Go Back  Offshoreonly.com > Technical > Do It Yourself, Boating on a Budget
Painting an engine. What not to do? >

Painting an engine. What not to do?

Notices

Painting an engine. What not to do?

Thread Tools
 
Old 06-29-2018 | 11:43 AM
  #1  
Thread Starter
Registered
10 Year Member
 
Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Default Painting an engine. What not to do?

Seems like a stupid question, but I do a lot of stupid stuff.

getting ready to paint the engine and tid bits. The block had been dipped and primered at the machine shop. Tid bits like the pulleys, water pump, etc have yet to be media blasted.

My main question is can you use a normal urethane to paint the block or will it bake off? Looking to go with the ever popular Merc blue which I believe can be found in quarts these days. I know dupli color has a Dodge color that’s pretty darn close.

Is it fine to paint aluminum cylinder heads? I just don’t see it often.

Thanks!
Baja Rooster is offline  
Reply
Old 06-29-2018 | 12:26 PM
  #2  
Registered
10 Year Member
 
Joined: Apr 2014
Posts: 650
Likes: 123
From: North Florida
Default

I primed my heads and intake with zinc chromate and then painted to match the rest of the engine. I used header paint on the exhaust ports because the paint cooked off there on my last engine. Of course my engine is all black and it will be kind of hard for you to find a blue header paint. I’m not sure how it will all work out over time yet but the zinc primer is great.
ph1971 is offline  
Reply
Old 06-29-2018 | 01:08 PM
  #3  
glassdave's Avatar
Neno the mind boggler
20 Year Member
Super Moderators
 
Joined: Sep 2001
Posts: 13,080
Likes: 320
From: toledo oh
Default

Originally Posted by Baja Rooster
Seems like a stupid question, but I do a lot of stupid stuff.

getting ready to paint the engine and tid bits. The block had been dipped and primered at the machine shop. Tid bits like the pulleys, water pump, etc have yet to be media blasted.

My main question is can you use a normal urethane to paint the block or will it bake off? Looking to go with the ever popular Merc blue which I believe can be found in quarts these days. I know dupli color has a Dodge color that’s pretty darn close.

Is it fine to paint aluminum cylinder heads? I just don’t see it often.

Thanks!
i use either SEM's etching primer (in an aerosol) or PPG's DP epoxy primer as a base layer and use single stage Concept all the time for engines/parts. My preference for Merc blue is Chryslers PB3 (ppg code 5357). Its a great match to the merc color but with more pearl.
__________________
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
glassdave is offline  
Reply
Old 06-29-2018 | 02:17 PM
  #4  
Thread Starter
Registered
10 Year Member
 
Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Default

Thanks, guys! These were the exact answers that I was looking for. :thumbup
Baja Rooster is offline  
Reply
Old 06-29-2018 | 03:07 PM
  #5  
Registered
 
Joined: Mar 2012
Posts: 4,189
Likes: 55
From: Cape coral, FL
Default

I did mine garage. Used an actual spray gun from harbor freight luckily engines hide imperfections. Lol. Used an epoxy primer and painted with an HOK color I really liked then used an imron clear.
Crude Intentions is offline  
Reply
Old 06-29-2018 | 03:22 PM
  #6  
Registered
10 Year Member
 
Joined: Apr 2014
Posts: 650
Likes: 123
From: North Florida
Default

That DP that Glass Dave is talking about is the sh!t. We use it on our hot rods.
ph1971 is offline  
Reply
Old 07-02-2018 | 07:14 PM
  #7  
Registered
15 Year Member
 
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
Default

Originally Posted by glassdave
i use either SEM's etching primer (in an aerosol) or PPG's DP epoxy primer as a base layer and use single stage Concept all the time for engines/parts. My preference for Merc blue is Chryslers PB3 (ppg code 5357). Its a great match to the merc color but with more pearl.
X2.... never any issues using single stage. Lots use rattle can heat paint but not necessary and doesn't leave as nice of finish. Like dave said the epoxy primer either way.

I played with the old 81 b8110a with decent results but had to mix in more silver. Gonna have to try the Chrysler sometime. Glad you mentioned that.
getrdunn is offline  
Reply
Old 07-07-2018 | 06:10 PM
  #8  
Registered
 
Joined: Sep 2009
Posts: 419
Likes: 14
From: Lake Winnipesaukee, NH
Default

Most paint is hazardous, but that zinc chromate is supposed to be super bad for human contact. If you use it be sure to cover up and use a real respirator.
NHGuy is offline  
Reply
Old 08-20-2018 | 11:27 PM
  #9  
Thread Starter
Registered
10 Year Member
 
Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Default


Originally Posted by glassdave
i use either SEM's etching primer (in an aerosol) or PPG's DP epoxy primer as a base layer and use single stage Concept all the time for engines/parts. My preference for Merc blue is Chryslers PB3 (ppg code 5357). Its a great match to the merc color but with more pearl.
I went with the 5357. Pretty stoked with it.
Baja Rooster is offline  
Reply
Old 08-21-2018 | 10:30 AM
  #10  
Thread Starter
Registered
10 Year Member
 
Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Default

I should add that painting air gaps suck, lol. I had to grab a paint brush to smoosh the paint in some areas and try to fog over it to smooth it out.
Baja Rooster is offline  
Reply


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.