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#4580542 - 11/20/17 09:17 PM greasing leaf springs to prevent rust?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4346
Loc: Houston, Texas
I'm going to put new leaf springs on my boat trailer since the old ones are getting too rusty. I figured I'd coat the new ones with grease since I have a ton of it that never gets used. Opinions?
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#4580548 - 11/20/17 09:24 PM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Donald Offline


Registered: 03/21/04
Posts: 19661
Loc: Upstate NY
I would use CarWell or Fluid Film to soak in between the leaves. I have started to do that on my boat trailer. You have them not installed so turn them sideways and let the stuff seep down.


Edited by Donald (11/20/17 09:24 PM)
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#4580559 - 11/20/17 09:37 PM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17465
Loc: Clovis, CA
You need something more penetrating than grease.

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#4580593 - 11/20/17 10:12 PM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Nick1994 Offline


Registered: 02/19/13
Posts: 9126
Loc: Phoenix, AZ
Auto Zone sells an aerosol can of Fluid Film, Even here in Phoenix.
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#4580618 - 11/20/17 11:46 PM Re: greasing leaf springs to prevent rust? [Re: Merkava_4]
JHZR2 Offline



Registered: 12/14/02
Posts: 40635
Loc: New Jersey
Originally Posted By: Merkava_4
You need something more penetrating than grease.


For starters, yes. This is a case where I'd coat with carwell/known and then pack with a waterproof grease after.

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#4580622 - 11/21/17 12:01 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
andyd Offline


Registered: 09/25/04
Posts: 6299
Loc: Marshfield , MA
Greasing leaf springs was a weekly chore on the '23 Chrysler lube schedule.
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#4580627 - 11/21/17 12:10 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
BrocLuno Offline


Registered: 09/06/15
Posts: 4472
Loc: Kalifornia Kollective
It works fine unless you are drive/towing in extremely dusty environs. The dust will work into the grease between the leaves and can act a polishing agent. You'll get accelerated wear. But, if not pulling on desert roads, no biggie laugh

We used to oil and grease the springs on the horse trailers so thet'd ride better and to resist the horse p laugh
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#4580637 - 11/21/17 01:01 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4346
Loc: Houston, Texas
I just see any kind of aerosol spray washing off as soon as it's dunked in the water.
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#4580643 - 11/21/17 01:43 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
redbone3 Offline


Registered: 06/09/12
Posts: 604
Loc: Reno, NV
I wonder if motorcycle chain lube might do for this job?
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#4580653 - 11/21/17 02:22 AM Re: greasing leaf springs to prevent rust? [Re: redbone3]
demarpaint Offline


Registered: 07/03/05
Posts: 28552
Loc: NY
Originally Posted By: redbone3
I wonder if motorcycle chain lube might do for this job?


It will work as good as FF, maybe better. It will have to be reapplied often though, just like FF.
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#4580657 - 11/21/17 02:43 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Ducked Offline


Registered: 10/25/12
Posts: 3252
Loc: Taiwan
I think some leaf springs are drilled and have a grease nipple so youy can grease them with a gun from the inside out

You could perhaps get that done if you can find someone who knows what they're doing. DIY or inexpert pro you might risk starting cracks.

Failing that heat the grease to above its melting point and run it in sideways, as suggested above

Or use oil. If concerned about it washing off, use vegetable oil, (though this will eventually set solid) or a blend.

You can get or make spring covers but you probably dont want that on a boat trailer.


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#4580720 - 11/21/17 06:29 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Donald Offline


Registered: 03/21/04
Posts: 19661
Loc: Upstate NY
Is the trailer dunked in fresh or salt water?CarWell or FF or Krown will not easily wash off. But they will eventually need to be reapplied.
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2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


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#4580723 - 11/21/17 06:38 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Ducked Offline


Registered: 10/25/12
Posts: 3252
Loc: Taiwan
Some British Leyland Sherpas had fibre reinforced plastic spring leafs. Dunno how unique that is but if you could get something similar it'd solve your rust problem.

Corvette transverse, some Mercedes and Audi, apparently

http://www.flex-form.com/products.asp

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#4580729 - 11/21/17 06:47 AM Re: greasing leaf springs to prevent rust? [Re: demarpaint]
JHZR2 Offline



Registered: 12/14/02
Posts: 40635
Loc: New Jersey
Originally Posted By: demarpaint
Originally Posted By: redbone3
I wonder if motorcycle chain lube might do for this job?


It will work as good as FF, maybe better. It will have to be reapplied often though, just like FF.


Yeah, that's why I didn't recommend FF prior to greasing, I feel that known/carwell film lasts a bit longer in hi wash areas.

My Saab, which had been to Krown multiple times, always had a slight dirt/oily residue on the struts and wheelwell components which was reassuring to me.

Top the known with grease to lock it in and I'm hoping it will stay wicked in longer.

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#4580775 - 11/21/17 07:53 AM Re: greasing leaf springs to prevent rust? [Re: motor_oil_madman]
Eddie Offline


Registered: 12/07/03
Posts: 9161
Loc: Florida, Cape Coral
Many leaf springs are meant to not have an external lubricate applied. The spring lief themselves are supposed to have a specific friction between them. I once had a vehicle with leaf springs and I jacked up the vehicle and sprayed oil between the leafs. The rear of the vehicle became very soft and was a danger to turn quickly. Ed
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