I prefer to not take this engine apart. It's been sitting for over 20 years. Before that, it had roughly 1,200 miles on the build. I'm having trouble getting it clean. I left Gunk Engine Brite on for about 30 minutes and sprayed with a 2,700 PSI pressure washer (cold). I understand that there's a stronger Gunk in a gel form. I've also used oven cleaner for similar things. Any advise on getting this thing clean enough without disassembly?

Also, the cylinders look like they could use powder coating or paint. I can mask for paint. Any recommendations? Flat or satin black is my preference.

 

Wow, those are pretty bad. For cast aluminum, try a stainless steel wire brush. You can get one at Home Depot for just a few bucks, but make sure it's stainless steel. If it works for you, you can buy stainless steel wire brush wheels and use a drill, but first just try the brush on an area where you can test. If you end up cleaning up the aluminum parts with the wire brush, go over it afterward with Blue Magic metal polish. It will turn black at first, but keep wiping it off and it will bring back some shine. It will also leave a silicone film that will protect the bare aluminum.

For smooth aluminum, you can use a grey scuff pad along with Blue Magic or Nevr-Dull.

My only take on painting is to go with powder coat for engine parts.

Good luck!

 

Thanks for that. I'm not powder coating because I don't want to tear down the engine. This one has been sitting in a garage for about 20 years after a year of being run on a fresh rebuild.

I'm planning on using PJ1 on the steel:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I'm planning on polishing all of the smooth aluminum that I can get to or remove. I'll just clean the heads up the best I can.

 

To make that engine look better you're going to have to break it down. No way around it. You can't paint or powder coat over rust and expect it to hold.

 

sand blast it

 

sand blast it

 

Thanks for the feedback. After another dose of Gunk and pressure washing, it's obvious that I'm faced with either taking the top end apart or taking a shortcut and missing an opportunity to get this looking right. I'm going to take the time to do it right.

Thanks, guys. Big help.

 

It'll be a lot of work, but you'll be glad you did.

 

Well to get by which isn't going to hurt anything because you will possibly need to tear it down for powdercoat, I have painted engines before with Ace Hardware BarBQue Black paint I would go satin. what I do is where you do not want paint is tape it off with masking tape and paper. And the little trick is take your paint nozzle and insert a straw from like a Brake Cleaner or Carb cleaner can and spray paint thru the straw, practice a little before applying to engine try on cardboard first. It WORKS good luck give it a "SHOT" other thing you can use is from an

auto parts/ home depot store they have like baby food jars with a pressurized nozzle that you can spray auto paint thru.http://www.homedepot.com/p/Preval-9-...-267/202533738

Use highest temperature paint you can find 1300-2000 degree, after painting start it up run a few minutes shut it off let cool down start er up let run few more minutes shut her down do this few times then take for a ride heat er up to about 400 degrees and let er cool again should be good to go.