XJ AV8R
NAXJA Forum User
- Location
- Olympia, WA
I am currently sealing up my leaky 1991 XJ 4.0 with 201,000 miles on it. First on the list is replacing the leaky valve cover gasket. While I have it open I thought I would tap the collective knowledge and see what I came up with. Everything looks fairly clean and sludge free but there is quite a bit of baked on brownish gunk. What can I use to clean up the valve train without messing up other parts of the motor? Should I even bother? Am I in danger of clogging up oil return passages? By the way, where the heck ARE the oil return passages everybody is always talking about? Sometimes I get some intermittent valve train noise that suddenly ceases for no particular reason. I think it is a sticky lifter, but not sure, and was hoping a cleaning might help while I have it apart. Rear main seal and oil pan gasket is next...Thanks!