Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: johnm37 on June 15, 2023, 09:05:27 PM
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The engine on my F2 is painted black. Recently it began to show it's age. The aluminium was showing through and had begun to corode.
About 3 years ago, i had my local motorcycle guy blast and paint my engine. He didn't do a good job. The aluminium is already showing. As the engine is out, now is a good time to repaint it. I'm reluctant to use the same painter. Will ordinary aerosol car paint work? Will it take the temperature?
Has anyone else repainted their engine?
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Are you going black again?
If so
Make sure the surfaces are clean,
Try Rustoleom black BBQ paint,
Obviously heat proof,
Not sure if it's gloss or matt,
But they do other heat proof rattle can paints
Sent from my SM-A750FN using Tapatalk
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Rustoleum is great paint with good cover.
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Some engine spray paints specify using a primer. These last longer in my experience. Don't recall the brands I used, sorry. I've also had problems with what my 750 engine came with. It was the David Silver spray can they supply. After many heat cycles, I can still see a silver deposit on cloths when I wash the bike. But that might be poor preparation.
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Rustoleum say no primer needed on metals. They make a primer for painting onto wood & fabric.
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I did my CB750F2 in Simonize VHT black gloss. The cases were bead blasted first and well degreased and heated in the oven to dry them completely. They were okay for a while but now I get the black paint dropping off the ends of the fins (but only on the ends not front or back). Every so often I cover things up and respray the ends of the barrels and head. It's okay then for about 1500 miles before I have to do it again. Probably the movement in the metal with heating up and cooling down. I will just have to live with it. If I was doing it again I would get them done with Ceracoat Ceramic paint.
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I have used the Simonize silver engine paint with great results (lots of members use it and recomend it) - just googled for black equivalent and found this - SIMONIZ VHT TOUGH BLACK SATIN 500ML. If its like the silver its really good to use but does need cring with heat.
Perhaps - New Holts LOYSIMVHT51C Simoniz Tough Paint, 500 ml, Black Satin on ebay
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I've ordered 250ml of Granville satin black engine oaint from Opie oils https://www.opieoils.co.uk/p-125890-granville-high-temperature-cylinder-paint-black-satin.aspx?variantid=225149
It has good revuews on Amazon so I will give it a try. I would prefer to spray it to get better coverage in the fins. I may try that if I can find a suitable thinner.
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Satin often brushes on well with a half decent brush leaving little or no brush marks.
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It lokks like Xylene is thd thinner for Granville paint. That's the same as Hammerite. I've ordered some of that too. Let's hope it works.
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I have had excellent results with PJ1 fast black - https://www.mandp.co.uk/products/pj1-satin-black-engine-and-case-paint-400ml-522877 (https://www.mandp.co.uk/products/pj1-satin-black-engine-and-case-paint-400ml-522877) over 2 years now on my CBX1000C and still looks as sprayed.