Yes, the oil cooler and o-rings are a good place to start.
Not likely the head gasket. Possibly a cracked head.
A search: https://www.google.com/search?q=site%3A986forum.com+2000+cracked+head
I'd say, don't spend more time and money on other repairs until you get that resolved.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
Last edited by 78F350; 07-11-2020 at 09:39 PM.
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