Quote:
Originally Posted by Bob C
And the reason was??
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Briefly, the #3 cylinder on a VW is like the #4 cylinder on an A. It's out of the way and doesn't get as much cooling as the other cylinders do. The #3 in a VW is the forward most cylinder due to crank journal spacing, and it's out of the direct airflow from the cooling fan. The #4 receives air directly on that side. It runs hotter due to the lack of air flow, and even then only ran hotter when they went to a 1600 cc engine with a higher compression ratio.
Pre 1971 the oil cooler is in the cooling airflow path of both the #3 and 4 cylinders, but only #3 runs hotter.
Happy to discuss further offline since this is off topic.