Two quarts every 200 miles and no smoke and no leaks.? Where in the **** is it going? The symptoms scream head gasket but oil leaking into a pressurized cooling system is unusual. Its usually the other way.
Oh, and to top this all off we returned with two nice Canadian colds....{sniff}
It is a puzzle...
a wee bit of smoke when you let up on the throttle....just a puff
no oil in the rad fluid
very small rear main seal leak
left valve cover is leaking a bit
oil pan is leaking a bit
rev up to 2500, hold for 10 min leaves 5-6 drops of oil on the ground
Here is my guess based on what I hear and feel....it's been running on 7 cylinders. A compression check is the first order of business.
350, rear cylinder on passenger side gets tired 1st usually. #8 for you mechanic types.
Doesn't sound good, but I've seen broken rockers, flat cam lobes. How hot did it get when coolant pump let go?
Sadly I believe a lot of decent 350s were "put down" for cash as clunkers. Wonder if the previous seller had done something to mask symptoms for a bit?
Not hot at all, never overheated...it was around 11F out(and the Wp went 500 miles after it started using oil). The owner told me it burned a quart every 4-500 miles. After looking under it and seeing all the different leaks I thought maybe it was an external leak issue. I am dying to dig into it and find out where it's all going. If it needs a total re-build so be it, my neighbor just happens to be a pretty darn good engine builder. I just have to figure out how the get the thing out, engines in vans must have been installed with the use of a shoehorn.
Ive had bad PCV valves cause excess oil use, and not smoke. This is because the oil is atomized and distributed to all cylinders. But like you said, you have a miss also, check engine vacuum first, compression test and then a cylinder leakdown test. The engine comes out the front, remove grill, radiator, and front support. Sounds like anouther winter project.