Re: '38 six cyl question
Posted by Packard Don On 2019/7/19 17:21:04
Quote:
The plot thickens a bit for later eight cylinder engines with 7/16 - 28 rod bolts that have a torque specification of 60-65 ftlbs. Those engine used 'all metal self-locking' nuts that have a rather high running torque that might explain the higher than expected torque.
I had this problem on my 1940 110 when I first rebuilt it in the '60 at 16 or 17 years of age. Whenever I got to the prescribed torque, it would suddenly loosen again as that was exactly the point where the bolts stretched! I was using a 1956 Motors Manual and the torque was for the larger 1946 engine bolts. Fortunately I had a spare engine for replacement bolts.
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