fordguy17

Well, I drove a lot today (about 140 miles) most of that being interstate miles. problem is i was turning 3000-3500 rpms on the interstate for about half an hour, and i might have hit 5200 once or twice. it was hot today and i did a lot of idling, however my motor didn't go over 195.

to the probem: i had my car idling in the garage tonight, and i poped the hood. i could hear something tapping or knocking. i was like "oh ****". i listened closer and i can hear it coming from passenger side valve cover.

would could it be? broken valve spring? as far as i know they are stock with 130k on them. loose rocker?

it looks as if i can take the valve cover off with only removing the tb. correct?

thanks in advance.

dc_mann8

was the car warm when u had it idling in the garage? always hope for best case scenario, loose rocker. hard to know until you pull the cover off.

fordguy17

yeah, it was warm. oil pressure was good too. (autometer mechanical)

after i get done wrestling with my headers tomorow, i pull the valve cover.

dc_mann8

isnt it when warm you hear the loose rockers but if cold you wont?? im not sure on this but i thought thats how it goes.

fordguy17

its never been this noisy. something is wrong. its a metallic knocking.

silver91gt

is there metal in your oil?
do you have roller rockers

luckythirteen13

if you have RR a little noise is normal

fordguy17

well i have the valve cover off and everything looks normal. its all very clean, and non of the rockers are loose. a broken valve spring would be obvious right?

all the rockers have "5" stamped on them. are these the stock ones?

gspfunk

i'm assuming by your sig that you have a foxbody w/ a 5.0. if i'm wrong, sorry [&:]

Do you have roller rockers or sled-style rockers? the 93 cobra is the only one that came stock with roller rockers, so you may have aftermarket rockers. Also, do you have nicks or scuff marks on the valve cover baffle? it's possible it may be hitting, but i would think it would be constant, not just when it warms up.....

C/Note

COULD BE WRIST PIN ...try this with car running and kocking pull off the side thats knocking plug wires one at a time then put back on do that down the line.. with the car running get some good plug wire removers ..if the kock stops its a wrist pin.if you hook it back up and knocks its that cyl...let me know ..i cant speel today..l.ol.////[&o] but hope its something else....