Painting engine

matt1

matt1

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I've had some rust on the engine which I have now applied fertan to. I'm ready to paint over these patches with the Yanmar engine enamel, which says to prime first.

What should I use? An etch primer or something like Isopon Zinc 182 ......or etch primer followed by zinc 182 for a really good result?? The engine is 10 years old and in excellent condition, but sadly a few small patches of rust where some warranty work wasn't done properly after the first season.

Thoughts?
 
matt1 said:
I've had some rust on the engine which I have now applied fertan to. I'm ready to paint over these patches with the Yanmar engine enamel, which says to prime first.

What should I use? An etch primer or something like Isopon Zinc 182 ......or etch primer followed by zinc 182 for a really good result?? The engine is 10 years old and in excellent condition, but sadly a few small patches of rust where some warranty work wasn't done properly after the first season.

Thoughts?
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Sorry I can't answer your specific question but I can tell you how I painter my Vetus engine 12 years ago. It is still looking good. I degreased with Gunk bought from a car spares shop which I then washed off with water using a garden pressurised/pumpup sprayer (this ensured minimal water ended in the bilge) then abraded all mostly using a small wire brush on a cordlessdrill. Then, and this may be of interest to you, I used "Hammerite no. 1 rust beater primer" applied by brush. I then painted with "Hammerite smooth". Have been very pleased with the result. Also, I spray my engines with WD40 all over every couple of months.

Colin. Www.solocoastalsailing.co.UK
 
The paint used by Volvo apparently doubles the value (or cost anyway) of the engine and all its parts.��
 
Plum said:
That's interesting. I used the Hammerite primer as I phoned their tech guy about painting an engine and he recommended the primer. Maybe he just wanted me to buy more product but the paint is still sticking after 12 years.

Colin. Www.solocoastalsailing.co.uk
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That is even more interesting!

According to the website "Unlike conventional paints, Hammerite can be applied directly onto metal without using a primer and undercoat first."

I have used Hammerite with and without a primer and I found that using a primer just made the coating thicker and therefore more easily chipped.


 
Etch primers are used with non-ferrous metals, particularly aluminium and galvanised steel, to provide a key for the paint. Not needed for steel.

I repainted a Bukh engine some years ago using red Hammerite smooth, which at the time was called Smoothrite. It seemed to me that it was identical with the original Bukh paint. No primer was used and it lasted very well.
 
I've degreased and wire brushed the exhaust elbow after removing it. The rest of the rusty engine bits (left in place) I simply painted with Flag rust converter (no way to get a wire brush everywhere so I just scraped off what I could get to). After that I sprayed both with TK Colourspray, Volvo Penta Green (matches the Volvo original paint and half the price). No primer on either. Elbow looks better for obvious reasons, but the primary purpose of engine paint is to prevent rust and that it seems to do.
 
Brilliant, thanks for all the suggestions and advice :)

I've got some hammerite primer so I'll use that and then spray that with the Yanmar engine paint I have
 
matt1 said:
Brilliant, thanks for all the suggestions and advice :)

I've got some hammerite primer so I'll use that and then spray that with the Yanmar engine paint I have
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Just a little suggestion based on my experiences restoring old cars and using Fertan: If you wire brush the Fertan off and re-apply, you get a little bit more of the rust out of the pitted areas. Then Hammerite with or without primer should be fine.
 
I'm planning to use Hammerite smooth dark green on my VP engine. Which looks a reasonable colour match for the Volvo Penta green. I have a slight concern about the resistance to high temperature and also the performance of the new water based product.
 
ghostlymoron said:
I'm planning to use Hammerite smooth dark green on my VP engine. Which looks a reasonable colour match for the Volvo Penta green. I have a slight concern about the resistance to high temperature and also the performance of the new water based product.
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Exactly the paint I used when I painted my Volvo engine sump about two years ago and still fine, the sump gets quite warm after a long run. For the top part of the engine I use the original Volvo supplied paint, although it cost more I prefer the match of the original paint and one spray can last a long time.
 
When I was young, I painted a lot of motorbike bits in Hammerite, not knowing that it dissolved in Petrol.
I don't know about diesel.
 
lw395 said:
When I was young, I painted a lot of motorbike bits in Hammerite, not knowing that it dissolved in Petrol.
I don't know about diesel.
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Interesting response from Hammerite (I bought some Hammerite smooth silver for my Yanmar and was alarmed by reading the above)...

Hammerite will resist splashing by petrol and diesel when fully cured but will fail if immersed in petrol or diesel or they are left on the surface for a prolonged time.

If you have any further queries, please feel free to contact me and I will be happy to help.
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Hummm does that preclude it from use? Diesel should be staying INSIDE the engine of course, however, changing the engine diesel filter, bleeding etc, will lead to diesel outside the engine and on the Hammerite. Of course you would clean it up, but still, some might remain and eat away at your paint... Would the engine enamel do a better job (at three times the price)?
 
ghostlymoron said:
I'm planning to use Hammerite smooth dark green on my VP engine. Which looks a reasonable colour match for the Volvo Penta green. I have a slight concern about the resistance to high temperature and also the performance of the new water based product.
Click to expand...

If you don't need to use Hammerite (or want to overpaint it) Ford Meadow Green (available from Halfords) is an exact match for Volvo Penta green.
 
I'm still undecided over paint. Halfords meadow green is the right colour and cheap but not temperature resistant, hammerite smooth melts with diesel and also not temp proof. Dedicated engine paints are only available in limited colours. Then there's the question of primers.........
 
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