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Old 08-26-2010, 12:31 PM   #4
alordofchaos
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Join Date: Jan 2009
Location: Central MI
Posts: 12,857
 

2002 SC2
1998 SL2
Default Re: SL2 Coolant Issue

Quote:
Originally Posted by DonP View Post
Weak coolant can result in low boiling point, but not likely if your mechanic was any good.
Good point - The OP mentions having to add water three times on the way home.

A 2000 should have had the antifreeze changed at least once and a lot of shops use 50/50 premix these days. So the antifreeze could have become a mostly water mix at the time he took it to the shop.

Next, the mechanic does his replacements - and as we know, there is about a quart of the old left over in the heater core area. So if the mechanic filled with 50/50 premix, it is likely that the actual concentration is lower.

And we have another unknown, altitude... all the charts are based on sea-level

...
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11/2016 red 2002 5 spd SC2 151k DD
7/2010 Craigslist white 1997 SC2 project
12/2008 eBay silver 1998 SL2 5 spd 102k, now 201k+ miles

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