Just got my sump back from shot blasting.

Do i risk painting the inside with engine enamel?

or am i being thick?

Why paint it?
a) Seems like potential future trouble if you do.
b) It won't go rusty if you don't.

in my opinion

I would think NOT, you dont know how the paint would react to the oil long term, flakes of paint looming in engine would be in the back of my mind!!

Metal plus oil... why paint it ?

Wont rust because of the the oil over it

Why paint it.. Itl flake off and do your bearings.. and may go gungey with the oil and sod everything up..

ok ok

Im being stupid.

Thanks Chaps

powdercoat - yes; paint - no.

but why bother? the oil in it will prevent rust - you don't paint the inside of your block, afterall

Glyptal: This is about as much paint as I would put inside the engine. Although I have no first-hand experience with Glyptal, it has a strong following with a lot of engine builders for use on non-machined areas to create more of a non-porus surface. The thought is that it will help get the oil back into the pan faster. Here's an example of it in use on the top-end of this engine (it's the red stuff!)




[Edited on 17/3/05 by the JoKeR]

I would NEVER paint inside an engine.

If it comes loose or flakes, or disolves with the oil on it, it will get in the oil and bearings and cause extra wear, or clog oilways needed for lubrication.

Why paint inside?
1. It wont rust inside the engine - Too much oil splashing around.
2. No one will see your nice paint job anyway.

IMHO Its wasted effort, time and money.
Paint the outside if you want.. That I can understand and agree with.

I have seen engines painted inside seemed to work BUT personally I wouldn't do it I have had too many bad experiences with peeling paint in petrol tanks and jerry cans causing havoc.

I agree, don't paint it...
When I first saw the picture above of the V8 engine with the painted valley I thought it was a picture I had seen before in an engine building manual where someone had painted the inside of the engine with something like hammerite or some of the cheap gungy engine enamel. Anyway, it had all softened and flaked off in large chunks and had completely destroyed the engine due to oilway blockage.

Whilst I agree that it is sometimes a problem with V8's getting oil back to the sump quickly, usually this can be improved sufficiently by radiusing a few edges, drilling a few relief holes (in appropriate places of course) and removing the casting flash. You can also increase oil capacity in the sump or go the whole hog and dry sump it if justified.

Hope this helps,
Craig.

I might paint the lifter valley using the Glyptal, but I'd never do it without having the engine hot-tanked first to remove EVERY trace of oil. This stuff isn't a regular engine paint and has been in use long enough to get a good reputation. It isn't 100% necessary, but I don't think it's a bad idea *if done properly*.

i even would pain a engine from the outside because in the summer you don't want to give you engine a pair of extra socks?? i see it like a isolator..


TKS

As above - wouldn't paint it!

As for V8 oil return, as Craig says, plus a bit more. IIRC in Hardcastles R V8 book some people have got quite carried away removing all sand casting marks so valley is quite smooth. Quicker oil removal = better heat dispertion.

Don't paint (for reasons previously given) and it adds mass which may retain heat?

ATB

Simon

http://www.v8engines.com/engine-4.htm

About 3/4 way doen the page.

If Chris Crane oes not advise it, then Dont do it.

Yes that's the photo I was talking about earlier in the thread, I just couldn't remember where I had read it...

Craig.

i wouldn't dream of painting the inside. asking for trouble in the future.

Plus you'll hopefully never see it again

as you cant see inside an engine, why paint it!!!!!! its gonna be covered in oil anyway. while your at it, you could paint the crankshaft too.......

atb

steve

oil paintings... just ask van gogh.

quote:

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Originally posted by stephen_gusterson
you could paint the crankshaft too.......

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