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magnetic
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I'd really like to get the engine looking fresh, and paint thinner with scrubber is not doing the trick.

Any advice?

schrader7032
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VBMWMO #7032
San Antonio, TX
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What do you use to make your engine bright (Air head)

I've never really heard of the silver bullet on that one...I went through a restoration on my /2 and since I had everything all apart, I could go at things easily. The heads were bead blasted; I took the bare block to the car wash and used Scotchbrite pads and elbow grease. I tackled a few odd pieces like valve covers and engine covers with either more bead blasting or scotchbrite pads and Wally World foaming engine cleaner.

I tried probably a dozen cleaners, from mag cleaners, welding supply cleaners, Never Dull, etc., and nothing really worked. Oak Okleshen recommended Nice n Easy Storm Door and Screen cleaner but that left a dullness to the aluminum. It has phosphoric acid in it and if left on too long it can stain the aluminum. I've heard people use Simple Green but again, if left on too long, it can etch the aluminum.

The best I found was foaming engine cleaner and/or WD-40 and the Scotchbrite pads...the thin green kind. Don't use steel wool or brushes...you might could try some brass brushes. Maybe you can get some ideas here:

http://pweb.jps.net/~snowbum/alcorr.htm

Kurt in S.A.

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'78 R100/7 '69 R69S '52 R25/2

magnetic
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What do you use to make your engine bright (Air head)

I read somewhere that Muratic acid(hydro cloric acid) worked well to remove the oxidation, however I am a little leary to do this with out some confirmation.

The engine is very clean, its just the oxidation that I am looking to get rid of. Especially on the head fins where I can't really scrub.

schrader7032
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What do you use to make your engine bright (Air head)

For the head fins, you might try and find some brass bottle brushes...not sure if that's the term. They consist of a center wound steel wand with brass bristles inserted in a conical shape. The diameter of the bristles come in various sizes. I saw some at a swap meet and decided to get them. Or you could go to a gun shop and see what they have for bore cleaning tools. These would allow you to get between the fins. Also, that scotchbite pad works pretty well when it's folded in half...allows you to stuff it down in there so you can work it back and forth.

Kurt in S.A.

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magnetic
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What do you use to make your engine bright (Air head)

Yeah I have been looking for something like those brass bottle brushs, and none of the hardware stores arround here have anything servicable. I'll keep looking, though I did buy some muratic acid, I will try it on a little underside patch and report the effectiveness Tongue

EuroIron
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What do you use to make your engine bright (Air head)

stainless steel wool works very well

I make my own but you can buy it in several grades

many scrubbing mediums leave deposits in the pores........ actual ferrous steel wool is the worst offender........ and will cause never ending oxidation

if you rinse your cases with water after acid..... add white vinegar or they will very likely turn an unpleasant dark gray

EuroIron
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What do you use to make your engine bright (Air head)

and if I got any of that backwards or out of order

I'm sure you'll be able to figure it out

ohhh.... many aluminum polishes leave residues in the pores that will turn a chalky white over time......

R.D. Green
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What do you use to make your engine bright?

S100 engine cleaner does a pretty good job at generally brightening things up. For really dis-colored, stained, and grungy engine cases, I've used a product called Aluma-Brite. You cut it with water and scrub it on with a plastic Tuffy-Pad or the like. Work from the top down and then flush it off with water. Pretty amazing stuff and leaves no residue whatsoever. Doesn't seem to bother paint but I'd still be careful with it. You might find it at a marine supply store. Also good on non-aluminum bits and pieces.

Richard

magnetic
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What do you use to make your engine bright (Air head)

Thanks for the advice, the hydro cloric did leave a gray residue. I am going to try a few other things then I will report back what worked best.

EuroIron
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What do you use to make your engine bright (Air head)

it will brighten now with stainless steel wool and a stainless steel tooth brush will go a long way to getting the pores bright as well

the minerals in tap water......... distilled maybe too but I don't know for sure because I've never tried it......

will gray freshly blasted cases unless you add white vinegar

I typically boil freshly blasted engine bits in a big lobster pot to hopefully loosen and remove any embedded media

but only if they will not fit in my big ultrasonic

I used to use a two step wheel cleaner for spoked car wheels, by eagle, one acid and another neutralizer...... seems like it didn't work out well for aluminum because of the discoloration

bombard4101
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What do you use to make your engine bright (Air head)

I had really good luck on the cases of my '66 using WD40 and a wire wheel in the die grinder, although it did leave the cases looking somewhat shiny.
Even better, I found a product at a marine store named SLX, made for cleaning outdrives and other exposed metal on boats. With much skeptisism, I tried it on the 30 year old never been cleaned front hub and couldn't believe it!! Really worked great. I use it all the time now for all kinds of cleaning. Works great for getting off the white residue that seems to leech from the cases and other parts. And it didn't hurt the paint.
It is phosphoric acid, though, so it must be washed off, and gloves are nice too. It's a thick pink liquid that goes on with a green scrubby and left for 15 or so minutes, then rinsed off. Even have seen a diluted version of it in Winn Dixie for floor cleaning.

bombard4101
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What do you use to make your engine bright (Air head)

As far as the heads/valve covers go, if you really want them to look great and not spend time doing it, blast 'em. It's pretty cheap, lasts a long time and looks like new. And because of the black barrles seperating the cases and heads, it doesn't stick out like a sore thumb.

c.d.iesel
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VBMWMO #5514
Darien, Connecticut.
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BRITE ALUMINUM

SIMPLE GREEN

spray on warm - NOT HOT motor, and scrub with soft brush.
Hose off.
for really heavy oil & grease, begin with Brake Kleen,
then follow with SIMPLE GREEN

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saintclair2703
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What do you use to make your engine bright (Air head)

I use Simple Green at the car wash. I tried that S100... I'm still fuming. It left my cases super streaked. I hate that stuff.

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EuroIron
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What do you use to make your engine bright (Air head)

brake clean will put a hurting on painted surfaces

so if you use it to cut grease and oils off an engine

spray it on a rag

and if you have perfect paint

don't use brake clean on it

or carb cleaner either

R.D. Green
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What do you use to make your engine bright

This question has come up before. I've used WD-40 with a plastic "scrubby" and gotten good results. The best results I've ever gotten, however, were with a product called "Alumabrite" and a scrubby. You cut it about 50/50 with water; work it in from the top down; flush off with water. It did an amazing job on my R27 and left no streaks or spots. You might be able to find the stuff at a marine supply store.

hollister7112
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engine cleaner

I have used citra solve for years and never had any problems with it. I use it strait, rinse it off.

saintclair2703
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What do you use to make your engine bright (Air head)

Never heard of Citra Solve. Where would I get that?

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hollister7112
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What do you use to make your engine bright (Air head)

Home Depot. Wear gloves. I've never found anything better short of bead blasting.

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