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Contributor
2 Answers
- Posted on Jan 18, 2012
Re: I just rebuild my 1990 gmc 4.3 v6 engine and now my...
This could be many different issues. you could have a lower degree thermostat, if the block wasn't boiled and flushed you could have coolant restriction in the block causing less flow to the heater core,or you could have put your heater core hoses in reverse flow.
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