Jeff928S4

That's what I was thinking.........

The small hose coming out of the waterpump appears to be the culprit. I have wetness on the backside of the waterpump and it drips down on the power steering area. The hose itself is also wet. Thing is, I had it tightened a while back (like 2 months ago) after I found the same leak, and now it's doing it again. The mech. who tightened it said he got a quarter turn on the nut. That same nut is loose again. Could it have come loose or is it something else (bad hose, etc).

I have turned the damn nut another 1/4 turn and know I could get another 1/4 out of it, but this seems like a lot and I'm afraid of cutting into the hose. Could this happen, or is it just an old tale? I would think you could keep tightening it by hand until you can't go anymore, no?

Someone tell me to go out and tighten this damn thing - I'm just a ***** and afraid of this hose getting cut. Tell me I'm an idiot!!!

944S Boyeee

adrial

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by daytrader968:
<strong> I would avoid using Dex-cool as it isn't compatible with the typical green Prestone-type coolants and can cause sediments and deposits to form if mixed.
</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Can anybody confirm this??

daytrader968

Let me re-address that hasty statement about dexcool. There have been a few instances of dex-cool systems showing sludge and iron-oxide contamination, but gm says this is from running the coolant low on certain engines. The problem with sediments, as far as I can tell, is mostly when a vehicle has been run with a high-silicate, conventional (green) coolant and then switched to dexcool. The dexcool can apparently loosen silicate build-up and clog up a system. This really isn't a fault of dex-cool, though. Havoline says their dex-cool is compatible with conventional coolants. (There have been rumors of dexcool incompatibility with older seals, but I couldn't find anything substantive.) And, the extended life aspect of dexcool is supposedly voided when installed in a vehicle not designed for it. Also, Dexcool is on something like its 5th revision/improvement so problems may have been from earlier versions.

This article, with info from the National Automotive Radiator Service Association was interesting:
<a href="http://silverstone.fortunecity.com/ferrari/464/coolant.htm" target="_blank">http://silverstone.fortunecity.com/ferrari/464/coolant.htm</a>

This article by Patrick Bedard addresses the G-05, and other coolants:
<a href="http://www.caranddriver.com/article.asp?section_id=27&article_id=2264" target="_blank">www.caranddriver.com/article.asp?section_id=27&article_id=2264</a>

Bottom line: coolants should never be mixed. Whenever you switch coolant types, flush the system thoroughly. Other than that, any of the coolants mentioned should be fine.

JimV8

both my mechs said dex cool was ok and that pretty well all types are phospate free due to environmental issues. I was also told that coolants contain sealant additives as a matter of fact. As far as mixing my othe vehicle uses dex cool and i was told that mixing would negate the long life properties.