So I managed to get a flat when bringing it home. One tire won't hold air for more than five minutes. Can't blame that on a previous owner. It was already wearing a spare so I need new tires. D'oh. I did not plan for that in the budget as the size with a white wall is hard to get these days. Doubly so in Canada.
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The heater core was bypassed (I knew this but the part is super cheap). It was accessible from under the hood so I assumed it would be easy. Not horrible but not super easy either. There is a giant one piece cover that has a ton of bolts (some well hidden!) and is glued with sealer to the firewall. It would have been much easier to take the hood off but I did not do that. The really long hood hurts here as well it does not open at a generous angle. Oddly this is not well documented online.
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Cover off ... eventually.
![](https://live.staticflickr.com/65535/52785091710_2d45dd351f_z.jpg)
The new one is significantly lighter not that it will make a difference on the 4000+lb Cadillac.
![](https://live.staticflickr.com/65535/52784144497_3cc4c7788c_z.jpg)
New heater core in. Since the photo I've re-routed the hoses and added coolant but untested because I can't drive it on the three tires that hold wind.
![](https://live.staticflickr.com/65535/52788370339_fc1f001165_z.jpg)
This arrived (on a Saturday!) literally minutes after I buttoned up the repair. Flicking through it I have to say its on the poor side for a Haynes manual unfortunately.