Quote:
Originally Posted by olddog
Undy, do not underestimate the dangers of nitrogen. It kills people every year. I think more than any other gas in industry. It is not the nitrogen that kills you. It is the absence of oxygen. I said one lung full and your dead. It takes about a half dozen breaths to replace what is in your lungs. Loss of conciseness occurs at about 3 breaths with little to no warning.
Don't use it in a closet obviously. Open areas with moving air are safe unless the volume is high. We have excess flow valves that shut the line if the flow exceeds a maximum. Regulator can fail and dump a bottle quickly.
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I'm not worried about the Nitrogen as it couldn't get past all the Phosgene, hydrogen sulfide, refrigerants and carbon monoxide that already fills my lungs...
I remember to old days I used to do refrigeration "York System flushes" on Navy ships. We'd go into confined spaces and get hit with a loss of oxygen as leaking refrigerants displaced the air in the room (refer equipment decks). We were told to stay down till just before death (seriously) and use the last drop of energy to climb out before loss of consiouness overtook us.. We did it and thought nothing of it at the time. Oh the sins of our youth...
Quote:
Originally Posted by Excaliber
...being one of the resident internet expert's I thought I better get in on this thread as well. 
Don't have a clue, you've covered the bases nicely.
I did like Rick's idea of under water testing for bubbles, I've had good luck with that finding very small leaks in tires. I don't currently have any freon or gas type leak detection tools, so a water bath would have to do for me.
Taste of glycol is a key element in this exercise, very telling.
On removing the heads: Head bolts no problem, HEADER bolts are a PITA however! |
I think we all have a little internet expert in us, like it or not.
I just talked to Keith and he suggests going forward with pressure testing the rest of the motor. He said he pressure tests all Pond blocks prior to assembly and machining. That gave me a bit of a warm fuzzy. He really didn't have any revelations other than what's been dicussed here already.
Quote:
Originally Posted by ERA Chas
Dave,
Just grasping again but this thought occurred:
A. Started after the intake change-right?
B. Goo only in VC's-right?
Guessing that water is entraining into the oil feed at the rocker pedestals in each head. That would contaminate only the valve cover area. Don't know where such water could come from and don't know why the goo doesn't go down the corner head drains and contaminate the valley/crankcase areas. You don't oil through the pushrods right?
Just trying to get someone smarter than me to think away from all the gasket/head/porosity/testing stuff beat to death here. You've covered all that in my view.
If you haven't already-get KC to listen and offer a thought or two. I KNOW he's not responsible for this problem.
Getting a headache  . |
A= yes
B= yes
Sad to say, not sure on the pushrod oiling, it's a hydraulic roller, Ersons and Smith Bros pushrods..
I feel your pain, I've had a headache too ( might be from tasting all that Glycol and repeatedly huffing Nitrogen)
Quote:
Originally Posted by Ronbo
One thought did occur to me, have the cap pressure tested.
Cylinder heads been re-torqued lately? (do the free stuff first) 
All else fails maybe switch to a waterless coolant, this way you could run a 0psi coolant system.
Reason I mentioned the rear ports is it's an ideal place for steam to collect with no coolant flow to wash it away.
I feel for you on this one, the cause ain't exactly jumpin out at ya. |
The cap seems to be working OK although I've not pressure tested it.
I've stayed away from the waterless coolant (Evans etc) as it doesn't have near the heat rejection capability of water/glycol. I don't feel I have enough redundancy in my cooling system to give up any capacity. I did look into it a year or so ago.
I'll look more at those rear ports in the second round this weekend.
The saga continues...