Over Ambitious Powder Coater (1 Viewer)

[KFJ45]

I think I know the answer to the following but I’ll toss it out there for s***s & giggles. My Powder Coater got a little ambitious and also did the inside of the knuckles. I’m thinking it’s best to have them blasted out to bare metal. Thoughts...???

 

[KLF]

How would it hurt anything? Chase the threads, install and go.

 

[ferg]

Leave them coated. Won't hurt anything and will be easier to clean when the time comes.

 

[PAToyota]

I’ve seen people go a bit crazy with paint and do such things. There it is an issue if the paint won’t stand up to grease/oil/etc and start gumming things up. But the powder coat shouldn’t have those problems.

 

[KFJ45]

Alright, the kind of answers/opinions I was hoping for!! I agree PAT, that was my only thought on the coating breaking down over time but the P/C is pretty solid thx to the baking vs. plain paint.

My PowderCoater here in south Jersey does an outstanding job. Super fussy and reasonable$$. I think I’ll finally get the build thread going. Lots of “Cruiser Porn” to post.

Thx for the quick responses!

 

[franklin40]

i want him to do my knuckles next!!

 

[FixedIt]

I like it

 

[1969FJ]

I agree the powder coat inside is fine. To me it looks like when blasted, the threads were not protected. ? To me that is a no-no. Not that they will not function, but I am particular on threads and machined surfaces.

 

[Nader]

This might be regarded as an old performance benefit, or "speed secret" if you will. Builders of NASCAR engines used to paint the insides of the engine blocks in an oleophobic paint to expedite oil drainage down to the sump. In a chassis part, I'm not so sure.

 

[emac]

When I had my frame PC he plugged almost all the threaded holes. The ones that got coated required a tap to clean them up. That stuff is tough. I should have PC the entire rig!

 

[Rock40]

Don't sweat those knuckles, just run them. Blasting the threads isn't a big deal either.

 

[69LC]

I would have had him coat the ring face areas too. With the stock flimsy rings in the rust belt that area gets pretty bad. Once I have my HD stainless rings available, that shouldn't be a problem anymore.

 

[KFJ45]

Thx everyone for the responses. I guess we'll call this one of those "Happy Accidents" and run them as is.

Don't sweat those knuckles, just run them. Blasting the threads isn't a big deal either.

Thx Rock. Appreciate the comment. I've been closely following your build with Jason. Absolutely beautiful work. And a huge help as are the many build threads here on MUD. I'm going to be playing catch-up and start my Build Thread shortly. Same plan as you guys, Frame-off, 1978 Aussie FJ-45. Stay tuned...

I agree the powder coat inside is fine. To me it looks like when blasted, the threads were not protected. ? To me that is a no-no. Not that they will not function, but I am particular on threads and machined surfaces.

Thx 69FJ. Fully agree. Pic is a little deceiving. I had already pulled the plugs from the threads before taking the pic. I guess a little bit of P/C got into the threads from the inside spray. My Powder Coat shop is a family run operation and super attentive to detail. I checked out 3 or 4 in my area before settling on these guys and I haven't been sorry. I guess in this case he got a little over zealous. They did my frame and plugged every thread. Not much to clean up.

 

[bikersmurf]

Too bad he's not local... I would like someone who does that kind of work.

 

[PAToyota]

This might be regarded as an old performance benefit, or "speed secret" if you will. Builders of NASCAR engines used to paint the insides of the engine blocks in an oleophobic paint to expedite oil drainage down to the sump. In a chassis part, I'm not so sure.

Glyptal Red Enamel

Recommended by many high performance engine rebuilding books, Glyptal seals the tiny ports left in metal after bead blasting and leaves the engine block interiors smooth. Helps keep the oil clean and flowing freely. Acid and oil resistant. Used on generator and alternator armatures. Glyptal has great electrical insulating properties too!

 

[1969FJ]

Glyptal Red Enamel

Exactly why machined surfaces should not be sand blasted. The result is NOT a smooth surface after sandblast. It may work in a rough environment but It is so easy to avoid messing up machined surfaces.

 

[1911]

Glyptal Red Enamel

Indian Motocycle used to paint the inside of their crankcases with Glyptal from the factory. That s***'s been around for a long time.

 

[KFJ45]

Exactly why machined surfaces should not be sand blasted. The result is NOT a smooth surface after sandblast. It may work in a rough environment but It is so easy to avoid messing up machined surfaces.

Any suggestions 69?? They protected all the other machined surfaces (steering arms, caps, etc.). First time they let this happen.

 

[1969FJ]

Well, powder coater here uses sacrificial plugs/hardware for the threaded holes. They use a very thick tape made for machined surfaces like where the bearing races would reside. Sometime plugs if they fit well.

 

[2fpower]

Silicone plugs. I use them too when powdercoating. Work great.