On 4/24/04 7:53 PM, "Tracy Crook" <lors01@msn.com> wrote:

 It's possible I misunderstood the explanation but the theory of why this happened seems unlikely.  The sudden expansion of coolant would have to be incredibly fast to cause an overpressure due to not being able to get out through the overflow tube fast enough.
 
Tracy

 

I just learned it was a ¼” line; i.d about 1/8”.  Trying to squirt a pint or more through that in; what; less than a minute? That could do it.  I currently have a ¼” line on mine as an overflow from the pressure bottle.  The pressure would release from the cap (through the upper gasket) but I would lose coolant in a similar scenario.  I’m going to rework that to a 3/8”.  That will give 4 times the flow area.

 

Al

 

My overflow line is also 1/4" OD with an ID of about .15"  (actually in two parts, 1/4 ID for about 1 foot then goes to 1/4" OD for another 2 feet.)   Most of the expansion occurs during warmup which usually takes about 3 - 4 minutes.   Anything is possible I guess but I'm not planning on changing it.

Tracy