Yep - Lotus probably could stand for "Loads Of Trouble Usually Serious" ..... the cracked exhaust manifold problem I had on the 4 cylinder engine was virtually impossible to deal with with the engine in situ.
Here's a photo of me back a few years ago after removing the orginal engine from the Esprit:
The manifold was so overheated, that I had to cut it off with a grinder:

Here's a photo from 2001, with the old 4 cylinder engine behind the Esprit,
just before being collected in part exchange for the new V8 unit