Re: Radiator water flow
Posted by Owen_Dyneto On 2017/12/5 13:49:25
The impeller-to-pump body clearance should be somewhere between 0.010" and 0.030". If you have more than 0.060" clearance I think it's a safe assumption that your pump's volumetric capacity has been severely curtained, perhaps by 50%, maybe even more.
For whatever it's worth here's a pix from my spare 11th Series water pump. The impeller is the original cast steel and it's just painted with RustOleum as it's in long term storage. The clearance at the outer impeller tips is about 0.037" and at the inner root just a tad less than 0.020".
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For whatever it's worth here's a pix from my spare 11th Series water pump. The impeller is the original cast steel and it's just painted with RustOleum as it's in long term storage. The clearance at the outer impeller tips is about 0.037" and at the inner root just a tad less than 0.020".
Attach file:
(242.11 KB)
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