Hi All,
replaced pump, gaskets, both o-rings + plastic tube connecting to pump and it is still noticeably leaking (10-20uL/sec???).
Coolant accumulates in the little "drawer" behind the pump and "overflows" and leaks from the front.
What else can be causing a leak with a "front of the engine" symptom?????
2013 XF 3.0 AWD

Here is the pic where the coolant accumulates with an arrow showing the direction of the flow (have an endoscopic camera to inspect).


Any ideas are much appreciated!

 

Is there any chance that the plastic connector, oil <-> water pump is still the culprit? Multiple threads here at forums mention "fitting" it a problem (some ppl reported multiple attempts to put it together?). Is there any "procedure" to put it together correctly? Have someone tried putting double o-rings on both ends?????

 

Yup, I'm with memento84. For the water to pool in that area it's either going to be the O-Ring(s) on the plastic pipe on the back of the pump, or maybe the o-rings in the base of the Y pipe, but honestly that joint is high enough you'd see it weeping, so we have to assume it's from the pipe on the rear of the pump.

 

It started last month - I had ample time to inspect the area + now endoscopic camera. The plastic "Y" does not seem to weep anything (that would be visible, one way or another). I am still considering the "lower" section of the "Y" ? But to be honest, it looks like the plastic connector. There is a chance that I got the metal pipe misaligned or maybe even pushed back (the one coming out of oil cooler) in one of the attempts.
Should the distance between oil pipe collar and inside of the pump be as such that both o-rings in and out on the connector get a "tension" when the pump is screwed in, or they can be relatively "soft"?
just my thought

 

I would check the "Y" pipe. If its the pipe with the seam, its most likely the culprit. The updated molded hose dont normally have issues.