10 us qts dry
My book shows cooling system capacity is 12.3 qts.
It is often mistakenly reported as 3 Quarts, due to a misprint in the owner's manual ... but the official oil capacity of the Iron Duke aka Tech IV aka 2.5L 4 cylinder is 4.5 Quarts
yes
yes
10w30
no.
Yes
55
Yj
First off, the '91 was the first year that the yj came with the fuel injected 4.0 not the carbureted 4.2. The oil capacity is the same for both, 6.0 quarts including a new oil filter.
Should be a direct fit. I don't take they changed anything till 2000 engine wise The 1991 had a coolant sensor at the rear of the head that the 1997 head will not have a hole for.
No.