Well, I replaced my radiator, and replaced thermostat.

Seem's all thats left is water pump or head gasket. Is there any symptoms as to why it could be either of these?

The only things I can think of that might give people a reason to believe are that it still takes a little while to warm up and it also feels like it struggles to get past 3rpm then makes a pop from the engine bay (I'm guessing it could be struggling to feed the radiator water), it then does this little pop and it runs fine.

I filled the radiator up properly - jacked up side of the car, filled it up, took cap of the breather/put it back on, let the car run with radiator cap off with funnel still in it, then turned car off, and topped the rest up.

The car is still running full boost and is lacking no power.

Does anyone have any other ideas?

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