GreenMachine1
NAXJA Forum User
- Location
- CT
I am in the process of changing all the seals/gaskets on a '99 4.0L. The motor was given to me torn down so I never had a chance to run a compression test. The previous owner was an old friend who said the motor ran fine before tear-down. I did have the head decked, magnafluxed, and hot-tanked and confirmed its a 0630 casting. I just hand-lapped all the valves and noticed some heavy pitting on all the exhaust valves. All the intake valves seemed okay. The valve seats in the head all seem okay without any pitting whatsoever. I assembled the valves with springs and retainers and filled the chambers with gas to see if the exhaust valves would leak. Sure enough, all the intake valves were fine but I could clearly see gas running out of the exhaust valves. What can I do?
I really need to assemble this motor and get it running for a DD until I am finished with my master's this May. I need this motor to last until then, at which time I plan to build a stroker. What is the most budget friendly solution to this problem? Can I just purchase new exhaust valves and run then with the current valve seats without having a valve job done at the machine shop? In May/June, I plan to purchase all new performance valves and have a valve job done at the time but I would really like to fix this for the time being as economically as possible.
Thanks for the help.
I really need to assemble this motor and get it running for a DD until I am finished with my master's this May. I need this motor to last until then, at which time I plan to build a stroker. What is the most budget friendly solution to this problem? Can I just purchase new exhaust valves and run then with the current valve seats without having a valve job done at the machine shop? In May/June, I plan to purchase all new performance valves and have a valve job done at the time but I would really like to fix this for the time being as economically as possible.
Thanks for the help.