no heat

kbenz

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I have a 96 motor stroked to a 383 in my 64 gmc. 20,000miles approx. Put a serpentine setup on about 3 months ago (along with new water pump) Motor seems to be cooling fine but I have no flow coming out of the pump for the heater. I can put a hosepipe to the return side and water flows out the output. Not sure how long its been like this I just opened the valve this past saturday to run my defrost. What y'all think?

Engine is cooling fine
 

Clb

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So do you have 2 hoses plumbed into the heater box, and is the flow routing correct?

wrong pn on pump??
look up the serp diagram and see what ya missed?
Peektures?
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kbenz

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I put a 90 model pump on it and it's working now. It had a 96 on it. has the two outlet/inlet already on it. Must be the way they plumbed them. All good now :)
 
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