I don't know what this knock is we are hearing. It is supposed to be a royal pain to take the valve cover off this side so I haven't done that yet, anyone know any tricks? Please advise! I appreciate the help ODT.
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Ford Crown Vic Engine Noise
- Thread starter Moondog1
- Start date
hard for me to tell from the vid, but a mechanics stethoscope works wonders in pinpointing a noise. Cheap at harbor frieght. Or you can use a long screw driver held against your ear.
I did the screw driver trick sounds like it's right under the middle of that valve cover. Could a rocker or lifter be loose? I've only taken the valve covers off of old stuff.
Could be a sticking injector, try this: http://www.napaonline.com/en/p/CVR65740A ; http://www.walmart.com/ip/Chevron-Techron-Concentrate-Plus-10-oz/16647989
If its definitely under the rocker cover, yes could be a sticking lifter/bad rocker. Doesnt happen often in my experience.
Possible on the injector but as loud as that was Im thinking not, you can listen to the injector too but I would not use the screwdriver to do it. Gently with a stethoscope is how I do it ymmv.
Youre sure its not the water pump/ac/air pump if that year has one?
To check injectors: engine idling, unplug the electrical plug to each injector(one at a time), on the passenger side cylinder bank, listening/watching for any change in idle speed/roughness, reconnect plug, go to next one.
Is it idling/running rough?
It is running just fine! No codes and no stumbles. I guess I'll pull each injector? Anyone know any tricks to removing a crown Vic valve cover without disassembling the whole car?
Can't be sure but that doesn't sound like a lifter. Lifters makes more of a metallic click. I would rule out a injector if it's running okay. If you think it's a lifter, try some Lucas in your oil, might just free it up. That sounds more like a rod bearing, I am probably wrong though.
lifter, tappet or hyd lash adjuster, all term(s) are correct and yes, your 4.6 has 16 of them unless it is a DOHC then 32 would be correct. They are a little different but work on the same principle, and some can be adjusted using shims. They can weaken and cause a tapping noise.
Just my thoughts.
Just my thoughts.
