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[steve6367]

So car went really well to Yorkshire and back after changing thermostat and cam covers gaskets. Yesterday had to go to London and almost home the aux belt starts screeching.

When looking in the dark at 2am front of engine, alternator, belt all wet with coolant and header bottle half empty.

Any normal causes in that area? Water pump?

Steve

[TheBoy]

Given the work you have had done, retrace your steps around the stat.

[steve6367]

That's today's job the - strip the top down again   

[steve6367]

V looks dry, but see below  - failed rad?

[steve6367]

Aux belt very slack also and had almost worked its way off the centre pulley.....

[robson]

I dont know why but shortly after a thermostat and water pump replacement my rad had a tiny leak,Extra pressure from pump?

[omega3000]

That will be why then 

[TheBoy]

Hard to tell if that is rad or condenser losing its bits. But have you defo identified the leak, and its not from the red tap seal?

[steve6367]

Hard to tell if that is rad or condenser losing its bits. But have you defo identified the leak, and its not from the red tap seal?

No, not confident at all at this stage. There was no water around the stat area but then it could have dried out with engine heat I imagine.

I think I need to remove the rad, or at least strip enough away to get a really good look.

What I don't understand is why the belt is so slack and how that relates to the water leak.

Time was limited today, but should be able to get back to it tomorrow.

Steve

[steve6367]

Hard to tell if that is rad or condenser losing its bits. But have you defo identified the leak, and its not from the red tap seal?

I clearly had to use that when I did the stat, so will double check.

[steve6367]

One final thought it that the black plastic part in the photo was laying with the bits - I don't know what it is but wonder if it came away, got caught in the fan and damaged the rad that way.....

[TheBoy]

One final thought it that the black plastic part in the photo was laying with the bits - I don't know what it is but wonder if it came away, got caught in the fan and damaged the rad that way.....

Looks like plastic shroud around egr socket

[omega3000]

One final thought it that the black plastic part in the photo was laying with the bits - I don't know what it is but wonder if it came away, got caught in the fan and damaged the rad that way.....

Looks like plastic shroud around egr socket

Yep , maybe wasn't connected and wire got caught in belt 

[05omegav6]

Was the belt routed correctly?  Should be tighter than a ducks plughole, relatively speaking... Unless the tensioner has failed

[steve6367]

So the tensioner is working but at the end of its travel. The large flat pulley centre of the engine is flapping around all over the place however. The bolts I can see holding the pulley on are tight but the whole assembly is easily moved around by hand.

What is this pulley?

Steve