Hi folks
Anyone know what this pink coloured residue is? It's on the pipe that runs in/out the back of the inlet manifold.
Thanks

Antifreeze.

Often happens when someone changes from normal antifreeze to OAT (Organic Acid Technology). OAT antifreeze, such as Paraflu UP, will aggravate any existing leaks forming the pink powdery residue at the exit points.
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Correct.
Paraflu UP has a build in leak sealant, and it did work in your case ( more or less anyway....)

So is this the heater pipe then?
Cheers

Yes.... it's one of them.
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Davren said:

Antifreeze.

Often happens when someone changes from normal antifreeze to OAT (Organic Acid Technology). OAT antifreeze, such as Paraflu UP, will aggravate any existing leaks forming the pink powdery residue at the exit points.
.

Click to expand...

This is due to the transition from the green paraph 11 to the red paraplow, to me it is, I passed from the parapple 11 a year ago, on the paraflu up and I see that the hose joints are red what before with green paraphrase not seen at the joints as leakage.