clanger
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| posted on 20/1/13 at 09:35 AM |
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Plastic cam cover melting temperature??
Morning all,
Want to do a wrinkle finish on my plastic Duratec cam cover and the PJ1 or VHT paint I want has got to be baked at 93degC for 20mins 
There are other paints on the market, but I've used the PJ1 and VHT stuff in the past and its top quality...
A bit concerned I might end up with big blob of plastic at the bottom of the oven.......Anyone any experience of the type of temperatures these things
can handle??
I suppose they get a bit of radiated heat from the exahust manifold when not in use, but not a full on bake ?? Will also have to keep an eye on
warpage issues and make sure its nice and flat I suppose?
Alloy covers are available, but they seem very few and far between on the second hand market..........aftermarket fancy ones are £££'s 
Cheers
[Edited on 20/1/13 by clanger]
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big_wasa
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| posted on 20/1/13 at 09:46 AM |
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My zetec gets to 105 deg on the coolant before the fan kicks in. Should be fine.
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HowardB
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| posted on 20/1/13 at 09:53 AM |
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there are a range of polymers used in automotive applications they have melting points from 150 to 300C, a quick look on the part should find a
material code, say pps, ppe, pa6 etc. The melting point can be found, however the real issue is the softening point, that tells you when the material
can no longer self support (in simple terms)
So a pa6 part will melt at 225C, but may well need to be supported at 100C.
I would firstly determine the material and post that here,..
Hth 
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again  and goes zoom)
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clanger
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| posted on 20/1/13 at 10:00 AM |
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just the type of info I was after, I thought it might go all floppy at first
cheers, will do
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MikeRJ
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| posted on 20/1/13 at 10:07 AM |
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The other issue is whether the wrinkle paint will actually stick to the plastic. It seems to have a tough enough job sticking to alloy cam covers as
Honda have repeatedly proved through several generations of engines!
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dave r
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| posted on 20/1/13 at 10:21 AM |
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so what sort of money do alloy ones go for then ?
I'd love to give my imaginary friend a great big hug,
but this jacket makes it impossible.
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clanger
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| posted on 20/1/13 at 10:39 AM |
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quote:
Originally posted by dave r
so what sort of money do alloy ones go for then ?
dunno, seems they don't show up very often. breakers are understandably unwilling to take one off and engine for you. will keep my eyes peeled
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GOJO
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| posted on 20/1/13 at 11:39 AM |
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Have you considered water dip for a finish also called hydro dip or similar theres a couple of places in the uk doing it.
http://www.wickedcoatings.co.uk/
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