How to deal with oxidation on engine cases?

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2valve
Posts: 233
Joined: Wed Aug 11, 2010 10:00 am
Location: Glen Innes Australia

Re: How to deal with oxidation on engine cases?

Post by 2valve »

Sorry melville. I keep on thinking that you where doing the job.I must stop sniffing Fuel and gear oil.
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George Ryals
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Joined: Tue Aug 03, 2010 10:22 am
Location: Stone Mountain, GA

Re: How to deal with oxidation on engine cases?

Post by George Ryals »

To use the red hydraulic lift on an airhead with the exhaust pipes still on, you have to use wood blocks under the frame rails in order to not lift against the pipes.
Smile it's contagious!
'74 R90S, '67 /2 Conv w/sc, '66 R50/2
'74 Harley FXE, '72 Harley FLH w/HD sc
'69 BSA 441 Victor Special, '74 R90/6 Basket case
'85 R80RT wreck for parts
2valve
Posts: 233
Joined: Wed Aug 11, 2010 10:00 am
Location: Glen Innes Australia

Re: How to deal with oxidation on engine cases?

Post by 2valve »

Hi George.Thanks for the info.Thought that might be the case considering the length of the arms on the lift. I'll give the lift a miss,it's going cheap but it's not worth the paint job getting marked /damaged etc.
Major Softie
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Re: How to deal with oxidation on engine cases?

Post by Major Softie »

2valve wrote:Hi George.Thanks for the info.Thought that might be the case considering the length of the arms on the lift. I'll give the lift a miss,it's going cheap but it's not worth the paint job getting marked /damaged etc.
If you only intend to use it only on Airheads, then the real trick is to fabricate some risers that fit your bike perfectly. The lift is designed so it's really easy to bolt such parts right onto it.
MS - out
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bbelk
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Re: How to deal with oxidation on engine cases?

Post by bbelk »

I have a cheaper version of that lift (harbor freight), but the pads are about the same size. It does work on an Airhead with blocks. The only time my R90 has been on its side in 10 years was when it fell off that stand during dinner. I don't use it for the bikes any more.
1975 R90/6
1979 R65
Major Softie
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Re: How to deal with oxidation on engine cases?

Post by Major Softie »

bbelk wrote:I have a cheaper version of that lift (harbor freight), but the pads are about the same size. It does work on an Airhead with blocks. The only time my R90 has been on its side in 10 years was when it fell off that stand during dinner. I don't use it for the bikes any more.
Straps.
MS - out
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Ken in Oklahoma
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Re: How to deal with oxidation on engine cases?

Post by Ken in Oklahoma »

I'm coming into this thread late, but I want to say that I've never had good luck with liquid cleaners for aluminum. It's especially bad on as-cast surfaces, which is most surfaces on airheads. If you leave the chemical on too long (and it's hard to tell when is too long) the aluminum turns dark. I know of no remedy for that, other than lots of abrasive pads. And just try getting them between the spokes where they go into the hub.

I have had decent luck using aluminum paint, gently dabbed onto a pad, and then wiped over the as-cast surfaces.

Of course on machined aluminum surfaces most mild abrasives work well.

Ken
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There's no such thing as too many airheads
disston
Posts: 25
Joined: Sat Sep 21, 2013 4:39 pm

Re: How to deal with oxidation on engine cases?

Post by disston »

It is oxidation and cleaning will only be a temporary solution. The clean aluminum will oxidize again. I spray with WD-40 on a regular basis. Doesn't look as good as those cleaned and polished or soda blasted boxes but it is better than the white speckled effect.

I have used Mag Wheel Polish on some items that i wanted to look better but eventually that wears away so it's back to spraying with WD-40 again.
ME 109
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Location: Albury, Australia

Re: How to deal with oxidation on engine cases?

Post by ME 109 »

Every responsible airhead owner should pack up the bikes and family and move to the arid inland.

I never use any sort of alloy cleaner because there is no need. I feel for coastal airheads.
I do worry tho when airhead camping on the coast, but the oysters and beer subdue the worry. :mrgreen:

Gidday disston!
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malcom
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Location: Tomakin, the jewel of the Pacific

Re: How to deal with oxidation on engine cases?

Post by malcom »

ME 109 wrote:Every responsible airhead owner should pack up the bikes and family and move to the arid inland.

I never use any sort of alloy cleaner because there is no need. I feel for coastal airheads.
I do worry tho when airhead camping on the coast, but the oysters and beer subdue the worry. :mrgreen:

Gidday disston!
As well as the oysters &beer we now have to contend with local lake prawns, someone's got to do it.
Cheers
mal.com
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