Chevrolet 70 Series 1970, Service Manual

Page: 487 / 841

ENGINE COOLING SYSTEM 6K-20
Figure 3 1 —W ater Pump M ou n tin g (6-71 Engine) (Typical)
W ater Pump Rem oval
R efe r to fig u re s 31 and 32 and rem ove the
pump a s follows:
1. Open the d rain cock in the pump body and
d ra in cooling sy stem .
2. Loosen the hose clam ps and fo rce the w ater
pump in let hose against the pump inlet elbow.
3. Rem ove the two bolts and w a sh e rs that
a ttac h the pump outlet flange to the cylinder block.
Figure 3 3 —Pressing W ater Pump Shaft from Im peller
4. Rem ove the th re e bolt and s e a l a sse m b lies
that attach th e pump to the blow er assem b ly , then
u se sp ecial tool (J-4242) to rem ove the in n er cap
screw (re fe r to fig. 32).
5. W ithdraw the pump and rem ove the gasket
and th e outlet flange with packing rin g.
Figure 3 2 —Loosening Inner W ater Pump-To-Blower
A tta ching Bolt w ith Special Tool (J-4242)
Figure 34 —Removing W ater Pump Drive C oupling
from Shaft w ith Special Tool (J-1930)
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL