Still working on this...thank god my dad's retired.
I took off the rad and the water pump housing when I replaced the pump. I put everything back and fired the car up to see if it worked. When I revved it, coolant started pouring out the bottom of the housing. Did I just not tighten everything down enough? Or do I need some kind of sealer between the housing and the block? I also don't have a gauge for the tension on the belts, how important is that?

As an aside, I decided I would clean the engine bay while I was at it because my throttle linkage was sticking a little. No big deal, just idled a little high. Now I can't shut the car off. I have to rev it and then push that thing on the throttle linkage to shut it. Can I take each piece of the linkage off, clean it, and regrease it (what kind of grease)?
Thanks

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1984 300TD Turbo 156Kmi
"He who seeks knowledge begins with humbleness" - Buju Banton