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With my 1990 454, there was a bunch of oil in the oil cooler, and the hoses that route up to the oil filter (that sits above the engine). Make sure to drain that too! I forgot the very first time I did it. :) I wasn't sure if this was part of the the oil quantity measurement that the factory...

You raise a good point. ;)

Hoping it's just the HX ... and not the latter! :D

Sounds like a plan. Will try that before dropping coin on the HX.

Thanks for the feedback! I'm also thinking the HX is at the end of its life. The previous owner indicated they had to replace an end cap. The real tell for me is that each time I top it off with coolant, the level drops slowly. So either it's leaking IN to the coils, or I'm pushing out a giant...

Thanks! We're docked at Ontario Place Marina, on the shore of Toronto. Ontario Place used to be fairgrounds with rides and stuff -- now it's a provincial park as they can't decide what to do with it. The Cinesphere would still show movies and all that stuff ... up until Covid anyway.

Hi all! Steve here! A longtime lurker finally saying hi, now that I've taken command of a gorgeous 1990 270 DA. I picked her up from an old coworker, who I've also seen around on this forum -- so it's been nice to keep her in the family. Her survey came back with flying colours, so I'm working...

Hi CSRs! Been lurking on here for a while, and this community has already helped me figure out a bunch of stuff for my 1990 270 DA and 1980 260 DA. But now the 1990 7.4 L Mercruiser is having a strange coolant issue that has me stumped. When the engine runs up to temp, the coolant recovery...