I am in the process of doing a engine swap on a 4.2 in a 1995 RRC LWB, the engine "made some noise and stopped running"
After I ran a compression test I saw that the front 4 cylinders had great compression but all 4 of the rear ones made zer0!
so we decided that fastest route back to the road for the owner would be a used 4.2 swap.
when I dropped the Pan I found some lifters a mangled push rod and parts of bearings and rods.
when I pulled the valley pan today I found a real pretty site
This one really made a mess of it self.
from what I saw just looking in the valve cover kinda connected the dots. the valve covers have lots of dry crusty oil grunge accumulated in them.
so it kinda looks like the chain of events these often fall prey to....Not enough oil changes makes the oil passeges gunk up. the oil pickup gets plugged and restricted so then the engine gets starved of oil. as this process moves forward the top end gets less oil and more dry debris forms in the top of the engine then finds its way down to the pan and further restricts oil flow.
The final stage is the bearings over heat, a rod in this case must have siezed and broke end swung around hitting the cam and destrying the block.
so enjot the pics and change your oil!!!
After I ran a compression test I saw that the front 4 cylinders had great compression but all 4 of the rear ones made zer0!
so we decided that fastest route back to the road for the owner would be a used 4.2 swap.
when I dropped the Pan I found some lifters a mangled push rod and parts of bearings and rods.
when I pulled the valley pan today I found a real pretty site
This one really made a mess of it self.from what I saw just looking in the valve cover kinda connected the dots. the valve covers have lots of dry crusty oil grunge accumulated in them.
so it kinda looks like the chain of events these often fall prey to....Not enough oil changes makes the oil passeges gunk up. the oil pickup gets plugged and restricted so then the engine gets starved of oil. as this process moves forward the top end gets less oil and more dry debris forms in the top of the engine then finds its way down to the pan and further restricts oil flow.
The final stage is the bearings over heat, a rod in this case must have siezed and broke end swung around hitting the cam and destrying the block.
so enjot the pics and change your oil!!!
