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Left head too hot
This thing is running 224-230 degrees on the driver's side and 194-204 on the pass side, at T-stat Hsg and radiator inlet. Temp at sender on head matches gauge(tested w/pyrometer) Temp sensor & sender replaced, new 160 deg. thermostat, OE water pump & fan clut... Login to read more. 
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109 Replies Received
109 Replies Received
| Engine | 5.7 L |
| Trans | 3-speed Automatic (Electronic) |
Vehicle Data
1989 GMC R2500 Suburban 5.7L
| Engine | 5.7 L |
| Trans | 3-speed Automatic (Electronic) |
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