My 2000 Caravan SE 3.3 FWD has only 85K but it has problems. I am trying to figure out my best approach to fixing or dumping it. Problems:

1. Oil leaking when engine running between timing cover and block to left of oil pressure switch.
   • Would a blown crank seal blow out the timing cover gasket? Are crank seals a problem?
   • If I have this done, should I get the crank seal replaced even if it's not leaking?
   • Ditto on the timing belt? I assume yes, but it seems worth asking.
2. Losing power steering fluid. It drains in 1-2 weeks. (I think it drained once when I'd let the van sit unused for 2 weeks, but I have not verified this.) I have not searched for this leak, but my favorite mech figures the chances good it's caused by the bottom of the pump having rotted (he says they replace many more pumps than hoses).
3. The heater core started misting last week, fogging my windshield.
   • My favorite mechanic gave me a sealant (Alumaseal). "Siphon the top 2-3 inches of the radiator, add the flakes after starting the engine, and drive for at least 30 minutes."

Questions:

1. How many hours for the timing cover, main seal?
2. How many hours for the PS pump? Does it save time to have both done at the same time?
3. Are there other things I should be considering? What have I missed?

Background: I bought the van 2 years ago with 73K. The limited paperwork supported the low mileage, the condition seemed appropriate (except the vinyl on the sides of all seats had cracking, but tops good). I've had a T&C AWD and a 1996 Caravan. I once owned & ran a Audi/VW repair shop, but I wasn't a tech. I replaced the front suspension in this van (Monroe struts, both axles, and one wheel hub) and that was difficult for me. I'm 71 and I will have someone else do this work;

 

While it's apart, do the timing chain and crank seal. Could be a bad pump, not sure if this is common, but I've never had one rot out up here, so I would guess it's not the issue. Heater core is a pricey thing to replace, but replacement is really the only true fix.

Hate to say this, but if your mechanic thinks the 3.3L is timing belt and suggests using radiator gunk, find a new mechanic. 3.3Ls are timing chain. Running radiator gunk is a good way to end up with other issues like: Clogged heater core, clogged cooling ports leading to blown head gaskets/warped heads, etc. Any mechanic who suggests this stuff, I run away from as fast as I can. Next he'll be telling you that you can run any trans fluid in your trans, which you can, assuming you want to replace a trans.