Gave up on fixing leaks due to corrosion pitting, while trying to re-seal a Volvo brand water pump on an 83 turbo.
<br>
Went to my shelf, where two Hepus are always kept, reached in and set the one for a B230 aside, and opened the other box.  Pulled it out and began to fit its gasket.  Turned it over several times, forward, backward, upside-down, before I realized there were not enough mounting holes!  Drat, I had two spares for B230.
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I was surprised to find FCP no longer listed a Hepu for the B21/B23 cars.  So I ordered the only one they offered - the GMB which I'd never used before.  And from another supplier, a Hepu.
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The Hepu arrived first, but I waited for the other, in order to take the opportunity to compare them before installing one.  When it did, I took photos and installed the GMB.
<br>
Starting with my side by side exam of the GMB and Hepu.<br>
<br>
<img src="./wpump734.jpg" alt=""><br>
<br>
The GMB hardware went in my junk box and I re-used the original flange
bolts from the Volvo pump.&nbsp; Hepu packs some flanged hardware, but one
bolt shy of enough.&nbsp; The gasket looks better on the Hepu, but what is
there to a hunk of paper.&nbsp; <br>

<br>
<img src="./wpump735.jpg" alt=""><br>
<br>
What is it about water pump packaging?&nbsp; I've never got one that wasn't
sticking out of a hole in the box.&nbsp; Including the blue box with Volvo
on it.<br>
<br>
<img src="./wpump736.jpg" alt=""><br>
<br>
The fan mount looks forged (?) on the GMB, machined on
the Hepu.&nbsp; The casting finish finer on the GMB.&nbsp; Both had about the
same resistance to turning the shaft in the seal.&nbsp; Hepu's top vent hole
is huge compared to GMB.<br>
<br>
<img src="./wpump737.jpg" alt=""><br>

<br>
GMB is properly equipped with "press 2 for Espa&ntilde;ol" where Hepu is
labeled for a Wasserpumpenmann.<br>
<br>
<img src="./wpump738.jpg" alt=""><br>
<br>
Casting shape is pretty close, at least if you use the ribs to find
your way to the holes like I do.<br>
<br>
<img src="./wpump739.jpg" alt=""><br>
<br>
Here the mottled "rough casting" surface distinguishes the Hepu at the
top seal.<br>
<br>
<img src="./wpump740.jpg" alt=""><br>
<br>
And at the heater pipe inlet.<br>

<br>
<img src="./wpump741.jpg" alt=""><br>
<br>
And my favorite part - the stamped impeller just looks more efficient
to me, though the bronze is pretty.<br>
<br>

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