petetheengineer
Member
- Joined
- September 2, 2009
- Messages
- 40
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- City, State
- london
- Year, Model & Trim Level
- 97 4.0 SOHC 99 4.0 SOHC
Hi guys im am in the process fo doing my second timing chain replacment (not the same explorer) and i have come across a problem.
First of all i found that the right hand camshaft was scored on one of the lobes and the rocker was laying in the oil gulley and wasnt in the best of shape. I tested the compression on that cylinder and found it to be ok so fitted new camshaft and rocker and moved onto the other camshaft where i found the corrosponding lobe was not scored but worn a little but the rocker was still in place.
Obviously the timing got out of sink and the valves hit the pistons. My question is should i test compression and if fine just set timing and see how it runs or should i pull the motor and rebuild?
Do the motors hole the pistons?
Do the valves bend?
Is the rocker lying in the oil gulley normal failure mode?
Thanks for reading
First of all i found that the right hand camshaft was scored on one of the lobes and the rocker was laying in the oil gulley and wasnt in the best of shape. I tested the compression on that cylinder and found it to be ok so fitted new camshaft and rocker and moved onto the other camshaft where i found the corrosponding lobe was not scored but worn a little but the rocker was still in place.
Obviously the timing got out of sink and the valves hit the pistons. My question is should i test compression and if fine just set timing and see how it runs or should i pull the motor and rebuild?
Do the motors hole the pistons?
Do the valves bend?
Is the rocker lying in the oil gulley normal failure mode?
Thanks for reading
