Continuing my journey… a summary so far.
1990 4.0 bought for cheap at auction.
89k original miles
Needed a head gasket
Found excessive corrosion of both head and block.
Now what do I do?
My local machine show is quite capable - they believe that both the head and the block can be welded and repaired. They have quoted me a pretax total of $1500 to do the work - not including parts, which I will need to source myself. They warned at least one cylinder sleeve will need to be replaced but possibly all 6. Replacing those - well I might need to replace rings at least then of course the possibility that bearings and even pistons could be replaced. Even at SNG barrett it seems like parts availability might be difficult at best, difficult and expensive at best. Pretty quickly I could add another $1000 in parts. Note, I’ll STILL have to reassemble the top and bottom myself. For maybe $2-$3K (and a lot of my time) I would have a rebuilt engine
Source a used complete engine. There are a couple on ebay, another from a Jag scrap yard. So many variables there - unknown mileages, condition, fitment issues. I’d still probably pull the head for inspection and put a new gasket on, but I could get this option engine for approx $700-$1000 including shipping. Parts would be a wild card. Best case, bolt right up. Worst case, I get a second engine that also needs a top and bottom.
Again I’m doing all the work, and would be left with the original engine to dispose of/store until who knows when.
The intended result would be that I would get a working engine for less than a cost of the rebuild and less work for me to bring top and bottom together. Also have some choices for spares left over.
What do you think? What would you do?