So I'm in the process of trying to diagnose a problem with my TL2300. I started to loose power and heard an increase in engine noise after about 2 hours of bush hogging. There was brown foam residue in the radiator and the coolant was brown and kinda oily. I figure it's a blown head gasket and have started tearing the tractor down. So far it seems I have torn half the tractor apart just to get to the point where I can access the top of the engine. Anyone else done this and have any advice or recommendations? 3 cylinder diesel 4 wheel drive.