HELP - NEED TO GET THIS ENGINE PAINTED

[TCalYen]

Hi Everyone…

There is so much fluff on the internet… it’s annoying.

I’m ready to paint the engine on my Suzuki m109r while it’s on the bike and I’m very nervous about what paint to use.

The paint will be satin black and will not be the super high temp paint used on exhaust applications. Paint will be in the 5-600 temperature range.

Does anyone have any recent experience with any of these aerosol (spray can) engine paints?

Any help and suggestions appreciated…!
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Thanks!

TCalYen

[stinkwheel]

Simonize engine enamel is very forgiving. As is plastikote bbq paint.

Be aware both remain fairly soft until they've had a few heat cycles to cure them properly.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Bhud]

I had a go at this when rebuilding an engine last year. I suggest reading the TDS sheet carefully, because some of these engine enamel/paints require the part to be baked, for the paint to adhere properly. And the petrol resistance isn't that great (I used Hycote).

[MCN]

If the parts are aluminium, it will need an acid etch primer.

It will refuse to stick if you prime untreated aluminium.

And make sure all the wee dings are removed before painting.

Last engine I painted was my BSA C12. But that's has a cast iron block and head.
The paint is still on it.

Halfords Engine enamel black.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[TCalYen]

Thanks for the input. The engine is aluminum but I did not take it down to bare metal…

Another question is should I use a primer? I won’t be able to sand if I do because everything is taped up and cleaning after sanding the primer would likely ruin the tape adhesion.

Should I prime and just not sand… then paint?
____________________
Thanks!

TCalYen

[MCN]

[stinkwheel]

Both Simonize and plastikote BBQ go onto bare alloy fine without primer and stays put. Both do need to get hot to properly cure.

A hot running iquid cooled engine seems fine for curing the plastikote BBQ to cure, did Mrs stinkwheels CB500 crankcase covers with it onto bare alloy. This it the clutch cover three years later. Rubbed by her boot but still good.
https://lh3.googleusercontent.com/pw/AP1GczMZhHDHFT-EneaouZ89LabXT_AI7wmc5TGKVlKRcx7Kvj5VFjMXTNI-HPCerbpuxuXWxgTzIBWf9yjvs-KdJlt6KPzTPJlYGtOBMNwasKzFPXRfOpiO5s4FdfrxJ6K9QrfHrmN4rvhu7BmPGNZEmzDJ=w1160-h870-s-no

Did my whole Minsk 125 engine with the simonize engine enamel onto bare alloy. High tem on the crankcase, VHT on the barrel and head. I did bake these off in an oven though.
https://lh3.googleusercontent.com/pw/AP1GczNN-JJUC33eEukxSQ8ar4rntaIi12vI2p9k-qVcDmtBaSlXPYyK38e1-fv0aIdBvK161LkRj9h0NSgJ317xwgXAThBTL5sMSgXSd2UWxAfmYof63j6T0i6NhvJgEKfQjRKsvEm6ois9O75Cey_3dZdj=w1547-h870-s-no

I did the crankcase covers on my VFR with tractol machine enamel direct onto bare alloy.
Before:
https://lh3.googleusercontent.com/pw/AP1GczPPoYRZFSRYJoUg6FRJ7CxR7WVF2zWcjIxtUeq94ch1wquYhuzE-uutsfywJTZBP2J3nKFA4Xe8q5VrG79cSR4O0dWPrDo1DnSgSOr-ZvzP_eU9E2imjURfIeRMjSx6JSJeuY5wZ1rXDb7IhzSktoFe=w1547-h870-s-no

After (the stuff on the inspection cover is ceramic grease from assembly).
https://lh3.googleusercontent.com/pw/AP1GczNU-xvXq5Z9xfPC9yi5TzQ7R-mjjojY8EjjxUE2aQwNQDNySQArr_GKoOuft2iX8UjbcqBNb5sUBxNfGedwQQVITjYCrzuBXddZgTW-8gWxeZw6h0hQMaJzR9xXA4-oTZTg9aHCra9dG7mOLU3jCchI=w1547-h870-s-no

All finishes holding up well.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[WD Forte]

I used satin silver radiator paint from B&Q on a CX engine and it stood up pretty damn well for a few years until I sold the bike.
I've not known a liquid cooled engine case to get much over 100C-212F if that. but it's possible the areas around the exhaust headers may get locally hotter.
Air cooled? dunno,
____________________
bikers smell of wee

[A100man]

[WD Forte]

Another tip.
It all looks great at first and if you want to keep it that way
don't use the bike.
____________________
bikers smell of wee

[MCN]

[MCN]

You may be OK to.paint on aluminium but the surface oxidises as soon as you stop sanding it.
The oxide is not stable.
I etch before prime as that means you can't blame your prep for poor results.
95% of a good result is due to good prep.

This applies to secks too.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[stinkwheel]

[Bhud]

[WD Forte]

I wasnt at skool the day they did alchemy

Im aware of the duller reactive layer on ally but what is that
white powdery shite that seems to eat it away?
You often see it lifting Powder coating,paint and on long neglected casings

why do dat happen?
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bikers smell of wee

[A100man]

[TCalYen]

Thanks everyone! Well I went ahead and painted it last night using Raptor 1k and am not happy with the color… I hope it gets duller because it was supposed to be satin. Should have went with PS1 which is said to match the Suzuki satin engine casings well. I’ll live with it though.

I’m trying to add a pic but it’s not working for some reason.

My bike is a liquid cooled m109r
____________________
Thanks!

TCalYen

[stinkwheel]

There are different forms of aluminium oxide and the presence of salt solution makes a different crystaline structure which isn't well adhered. It's been a long time since I studied this but I believe chloride spectator ions are to blame.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[A100man]

[WD Forte]

Oh!

Aah

Umm..........................

I do believe that's 1999 Rover 600
I wonder if it's the 1850 or the 2.3
the better ones had the Honda Accord engines of course...
____________________
bikers smell of wee

[A100man]

[Islander]

[Nobby the Bastard]

[Bhud]

Ah, repainting the engine makes sense then. As the weather improves, the choice is to ride around on that thing in public, or fuck around with it at home where nobody can see you.