i just drove from ABQ to Las Cruces sunday at 78mph all the way on cruise control with the AC on and the temp never got above 85. i think it was only in the low 90's so not real hot yet outside.
sooo, you may need to flush your system and get all the basura out of there and straighten your fins.
let us know what you find and what worked.
roberto

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1985 300SD
1998 Jetta TDI
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