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2nd on the needle hitting the glass (in my case).
I figured it out by tapping the glass when it froze. The needle moved then stuck every time I tapped it. I could also hear a "pop" which sounded appropriate for plastic expansion every now and then when the car sat in the heat and then began to cool as I drove.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
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