Author Topic: cooking the engine at 200º  (Read 902 times)

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Offline mazingerzeca

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cooking the engine at 200º
« on: June 30, 2008, 06:37:14 AM »
Hello all.
I painted my honda cb125s engine with VHT Hi-Temp enamel, and it is supposed to be cooked at 200º for an hour to cure. Without it, the paint is very easy to remove with fuel or solvent.
The engine's temperature itself will cure the paint, but there are some areas that won't get that hot, like crankcases, covers and so on. The fact is that the engine is almost assembled, but I would like to cook it before using, because some fuel can drop over it before it gets hot. I've retired the plastic and rubber parts, to cook it, but will anything be affected by the cooking temperature? I mean, gaskets, bearings, oil?
Thank you.

Offline tbpmusic

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Re: cooking the engine at 200º
« Reply #1 on: June 30, 2008, 07:22:13 AM »
All of the above - you need to strip the part of all seals/gaskets/bearings - and clean it good, any oil will smoke like crazy and PO your wifey big time for trashing her stove.

I've noticed no ill effects from curing paint at temperature, even on aluminum covers, etc.
200 is not all that hot, actually. (Doesn't the VHT can say 175??)


bill
"If you can't fix it with a hammer, then it's an electrical problem"

Bill Lane
 '71 CB450 Mutant/ '75 CB200/ '81 CM200/ '71 C70M

Offline mazingerzeca

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Re: cooking the engine at 200º
« Reply #2 on: June 30, 2008, 07:27:41 AM »
Ok, I'll do it. The can says 200º F.

Offline Gordon

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Re: cooking the engine at 200º
« Reply #3 on: June 30, 2008, 07:48:31 AM »
Your engine (including the gaskets, oil and most rubber parts) gets much hotter than 200 deg.  That's not even the boiling point of water, and any water dripped onto an engine that's at normal operating temperature will instantly turn to steam. 

Offline RRRToolSolutions

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Re: cooking the engine at 200º
« Reply #4 on: June 30, 2008, 04:55:38 PM »
Gordon, you're absolutely right. I keep an eye on temps and every air-cooled bike I own goes to about 255F after a hard hour's ride. Oil temps in these air cooled bikes get to 200-210 easily. Heck, even on the water-cooled bikes, the temps run 210.

The other Gordon,

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Offline scondon

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Re: cooking the engine at 200º
« Reply #5 on: June 30, 2008, 05:06:31 PM »
Gordon, you're absolutely right. I keep an eye on temps and every air-cooled bike I own goes to about 255F after a hard hour's ride. Oil temps in these air cooled bikes get to 200-210 easily. Heck, even on the water-cooled bikes, the temps run 210.

The other Gordon,

Regards, I like bikes....

    Thanks for posting this. My leg has been burning on the exposed oil tank this Summer and when I was finally able to measure temp it read 256 degrees(after a spirited ride). Thought this was a bit too high but glad to know that your overbuilt '750 runs the same. Still gonna shop for a larger cooler ;) :)
Give me..a frame to build a bike on, and my imagination will build upon that frame