[Vwdiesel] A tale of two coolants or my life and times as a glycol-holic!Shawn Wright swright at zuiko.sls.bc.ca
Fri Mar 26 09:29:31 EST 2004
On 26 Mar 2004 at 7:57, Hayden Chasteen <dieseltdi at earthlink.net> wrote: > Ever since I put my Caddy back on the road, I have been concerned with > the temperature at which it runs. Not only was the water temp too high > as far as I was concerned but also the oil temp. At times water temps > would rise to just 1 white notch below the red and oil temps would > reach 220+ degrees F. Part of this heating I attributed to the turbo > engine running hotter but it was too hot for me. Now you have to > understand that I have replaced the water pump, the thermostat (yes I > checked it in hot water before I installed it and I drilled two small > relief holes), the radiator (with a genuine copper one with metal > intakes), most of the hoses, put in a two speed fan and fan switch > (with after run) and yet the "heating episodes" continued. I > mentioned this in frustration to my son (the "professional" > mechanic...thank God he has a job and his own apartment now!) and he > asked me which coolant I was using - red or green. Well, being the > convenience enthusiast that I am, I had decided to use the red coolant > so that I didn't have to change it so often. "Well", he almost > sarcastically says, "that is your problem. for what ever reason, early > water cooled VWs don't seem to cool as well with the red. My Scirocco > and formerly owned Corrado both ran hot with red coolant. Switch back > to green and your heating problem will go away!" Well not being one to > question the word of a professional, I flushed the system AGAIN and > used the green coolant. Guess what? The car now runs at the correct > temp, it never goes above the first mark above the middle and doesn't > even reach that unless I really stand on it for a while. And the oil > temps that used to reach 220+ now rarely go above 190! SOOOO anyone > else noticed this strange state of events? As I pondered how my son > could actually be so smart, I remembered that when I put the 1.9TD in > to my old 85 Jetta, I used the red coolant in it also and it ran hotter > that I liked. I just put it off at that time to the larger turbo > charged engine. Any chemists in the group could maybe explain this? > BTW, I used the same mixture of green and red with water in the > radiators (50/50 or very close) so the variable is only red verses > green. Talk amongst yourselves and make comment. At this point I am > baffled. Hayden Interesting... my old TD used to run quite hot also, even after I replaced the rad with the larger A/C version. I just assumed it had more to do with the worn int shaft bearings and resulting low oil pressure causing more friction under load. I never even considered the coolant could have a role, but I did start using orange stuff about 5 years ago, after having excellent results with it in my '88 Westy 2.1L wbx. The waterboxer engine does well with it - I've never seen the gauge rise about 2/3, even on long slow hill climbs. -- Shawn Wright http://Zuiko.sls.bc.ca/swright ~This message sent by Pegasus Mail, the safe E-Mail alternative~ "Friends don't let friends use Outlook"
More information about the Vwdiesel mailing list