190e 2.6 Head Gasket - Second replacement

[2benzman]

I have a 190e 2.6 with 165k. I rebuilt the head at around 148k to fix the oil leak that is a known issue with this motor in the rear left corner. I had the head completely re-worked (left the block in the car) and replaced the gasket with a Victor Reinz gasket set.

Now, I'm seeing the same leak again.

Looking for suggestions from those with a similar experience. I've had one mechanic tell me to simply torque the head bolts down another 90 degrees to see if that stops it. They were torqued per the factory manual the first time, but were not re-torqued at any point. Sure don't want to risk snapping a head bolt.

1. What about experience with Felpro gaskets? I've used them on other vehicles in the past with great success - more expensive - but worth it?

2. What about gasket sealing sprays - I've used the Permatex copper gasket coat before - and again - it worked great on a Land Rover with iron block and aluminum heads. I know the gasket makers say no - but I really don't want to do this job again if something like this will help fix the design issue with this motor.

Finally, I'm probably going to replace the water pump while I have the top end off (replaced once at about 80k). Any experience with GMB pumps? Expensive - but may be worth it.

Thanks in advance for the help.