I recently had the motor in my 99 cobra rebuilt due to a rod knock caused by the previous owner. I drove the car really easy about the first week, and then, a little after that i decided I wanted to see what she had, well I turned T/C off and I was gonna do a 180, of course I had no problem, but when I pulled back off the road my car died. It started steaming from the engine, and my heart dropped, I looked at the temp gauge and it was fine, so I looked under the hood and saw that it was the hose running from the radiator through the firewall, it had slipped off a little, and that stopped the steaming, and the k&n cone filter had come loose from the intake, so I tightened it back up. After a while the low coolant light came on, so I put some water in it til I could get some coolant. Later that night a 95 cobra wanted to run em, I beat him once, and then again only not as bad because of the burning up out of the hole, after the race I noticed there was a knock in the motor. It doesnt sound like a rod at all, and the sound seems to me like is coming from the passenger side head almost at the firewall, most people have told me it's probably a lifter. If you have any other opinions, please let me know, and if you think the same, what do you think the repair cost would come around to? Thanks Alot.