The block.

 

sucks man...hope you find the issue

 

+1

 

Good luck finding the source of the problem, even though I have my suspicions, mine was never found....blah

Not very confidence inspiring when building another motor and you don't know what came first the chicken or the egg.

 

Ok, what about this theory - I postulate this only because I propose a solution also. My belief is that localized steam pockets at the cylinder wall / head gasket / coolant channel interface may cause momentary formation of air channels between the combustion chamber and the coolant. The process essentially compresses the gasket and allows the escape of high pressure combustion gases in the absence of head or block deformation.

You guys know I like Evans NPG+. I think it may solve a small HG leak issue if the theory above is sound, for 2 reasons.

1. It is heralded for its ability to prevent localized hot spots due to nucleate boiling.
2. It does not pressurize the coolant system as much and has much less chance of forcing open a channel to the combustion chamber.

I think its worth a shot to switch out to Evans and see if the problem can be reproduced. I know some don't advocate it, but I would try it if it were my car. It may already be too late because of damage to the headgasket where it has been burned by combustion gases, but still I think there's a good chance for this to work.

 

dude changing to Evans is not going to do jack other than waste 100+ bucks and time

I wasted easily that much when mine went south

by the way the system still pressurizes with Evans coolant

 

does the heat work?

 

We will know in a few days. I will keep everyone posted:

Side note*

If anyone has a trailer that I can pull the car to Forged, give me a PM. North GA area, also, I hate the UHAUL.

 

Yep. Everything worked, I haven't cranked it since though.

 

if its a liquid, then it pressurizes in the system. There is no way around it

water cirulates very, very quickly in a coolant system and there is quite a lot of it. I can't see how 'localized hot spots' could even develop, even if the car is sitting still. As good as Evans stuff is (I'm aware of it...I don't use it, but I've heard good things), that sounds like marketing to me

 

gotcha...good look, I'm sure Sharif will get it solved for you

 

no water = no water vapor = no steam pockets Supposedly it operates at under 5 psi. It was just a thought. You tried it and it didn't work? Did you do the flush first to get rid of all the water?

The only first hand experience I can relate is that I have run the car with no clamping force on one of the main coolant hoses (under the fuel rails). It drove several hundred miles before it started dripping, slowly... No spewing at all - very hard to find. I finally found that the band clamp hadn't been tightened down at all - freely spinning around the hose.

 

it might operate at under 5 psi (ie it doesn't need pressure), but unless you run without a radiator cap...then it pressurizes, no two ways about it. Big difference between not pressurizing and not needing pressure. Like I said, marketing

The car should operate just fine with just 100% plain 'old tap water. At most, distilled water is preferred only because it is said to be free of contaminents. Aside from that, a coolant system is very, very simple, and the moment you have to start introducing additives into the equation just to get it to operate normally, you have a problem

 

Yes perhaps you are right - at this point it sounds like a band-aid fix that may just hide the underlying problem for a while longer. I fixed my original post as I misrepresented the "no pressure" vs. "low pressure".

 

if you have a headgasket leak nothing will help it, not water, not Evans not a blessing by the Pope, nothing. There is just too much pressure in the combustion chamber for anything other than an air tight seal to contain it.

yes I flushed the system before putting Evans but Evans had nothing to do with the failure so I don't blame it but after wasting all of that money I decided not to do it again

 

Evans definately works guys...absolutely no question about it. The super high boiling point, in itself, is reason enough to use it.

But like Westpak said, switching to Evan's right now, is very much like closing the barn door after the horse ran out.

 

now that we're off topic, I'll ask: what good does a super high boiling point serve in the realm of engine coolant? For engines that have a higher thermal capacity, I certainly can understand . But we've got aluminum everything...it simply can't sustain temps much above the normal range of your typical coolant/water mix in the first place

 

If you believe the theory about localized hot spots... The Evans website indicates that GM performed cylinder head temp studies and documented the utility as I recall but I looked into it well over a year ago. According to some of the marketing literature on their website (as you have coined it), a great deal of heat is absorbed through the boiling process. This occurs locally around the cylinder wall and occurs regardless of the liquid used. Because Evans has less surface tension, the vapor pockets apparently do not have the same potential for damage as water does. At least that's the marketing hype, but I would hope there is some basis in data.

I don't know what temps an aluminum block can sustain, but I would surmise that few have studied and published data in detail on the topic. Clearly the temperatures are much hotter on the combustion side than the coolant side though, so not exactly sure what you're stating. My sense is that temps are potentially far above the boiling point for either Evans or water right at the liquid/metal interface.

 

just simply what the possible benefits of coolant that allows for a higher boiling temp than a conventional mix - I can't think of why that is a desirable feature

 

I think it is just an intrinsic feature. I don't think the temperature is as relevant as the process itself since nucleate boiling is fundamental to effective heat transfer. That's my understanding anyway. I guess since the boiling point is higher, vapor will recondense sooner than for water. That would be a benefit. Can't really think of any other obvious benefits (other than not having to run higher pressure in order to raise the boiling point of water). So I guess that's 2 good reasons to raise the boiling point.

Anyway, Evans smells good. Not that I'm sniffing it, but I can tell when there's a leak from 10 ft away. Ask Sharif, I have a sensitive sense of smell...