Greetings,
I was so careful with bolt placement but in hindsight, should of checked before installing. On old pump, there was a wider bolt, new pump (from wccc) will not accommodate. I’m worried…and there was a Windsor thermostat in there…
PO must have stripped block and retapped with larger size thread. Is there room to drill the water pump hole out for clearance?
Also, you have a temp sensor threaded into the water pump hole where the ported vacuum switch goes.
Mine came back from engine rebuilder with a Windsor thermostat - and he threw away the correct Cleveland one I had in there.
Drilling can be done, yes but its all back together…oh well. The temp sensor was in there from PO, there is another just above it (likely for accessory temp gauges). Dare I admit I was thinking about JB-welding a penny over the hole…
Oh good, so I guess the bolt was LONGER rather than larger diameter. Keep in mind the alternator bracket goes there. You can get an aftermarket PVS easy enough. My local auto parts store had one.
No it was wider than hole of new pump…just went down to my shop, they will drill for me…but old pump seemed to be functioning which has me worried this was all for naught…
OK got it! PO must have drilled out your old pump. Yeah, if the old pump bearing turns smoothly and doesn’t leak, and impeller wasn’t rusted away, your old pump is probably still OK.
I decided to replace pump because i was not seeing any movement or bubbles in radiator when engine was revved. Shop already drilled it out for me, i brought them breakfast sammies. On the issue of temp sending unit…what are my options if i install vacuum port there? i need to research that, 4 ports that go to places currently unknown! Dash and accessory temp gauges both work.
Your copy of the factory shop manual has schematics for the vacuum systems. And a lot more information that you need.
New water pump is smart while you have it torn apart anyway! But if you want to keep multiple temp gauges, might as well just leave both sensors as is. The PVS switch switches the distributor vacuum advance from ported carb vacuum to manifold vacuum which speeds up the engine when it overheats. It’s not a must-have if your cooling system is working right.
Royce is right - get a shop manual if you don’t have one. SO much important stuff in there.
Ageeed, now onto stripped head on headlight bezel, have parts coming, just going to dremel off. Had to lay a penny in a glove so my fingertip could muster pushing that crusty release “detonator”. Heading to Olcott Beach. Biggest cruise of the season (sans Cat).