No RockAuto in Greece. We have the French Autodoc and a couple of others. Autodoc did have the exact tank in stock but they couldn't ship it because of its size.
I did replace just the pump out of necessity. The fuel sender was destroyed by the black tar 10 year old gas converted to. The market didn't have any OEM replacements for the assembly so I just cleaned it and dropped a new pump inside. The sender was beyond repair so I just threw it away and figured I'd just have to make due without one.
However, after a lot of research, I figured out that a Chinese company makes replacement pump assemblies for my Corsa B, just for ones that have single-point injection systems.
The actual pump won't work because of that (it won't produce enough pressure for my four-point injection system). But the sender and assembly should be compatible. It should be just a case of: swap 1 bar pump with my current 3 bar pump to the Chinese assembly and hopefully I have a fuel gauge again.
Car parts can be a nightmare. The fuel filter I installed along with the pump had to be changed five times from the place I bought it from, and it STILL didn't fit! It just kind of popped off while the engine was running. That could have, er, been bad if the fuel sprayed on the hot exhaust. I ended up having to zip tie it into place because I was done playing part lottery.
Haha fuel going everywhere is kind of scary.
Dude, lack of OEM sucks. Or sometimes it's labelled as OEM but it still isn't really. There's sort of a helpless shrug from the vendor when it comes to basic compatibility as well as machining quality (e.g. if I had to buy new heads, are they good out of the box? Apparently not). And you only really find out when when you're putting that damn thing in/on, or worse, when you start the motor. Doesn't help that it's probably not a job you do every Tuesday, so the question of "Am I the problem?" comes up too.
I'm guessing you have a blown head gasket if you're doing all that.
Yes, and I'm hoping it ends there. It's my first head gasket job, which makes me wish it had been a simple four cylinder car.
I do take my cars in to the shop annually for checkup, but it never occurred to them or me to change the coolant. I think the thing had the same coolant in it for 15+ years

. Coolant leak + coolant in exhaust and drastic loss of compression in cylinders 5 and 6, but they were all about to go. No sign of milky oil though.
So I've done the water pump, a friend machined down the heads, I replaced the expansion plugs in the head for good luck, and I've just reinstalled said heads yesterday (had to pay a premium for the local auto supply to ship me the correct bolts but I need to get this done). Will have to run some cleaner through the coolant system afterwards and hope for the best.
I'm not taking the whole engine out and completely disassembling for crud. Likewise I'm not bother with the timing chain cover and oil pan. If it's that messed up, I'm
out. Just cleaning gasket surfaces has made me want to run around the Overlook Hotel with an axe.
If I had a lot to lose, I wouldn't let Stuart near it, but it's a 1997 American car: sort of DNR in my mind.