You just disconnect the core from the metal pipes. The whole white plastic climate system comes out to service the evaporator. Use a Dremel and cut the Evap off after you remove the plate in front of the firewall. No messing with the clips, takes 2 minutes You can do it one long day. Say 10 hours. Y...

I found this for you.

https://www.ipdusa.com/products/5014/He ... 586-112864

or the Volvo part.

https://www.ipdusa.com/products/13714/H ... 586-235484

You can look in the master o-ring thread …..

viewtopic.php?t=88579&hilit=O+ring

Heater cores for MCC and ECC are the same

Misha, the huskies bumped a good thread on these orings for you

Pictures here..

viewtopic.php?t=56005&hilit=1999+v70+t5&start=30

The white plastic thing gets pulled out of the car, with or without the heater core, then you remove the shiny metal clips to expose the evaporator core

If you have exact measurements of a brand new o rings that would help a lot because we have some kind of o ring & seal shop 20km from my place.

That info is in the master o-ring thread.

Thanks to misha and abscate for their expertise.

Runs much rougher with injector on burnt-valve cylinder removed. Seems like even at 55psi, that cylinder fires some....?

My shop will do the valve job in a week.

Peter

Problem seems solved. New used TCU solved it.

Updating you nice fellows. Got the car back after 4.5 weeks in the shop. Small shop, covid outages, etc. All put back together, it runs smoother than I ever recall. The engine is calm as a rock at idle, and stays calm as it revs up Several internal parts fell apart as they did the job, so there were...

Thank you, gentlemen, that helps alot