The amount the cylinders leak down depends on the piston position. As you turn the crank you can tell that different piston positions leak down differently.........
Here is a set of rockers for sale, they are VM original and I held them in my hands, if all of your lifters are good then its a good deal, if you need one or two lifters you can just buy those from a local jeep dealer and eat the cost of the extra rockers.
viewtopic.php?f=5&t=72502Only use an OEM water pump. get the oem metal glow plugs....since its a 2005 your shop can also flash the new controller software via the DRBIII.
Idparts.com has a timing belt kit that is popular. you should also consider a new fan clutch while its all out.
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