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[polilara]

So, 2001 Omega 2.6 V6, when pressurizing cooling system very much cooling liquid is pouring from left where the large hose is going from radiator. This hose is tightened to metal "pipe" below left cylinder head or in head or somewhere there. I believe that the joint between this big hose and pipe is OK but the metal pipe connection between it and engine is leaking. Difficult to see there. What kind of metal part is there and can I remove the metal pipe somehow. Did not find any pics here, please help.

[Doctor Gollum]

Thermostat replacement guide...

This is a classic 'What happens if you leave out the Bastard bolt or the engine lift point?'

Accurate diagnosis will require stripping it down.

[polilara]

Thanks, now I remeber the construction. I replaced thermostat and this pipe 10 years ago. Bastard bolt is there where it should be, pipe and o-rung was renewed as well. So it have to be the hose whic is leaking... I check once again.

[polilara]

Seems I forgot to tighten that hose 10 years ago. After tightening no leakage even in 16psi.

[JamesV6CDX]

Seems I forgot to tighten that hose 10 years ago. After tightening no leakage even in 16psi.

 

[Nick W]

Seems I forgot to tighten that hose 10 years ago. After tightening no leakage even in 16psi.

That end of the hose is usually soaked in oil from a leaking cam cover gasket. Tightening the clamp might have made a failing hose temporarily seal again. The hose is GM only, and availability is only getting worse so I would suggest sourcing a new one before it becomes a problem.


As for the bastard bolt, when I replaced the head gaskets on my car I discovered that the the threaded boss it screws into was split and not holding. It had clearly been like that for years, so I supressed my should I weld and re-tap it, or replace the cylinder head thoughts and didn't refit the bolt or the lifting eye. After a couple of months, I stopped inspecting the area for coolant leaks and the car ran like that until I sold it several years later.