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What's a "22" Head"
Conduct a search in this forum and you will find a lot of information on these 603 engines and heads. A 22 head is a later design that supposedly is less prone to cracking while overheating. It looks like I will need to machine mine with a valve job, not cracked, just maybe from someone's poor maintenance or installation in the past.
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sophie2 
1987 300TD, 168K
1981 300D 220K
1968 250S W115 Diesel Converted,
2006 E320 CDI
2006 Yanmar 3YM30 / Vindo Sloop
29 Vintage Bicycles
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