Yes ,
Fairly common to find 2 cylinder JD tractor blocks-heads with mushy metal .
Seems to be in ones that sat with water in the horizontal cylinders for years .
If deep enough it effectively ruins them .
Quote:
Originally Posted by Mart
I'm looking at the bores on the crusty flatty. It's a 39/40 99 model.
Certain parts of the bores on 3 of the cylinders have (I can't think of a better expression) "degraded". The surface has a consistency like, carbon, is the best way I can describe it. I scrape through this soft layer and there is good metal behind it but it is very uneven. It's not like scraping some rust off where you can sometimes have a surprisingly good surface beneath.
Anybody else found this?
Mart.
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