i decided it was a head gasket-only problem. Had the one head shaved 5 thou to clean up the erroded part. $100 to some old guy with a mill in his garage. Has been good since.
JMHO, be careful what you justify.
I'd have to earn $5k in OT to pay for that (before tax)... so I'd rather fix it on my own time for say $1k. I can also get another similar Liberty with lower mileage for $3500.
These engines commonly pop head gaskets and drop valve seats. Often as a byproduct of a cooling system event. Ours got to just over 300k before dropping a valve seat. The spare engine had popped the head gasket by 172k.
In any case, re&re on a cylinder head was less work for me than changing...
Its never the 'worst idea' to renew more parts, but theres a limit on my funds and time.
Part of the deciding factor for me was wether or not the timing cover and chains had to come off. They didn't, so I stuck with the one head.
Seems like 225-235 is all that clears without rubbing. Running 245/75R16E now - they rub.
Whatever profile you choose (60, 65, 70) watch the overall diameter. When the rim goes up 1", so does the OD, unless the profile is reduced.
You need to put it back down on its own weight before you can assess if anything is binding.
When I lifted ours with a Teraflex kit 12 years ago (also a top strut spacer) I needed RRO's upper arms to put he camber in usable range - wore the tires crooked in just a month (without).
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