Hi, I recently brought a 1990 Toyota MR2 SW20 N/A for $6k, 173,000kms on the clock, targa, full alpine stereo. When I brought it had a minor problem, possibly stem seals but worst case recon head. Thought for $6k... normally MR2's sell for $8k+ the money should cover the recon head and I'll be out on top. Unfortunately, I found out that it loses oil somehow somewhere. It's not dripping to the floor but I can't see blue smoke to see if it's burning and the coolant colour seems normal. The thing is I'm losing 1L of oil per week! So I've taken it to a reconditioning workshop and got a CO2 test done and came back as a blown head, and got a Compression Test done and came out with 150, 150, 150, 145 which is in the specs, so I shouldn't worn piston rings etc. Now I've taken my car to RAC and they can tell it's losing a lot of oil but they don't know where. They've quoted me $6600 for full rebuild or $3300 for head rebuild. Guy said he doesn't know if the head will fix the oil aswell or if it's a bottom end problem and would need a full rebuild. They can't tell until they open up the engine. The other course I'm thinking is putting in a replacement engine, I found this, asking $1500. Apparently the head gasket leak isn't major, just gets hot quickly. I was thinking taking the Mild Reconditioned head of the spare motor and putting it on the other motor. I'll have a test drive of the car and might get RAC to have a look, he said I could do a compression test on it etc. It just sounds a little weird to me. But it won't hurt to have a look. What you guys think?