Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: alexdecker on March 20, 2022, 05:09:05 PM

Title: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 20, 2022, 05:09:05 PM
Hey all

I am getting conflicting reports on engine paint, and wether or not to prime before painting or not. I have always been taught to prime first for the best result. Saw several threads on here that talks about a self-etch primer before the paint.

Can somebody shed some light on this for me?
Title: Re: Painting engine case - to prime or not to prime?
Post by: taysidedragon on March 20, 2022, 05:16:29 PM
I use Simoniz engine paint. No primer required
Title: Re: Painting engine case - to prime or not to prime?
Post by: philward on March 20, 2022, 09:21:26 PM
Same here - done my SOHC's in Simoniz and confirm no primer required as per instructions
Title: Re: Painting engine case - to prime or not to prime?
Post by: Nurse Julie on March 20, 2022, 09:46:10 PM
Simoniz for us, no primer.
Title: Re: Painting engine case - to prime or not to prime?
Post by: Johnny4428 on March 20, 2022, 09:47:04 PM
Me too, no primer. But must bake to cure.
Title: Re: Painting engine case - to prime or not to prime?
Post by: Kelly E on March 21, 2022, 01:35:53 AM
I use Duplicolor engine primer now. The Duplicolor engine paint comes out better with it.
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 21, 2022, 06:23:28 AM
I use Duplicolor engine primer now. The Duplicolor engine paint comes out better with it.

Is that for the Black or the Grey as Well? What color and primer have you used if I may ask?
Title: Re: Painting engine case - to prime or not to prime?
Post by: Kelly E on March 21, 2022, 01:59:13 PM
I use Duplicolor engine primer now. The Duplicolor engine paint comes out better with it.

Is that for the Black or the Grey as Well? What color and primer have you used if I may ask?

The aluminium colour is the Duplicolor engine primer and paint. The black is Seymour MRO primer and paint in rattle cans. It's supposed to be gas and chemical resistant. If I spill gas on it I have to rewax it but no damage.
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 21, 2022, 04:04:39 PM
Any love for the MoTip or VHT engine painting?
Title: Re: Painting engine case - to prime or not to prime?
Post by: Nurse Julie on March 21, 2022, 04:15:21 PM
Any love for the MoTip or VHT engine painting?
Never heard of MoTip but the Simoniz a majority of us use is VHT. SIMVHT31D
Title: Re: Painting engine case - to prime or not to prime?
Post by: oldchuffer on March 21, 2022, 05:17:38 PM
For what its worth i use Motip engine paint, cant fault it.
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 21, 2022, 06:14:18 PM
Any love for the MoTip or VHT engine painting?
Never heard of MoTip but the Simoniz a majority of us use is VHT. SIMVHT31D

Ah, I meant the actual brand VHT: https://www.vhtpaint.com

I've heard it's the same as Duplicolor, but can't confirm it. Would love to go Simoniz, but haven't found a EU dealership where I don't have to pay more for shipping than the actual paint, so just checking out if others had any good ideas :)
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 22, 2022, 06:55:52 AM
For what its worth i use Motip engine paint, cant fault it.

Nice, you use the heat resistant one? They call it just grey, right? You wouldn't happen to have a pictures of your engine painted in it, would you?
Title: Re: Painting engine case - to prime or not to prime?
Post by: oldchuffer on March 22, 2022, 07:08:48 PM
This is from my CB750KZ before putting the engine back in.
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on March 22, 2022, 08:40:04 PM
This is from my CB750KZ before putting the engine back in.

Can you tell me exactly which one you used? MoTip is readily available for me, but it comes in both grey, aluminum and silver and I’m not sure which one to use. Yours look nice!
Title: Re: Painting engine case - to prime or not to prime?
Post by: Oddjob on March 22, 2022, 09:35:46 PM
Wonder why Honda did that with the front bolts on the KZ engine, by leaving the top of the bolt hole exposed it invites water to enter and rust the screw into the casing, so it either snaps when trying to get it out or rounds off or strips the thread out. I'd fill that up with some grease if I was you, poor design.
Title: Re: Painting engine case - to prime or not to prime?
Post by: oldchuffer on March 23, 2022, 04:36:27 PM
Its the aluminium one.
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on April 02, 2022, 12:12:20 PM
Follow up question: How many cans of paint to paint entire engine?
Title: Re: Painting engine case - to prime or not to prime?
Post by: McCabe-Thiele (Ted) on April 02, 2022, 12:49:32 PM
Follow up question: How many cans of paint to paint entire engine?

I think I used two - it allows for some waste when blowing out the paint with the can upside down - plus some left overs for touching in if needed..
Title: Re: Painting engine case - to prime or not to prime?
Post by: alexdecker on April 02, 2022, 03:59:41 PM
Great, thanks! :)