as I used to ride throughout the year in days gone by.

My days of year round riding are in the past also.

I'm a Triumph man myself but I'll take an Aprillia Vee without any persuasion.

WD40 is also useful for tracking cracks in the rubber inlet hoses, spray on the suspect area with the engine running and watch for the 'puff ' of smoke from the exhaust.

dave windymiller06/08/2020 20:23:44
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113 forum posts
149 photos

Re the bird muck thing, my understanding is when you wash away the muck and find the paint surface has been damaged by it, wd40 is used to soften the paint allowing it to polish easier and quicker (using t-cut or similar).

I know wasps in jars dont like it from the "experiments" we did as kids! They'd rather sting themselves to death!

Geoff S06/08/2020 21:57:26
3769 forum posts
36 photos

I used to spray it on the magneto of my motorcycles when they wouldn't start after standing out in the rain. I think WD stand for Water Displacement.

Geoff

cymaz06/08/2020 22:00:22
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9333 forum posts
1211 photos
Posted by Geoff S on 06/08/2020 21:57:26:

I used to spray it on the magneto of my motorcycles when they wouldn't start after standing out in the rain. I think WD stand for Water Displacement.

Geoff

It does, apparently it was the 40th formula that was tried

Trevor Crook07/08/2020 08:06:26
1003 forum posts
71 photos

It helps remove old silicone sealant from around the bath.

It works as a switch cleaner.

Barryorbik07/08/2020 13:05:39
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127 forum posts
3 photos

Trevor, be careful not to spray it onto printed circuit boards though, as it will be absorbed by the fibres and results in internal short circuits in tghe PCB. A friend sprayed his new and very expensive Futaba transmitter board, thinking it would help protect it in inclement weather condition, but it actually destroyed his transmitter.

Engine Doctor07/08/2020 14:05:27
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2588 forum posts
40 photos

I vaguely remember when WD 40 first came out that it as featured on the BBC "Tomorrow's World " program . They sprayed the insides of an electric drill then put it under water while running . Usual comment " don't try this at home" were used before the shot. Imagine that being shown on TV today? WD 40 has certainly stood the test of time and seems to be used as a generic name for penetrating maintenance sprays ; like Hoover is used for Vacuum cleaners.

MattyB07/08/2020 14:30:48
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2211 forum posts
32 photos

A quick observation... This is a very mild mannered conversation compared to when WD40 is raised on a cycling (pedal, not motorcycling) forum. Some swear by it for degreasing and lubricating chains, others are convinced it will knacker your chain, remove all grease from your bearings, cause everything to immediately start creaking and is generally the devils work! Full on warfare has been known to break out on this topic...

Me, I use it wherever grease is not present for localised degreasing/cleaning - chains, sprockets (off the bike), suspension bushings etc, being careful not to spray anywhere near a greased bearing or brake disc. I always use a dedicated chain lube though as WD40 isn’t a very effective lubricant (chains generally start squeezing after only 30 miles).

Edited By MattyB on 07/08/2020 14:32:32

Doctor Chinnery07/08/2020 14:52:11
55 forum posts

OK chaps - so instead of WD 40, what should I be using else as an effective penetrating oil, in particular when dealing with bolts ( & nuts ) seemingly fixed for eternity with 20+ year old baked caster oil?

Maurice Dyer07/08/2020 15:53:40
102 forum posts

Been around engines and full size aeroplanes over 50 years. In most of the world's countries. We call ( I'll spray it everywhere WD) slow setting cement.

Gary Murphy 107/08/2020 16:44:14
462 forum posts
22 photos

I have a old can of WD40 and the cap is stuck on fast. What would you suggest to aid removal ? : )

Doc Marten07/08/2020 19:00:54
729 forum posts
7 photos
Posted by Gary Murphy 1 on 07/08/2020 16:44:14:

I have a old can of WD40 and the cap is stuck on fast. What would you suggest to aid removal ? : )

6 weeks in the gym! laugh

john stones 107/08/2020 19:28:50
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11648 forum posts
1517 photos
Posted by Gary Murphy 1 on 07/08/2020 16:44:14:

I have a old can of WD40 and the cap is stuck on fast. What would you suggest to aid removal ? : )

Let the wife have a try. embarrassed

Engine Doctor07/08/2020 19:35:05
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2588 forum posts
40 photos

Best penetrating liquid is /was Plus Gas . Not sure if the new stuff is as potent as the old stuff .

J D 807/08/2020 19:47:24
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1586 forum posts
87 photos

+1 with ED on Plus Gas . Modern equivalent is RP - 90 from Action Can.

Martin Harris07/08/2020 20:01:44
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9501 forum posts
256 photos

I've found Tri-Flow to be extremely effective.

Doc Marten07/08/2020 20:01:55
729 forum posts
7 photos

ATF and acetone makes a home brew penetrating oil.

Trevor Crook07/08/2020 22:28:31
1003 forum posts
71 photos

Barry, point taken about being careful where it goes as it's known to attack some rubbers and plastics. My wife's car key buttons had got very intermittent, and having been told of its switch cleaning properties I thought nothing to lose. I probably got the stuff all over the little circuit board, but it fixed the problem and 2 years later it's still fixed. Just because I got away with it doesn't mean it's harmless though.

It really does help removing old silicone, but obviously a thorough degrease is needed before applying fresh stuff.

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