This is incorrect for the 5.7 Dodge Hemi engines , on these 5.7 Hemis the intake manifold, exhaust manifolds and the cylinder heads have to be removed to access the lifters . Also, when reinstalling the cylinder heads after lifter service you'll have to buy head bolts as they are "torque to yield " and cannot be reused . And lastly, the 2003-2008 factory HEMI heads are garbage and have a widely known and documented habit of dropping valve seats for no reason, which destroys the engine, do yourself a favor and while you've got the heads off doing the lifters , get yourself a good set of heads with upgraded valve seats !!! They cost like $600 a pair, but if your factory heads drop seats you'll pay that $600 for new heads plus the cost of a short block to replace the one that the valve seat destroyed!! Spend some now, same alot later !!!
I take it you have determined which lifter it is? The task is relatively easy if the lifter in question is not heavily worn by the camshaft. Remove the centre manifold and various pipes etc. You will have to drain the coolant system.
Remove the centre or valley gasket/shield to expose the lifters and push rods. Re determine which lifter it is and turn the engine until that valve is closed, releasing most of the load on that push rod. Remove that rocker cover and loosen the nut/bolt in the centre of the rocker arm until you can release the push rod. Now here is where it gets tricky because as a matter of design the lifter rotates during operation to even the wear on the face of the lifter and cam. You can get a tool from a parts house or online that has 2 small jaws that you expand into the face of the lifter under the top groove and you can pull the offending lifter out. Its quite possible that after high mileage there is a burr on the lower end of the lifter face and you should not apply more than moderate force to extract the lifter. If you do you risk pulling the burr through the block bore and effectively reaming it oversize, this is not good and could affect the fit of the replacement.
I regret to say that if its tight to extract, the only solution is a block strip in which case get a kit of camshaft and lifters and replace all parts. If the lifter has failed due to sludge, which is a common problem on v8's, then its likely they could all soon be in trouble. It is possible on some lifter designs to disassemble the lifter, clean all the parts and replace it in the block but you have to weigh up the time taken to do the job plus parts as to whether its better to take the whole engine out for rebuild. If mileage is high, lots of short runs, cool conditions leading to low oil temp and sludge then consider a rebuild before bothering with one lifter.
Good luck.
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