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Commadore vt 6 cylinder

Hi, people,
I have a Commodore that is causing me a load of trouble since I bought. It overheats all the time. I have had the engine checked, I have had a new thermostat installed, new hoses, had it bled, and yet it is still overheating. I got stuck in traffic because of, and when it overheats like to the absolute hot level the fan won't turn off. I have had it at the Mechanics three times and now it's going back in morning, but I am starting to dought him now. Can someone please tell me what is wrong with it????????

Thanks, Karlsie.

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They are known for the intake manifold gaskets to fail, but this doesn't usually cause major overheating. Without looking at it it could be a failed headgasket or blocked radiator. Get the cooling system pressure tested. Mechanic should have identified the problem the first time you took it there.

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Check water pump is doing it's job, if not replace, then new radiator would be the next step along with a full flush of the cooling system, of course you may have a blown head gasket which any half decent mechanic would check for.
I recently had to fit new radiators to 2 VZ's.

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After switching off and all is safe to place your hand on the radiator grilles, feel if any area is cold, this will reveal a blocked radiator. As mentioned above the mechanic should have already checked head gasket by doing compression test etc, I would search for some one else mate.

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Cheers, Lindsay.

4305

I have a VS Ute (same engine) and I had a huge amount of crap in the cooling system (brown rusty sludge), so a thorough radiator flush won't hurt. The reality is a cooling system is pretty simple. It will only be a one of a few things. As above, water pump would be a prime suspect if it is overheating at idle, stuck in traffic. That or a partial blockage which is restricting the flow of coolant.

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most common causes for this is water pump or inlet gasket I do quite a few inlet gaskets on these motors

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