Lots of great threads here on coolant part replacement, but here's my problem. I replaced all the plastic pieces and gaskets in 2016, 20k kms (12k mi) ago, 2005 V8. I have a leak at the joint between the thermostat housing connector (the angled tube that goes to the block), p/n 2W9Z-9N499-A, and the thermostat housing, p/n 3W4Z-8548-AD. These are the Tasca item names. These are the two parts that just press together and rely on a wide gasket, and the fact each is individually bolted to the block, to keep them sealed. Is there any way to keep this joint sealed (yes, I lubricated the gasket seal with coolant when assembling). Can it be sealed better? What about disassembling and using a sealant of some sort? Just seems like this joint can't take the pressure. I noticed there's what looks like provisions for a spring-loaded wire clamp or something formed into both pieces. I'm just miffed at having to buy plastic parts and seals again after such low usage and it seems like such a weak spot. Any advice/suggestions? Links to the pieces I'm talking about: OEM Ford Radiator-Thermostat Housing Connector 2W9Z9N499AC | TascaParts.com Thermostat Housing - Ford (3W4Z-8548-AD) | Tasca Auto Parts Thanks. EDIT: Just to be clear, all parts were OEM.