These are very, very durable engines.

Do a compression test before pulling it apart so you have an idea of what to look for, if anything. Look for cylinder wall problems/scratches/glaze when the head is off. If compression is good and the walls look good I would stop and only do as suggested, the cylinder head. Use all new head bolts.

Learn and understand the timing chain tensioner before putting it back together, this is critical. It will only ratchet tighter, to get it looser it has to be taken apart. Install the body of the tensioner by itself to the head and then install the plunger, spring and plug into the body of the tensioner after the timing chain is in place. The spring has alot of tension and the plug is not easy to install wear safety glasses when working with the spring. If the chain is too tight due to the tensioner being installed incorrectly the job will not last long at all.

The camshafts are hollow and easy to crack, be careful and follow the manual.

The rocker arm bolt hole threads in the head tend to strip and then the rocker assembly pulls off the head. Longer bolts are sometimes substituted, I would consider thread inserts on them. Does anyone have any comments on the best way to repair the rocker arm bolt situation?

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