Engine internal paint
Discussion
Exactly not only improves flow to the sump, but also stops the oil clogging up with soot and silt in the casting of the blog and keeps it clean and hence allowing the engine to run cleaner and smoother.
see not so stupid! and what is gonna chip and flake the paint? if nothing should ever touch inside the engine.
see not so stupid! and what is gonna chip and flake the paint? if nothing should ever touch inside the engine.
mattius said:
and what is gonna chip and flake the paint? if nothing should ever touch inside the engine.
Er, the oil? it would have to be a damn good paint job so as NOT to allow oil to seep in underneath it. You will have lots of unpainted edges such as around the base of the cylinder which can be a nice place for the oil to lift and start its way in behind the paint.Maybe cleaning the inside of the casting with a dremel to take off any roughness would aid oilflow better than paint.
lol have you ever seen inside a cast iron block, it would take at least 3 months constant to smooth it, then you have the problem that the metal is still porus.
This is a triumph engine so hence why im doing it as told above.
The oil will only get under the paint if the adhesion isnt good, with a modern oil proof enamel it should be fine.
This is a triumph engine so hence why im doing it as told above.
The oil will only get under the paint if the adhesion isnt good, with a modern oil proof enamel it should be fine.
I'd never do it. The risks of paint clogging a filter or gallery outweigh the potential oil drainback gains. If the oil drain backs are so poor in the first place the engine would never run for more then a few miles. Better to smooth and blend the casing even if it does take longer to do. Lets not forget we aren't revving to 9k plus and if we were we could fit head restrictors as an option.
My Triumph blocks were all painted at the factory. When I had a block caustic dipped, off came the paint. I used Hermetite engine enamel and that seemed OK.
I would avoid all other types of paint. I'd also use an extremely thin coating, you do not want it to crack or peel, the consequences are not good.
I would avoid all other types of paint. I'd also use an extremely thin coating, you do not want it to crack or peel, the consequences are not good.
mattius said:
Right have anyone painted the internal of the engine? what do you use? i ask as i used an engine enamel by por15 and am no worried it aint up to the job
The proper stuff is called Glyptal - which is armature enamel noted above.http://www.frost.co.uk/item_Detail.asp?productID=8...
Note that it says applied after sand blasting - as you dont want any trace of oil. Used on V8's to allow the oil to drain back down the V easier.
http://www.hotrodders.com/forum/paitning-your-inne...
Edited by eliot on Thursday 31st January 09:39
You want to keep sand as far away from an engine as possible.
I would clean up casting lines, chemically clean the block, use a wire brush to get all the old junk out of it, wash with Jizer, then use a light coat of paint, and leave it at that.
Introducing sand into the mix will get it in galleries where it can't be got out of, until it decides of it's own accord to trash all the bearings.
I would clean up casting lines, chemically clean the block, use a wire brush to get all the old junk out of it, wash with Jizer, then use a light coat of paint, and leave it at that.
Introducing sand into the mix will get it in galleries where it can't be got out of, until it decides of it's own accord to trash all the bearings.
It just strikes me as one of those things that might help drag one or so horsepower out of an engine back in the day when they were a current race series and rules were tight but whats the point now, there are more efficient ways of pulling that power out without the risk of paint flaking and trashing the engine. Just seems an unnecessary risk.
wildoliver said:
It just strikes me as one of those things that might help drag one or so horsepower out of an engine back in the day when they were a current race series and rules were tight but whats the point now, there are more efficient ways of pulling that power out without the risk of paint flaking and trashing the engine. Just seems an unnecessary risk.
its not allways about maiking more power. some people do it to increase reliability. obviously if oil is getting around the engine better and staying in a better condition then its going to help the engine last.Chris.
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