URGENT Leaking PHE inlet block on Heatslave II 25/32

[BMWJEFF]

Could the broken white ring/washer/seal actually be the dried residue of a sealant applied during production (eg to ease assembly), or alternatively a residue build up perhaps due to a small leak over time? True the latter is unlikely without other evidence.
Surely the o-rings are supposed to provide the sealing function? I don't understand why there would be an additional hard material added as a separate component when the plastic moulding could have included that function at reduced cost.
If you just assemble with new o-rings does it still leak?

Thanks to all for the advice. I’m guessing it could be paste/sealant but seems a poor way to effect a seal. Yes, still leaks with new oring.
Maybe I should try some jointing compound. Best photo I can take of the seal? In 3 pieces.

 

[ShaunCorbs]

That’s a 1/2 fibre washer

 

[Basher]

Thanks to all for the advice. I’m guessing it could be paste/sealant but seems a poor way to effect a seal. Yes, still leaks with new oring.
Maybe I should try some jointing compound. Best photo I can take of the seal? In 3 pieces.

Perhaps there was a previous problem with a leak, and someone stuck it in there as a remedy!
If there's any damage on the mating surfaces, and a genuine new o-ring still leaks, surely time for new components?

 

[BMWJEFF]

Will try a 1/2 inch fibre washer too but already assessed as OD being too big and ID too small.
Bought and slaved in a new inlet block too, with same result.

 

[Ben-gee]

Can enlarge fibre washer id with a rats tail file and reduce od with a flat file - wouldn’t be the first one to get ‘adjusted’ for a new purpose.

 

[BMWJEFF]

True. Thanks for the idea. I’m away to have another go. Adjusted fibre washer and jointing compound. What can go wrong? Cheers.

 

[Ben-gee]

I wouldn’t use jointing compound, just let the fibre washer do it’s job - it’ll swell up and seal.
Tighten it all up and if it drips a bit, catch the water and wait…. it should seal…..

 

[mitchino]

Did you ever get to the bottom of this problem? I have the same leak and also found a broken grey/white washer. Doesn't look like fibre. It's 20mm outer diameter 10mm inner and maybe 1.5mm thick.