40 Minuten - 1 Stunde
The machine was becoming slow, hot and noisy.
(And I had to entertain my godchild)
To be honest, I was called outdoors, so for this job I put my trust in my godchild, who has much younger eyes and he yet lacks my experience in blasphemy... ;)
When I got back the machine was silently up and running again, with a new SSD, a thoroughly cleaned interior (10 Bar air compressor, which is normally used for the car) and fresh thermal paste.
He couldn't replace the fan, because it didn't fit because I had the wrong one. Afterwards, there was no need for it.
See the pictures: the big one on the left is for the late 2007 Santa Rosa, the smaller one on the right is for the mid 2007 Merom.
Triplecheck your order and if you're not sure, ask.
IFixit calls the MacBook 13" Late 2007 a Santa Rosa, which as such is not mentioned in the MacTracker that I use to identify. There it says 'Merom'. This is a bit tricky because the late 2007 has quite a different interior than the Mid 2007, and therefore it has also another fan. In all these years that I have the machine I never realised it was a Santa Rosa, to me she is just the patron of a nearby city.