Tim----Let's see if we can wade thru some of your symptoms and do some
'liminatin'.
Did the engine lose oil pressure because the engine got hot? Or
vice-versa?
By all means, get a timing light. Retarded timing will cause
overheating, but it would have to be like 20 degrees BTDC or less when
all-in. Check this at around 3,000 rpm. You should be at near 30 deg.
Never saw a water pump separate to where it wouldn't pump, without
leaking (externally) all over the place.
Pull the thermostat. Be sure it isn't/wasn't in upsidedown. (Easy to do)
Replace hose, but leave disconnected at the rad. Start engine. The pump
should gush out the coolant. Collect in a pan, if you want to re-use it.
*********MOST LIKELY IT'S...the cap...
If you're OK, so far, put the rad. cap back on. BE SURE it's a good one.
A cap that won't hold pressure will allow the engine to overheat at
cruising speeds! (If in doubt, borrow one from another engine.
Run the engine WITHOUT a radiator cap in place. If the head gasket is
blown, bubbles will appear in the water in the top of the rad.
If no bubbles appear, run the engine for at least 5 minutes anyway. All
of this removing of parts in the cooling system could cause (air)
cavitation in the block. Running the engine will belch out the air.
I'm 95% certain you'll find the cause in one or more of the above. Come
back...
Dick T.
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