water pump

[tonys stag]

took stag for run today to try out the new wind deflector. nice improvement. when sitting still, the electric fan kicked in, and it sounded like the fanbelt was slipping.[new fanbelt] the temp went up above its normal position. re-adjusted fanbelt when got back. went for another trip, car run hot ,and it continued to shriek.had this before on other cars, turned out to be water pump, is this what can happen on stag

[V Mad]

No, the stag does not have a fan belt as such, and the water pump is not belt driven, it is driven by internal gears/chains.

When the electric fan starts, this puts an electrical load on the alternator which in turn mechanically loads the alternator pulley; in this situation the belt can slip casing a screeching noise. The electric fan may then run slower.

If the engine is overheating and there is a screeching noise your viscous coupling may have failed (if still fitted); this is a common problem.

[martin]

Hi Tony, further to what Chris has said, see if you can make the fan wobble side to side, if you can, the viscous bearing has gone, note that the fan should have no free play whatsoever. Martin.

[tonys stag]

the previous owner has taken the fan off there's only the electric fan

[martin]

It could be the power steering belt, while it's screeching spray a little WD40 on it, if the noise stops that's it. Martin.

[Giles]

does it only shriek when the fan is going ? if so could be the bearings in the electric fan ? - just a thought