Join Date: Dec 1999
Location: Cincinnati, OH USA
Anyone ever have a stuck hydraulic lifter on a 4.6?
I'm not sure if the terminology is right, to begin with, but I'm referring to the hydraulic "idler" at the other end of the rocker.
I just bought a 95 Crown Vic 4.6 at auction, and it's got a pretty hideous sounding knock on the head in the passenger's side. The engine runs smooth, and is not missing. It has 136k miles.
We removed the valve cover, and to the best of our ability, narrowed the noise down to the #3 cylinder, left-most valve.
The "hammering noise" follows engine RPM, and has been heard to come and go, but only leaves for a second or two at a time, and rarely leaves. The cam lobes look okay, the oil appears to be coming through okay, and all of the valves appear to operate.
The noise is NOT heard, with just cranking from the starter. It's only heard with the engine RUNNING.
It's OBDII, and the check engine light is NOT on.
Does anyone have any suggestions? The shop manual says, all I need to do to remove the rocker, is compress the valve spring, and pull it out. Is that true?
Where can I get the valve spring tool?
Thanks for all the help!!
1987 Mercury Cougar XR7 "1FSTCAT" - Keith Craft built 306, T5-Z, 9 LB Powerdyne Blower. 390 RWHP, 420 FT. LBS TQ.
1991 Ford Crown Vic Ex-Police. "NTRCPTR" 460, C6 - Sounds awesome, runs like a howling dog with it's eyeballs on fire.