Just wondering because I'm at the beginning of coolant seal failure and my main problem is that the Coolant system is building too much pressure via combustion leak into the cooling system thus bypassing the AST cap and dumping out my coolant through the overflow tank. However, the leak is still small enough to where once about a cup of coolant is spit out the cooling system can run for a few days without builidng this extra pressure. Theoretically. if I ran pressureless Evans setup....then I could run my engine til the seals are so bad that it floods the combustion chamber and plugs which could take a long time. Last time my engine went out I ran it for about 6 months til the seals got so bad that it wouldn't even start. At the moment I don't even have a trace of coolant on my spark plugs. Wadya think bout dat ?

 

BTW, if I decide to test out this idea what cap would I use for my Pettit AST to make it Pressureless? Also, is the stock filler neck cap considered 0 pressure ? It should be because it's not a spring loaded cap. Thanks guys

 

Car still runs perfect temperature and pulls hard as ever. Just have problem loosing coolant due to high pressure from combustion gas leak into cooling system and spitting out coolant through overflow tank.

 

Don't really know enough to comment on what you're trying to do, but the stock cap has a pressure rating. Look on the label. 0.7 bar or something, I don't remember.
~Tom

 

Anyone ? I will call Rob at Pineapple tomm. to see what he thinks. If this works...this would eliminate the need to drive around with a bottle of coolant to keep topping off coolant everytime it blows out of the overflow tank. Of course, this is not a solution but rather it will Prolong the inevitable Rebuild. This would be similar to the "block seal" trick that some use. However it won't require dumping that gunk into your coolant system and possibly screwing other things up in the process.

 

Here is my opinion.
Now running with zero pressusre that would help keep water from being pumped/squeezed into the combustion chamber, however due to the combustion leak wouldnt that try to create pressure in the coolant system thus causing the coolant to still overflow? Now by using a zero pressure cap, that means as combustion leaks into the cooling system it will escape but where air escapes so will coolant.

 

Good point indeed. BUT, without the coolant leak and combustion gasses...how does the coolant system build pressure in the first place?? Is pressure caused only by the cap on the AST ? Oh well....I guess I'll have the engine yanked as planned.

 

You've already have a problem. Think about it, you've got really high pressures (in the 1000's) in the combustion chamber and ~13psi or whatever in the cooling system. Which way are the combustion gases gonna flow if there is a leak? 0 psi or 13psi in the cooling system the gases are gonna flow from the combustion chamber into the cooling system. Changing to the Evans isn't going to help.

Jeff

 

True.....okay...Kill this post now Time for rebuild as planned. Thanks guys for killing my last ditch effort to delay the inevitable...jk.

 

I believe its created by the temp rise in the coolant?
Gosh im starting to regret cheating my way through school!! I must of missed that day.

 

Alright, so how is pressure created?? If it's through temp. the evans coolant will still rise in temp just as regular coolant. It's got to be created by the caps. Man...regardless the combustion leak will still create pressure regardless.

 

Water expands and Evans dont, from what Ive gathered

 

What about "Barsleak"?? Works sometimes..

 

Evans expands. Go to pineappleracing and see what they have to say about it.