Volvo D13 losing coolant

Thanks. Cooler came in yesterday and it had the o-rings installed on the connectors already.

 

Unfortunately, that kit is on back order with an undetermined eta. Seems Volvo parts factories have shut down from the weather/COVID. I may be able to source the turbo bolts and gasket here locally. My question is, the extra seals and washers that come in that kit... are they absolutely necessary for this job? The manual says to replace most of them but I don't know how long I have before this simple fix becomes a very expensive one and I can't afford to sit, as I'm just a one truck operation. What do you think?

 

Well, tackled the r/r of the egr cooler yesterday and just wrapped up filling coolant back in and ran it for about 30 mins. No leaks anywhere that I can see. Really hoping that was my issue. Job wasn't too bad, the most difficult part was reaching the back turbo bolts. Thank you all for advice on this project which saved me a couple grand in labor!

 

Just a quick couple month update. EGR cooler was defective and everything back to normal! No losing coolant anymore! Thanks for the advice and help everyone, have a great day!