Thread: Adjusting 350 rockers

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Originally Posted by jerry clayton

Before you remove valve covers to chase a possible click, try shortong out the plugs one cylinder at a time to see if click goes away----could be loose/broken piston skirt or possible bearing / wrist pin starting to make noise--usually shorting out the spark the noise goes away---------

On adjusting the valves----you are going to spray some oil around so the cut out valve cover used to be common---also there were some clips to put on the ends of the rockers to stop the spray---

Roger, finger tight on the nut and set screw are aftermarket items--stock stuff will be self locking rocker nuts and they will be hard to turn. also a stud could be pulling out of head casting--

old locking nuts do not have much holding power could be backing off if not poly lock nut s . like jerry said rocker stud could be backing out of the head cast quick check with a straight edge .or rocker is worn out and going in and out of lash the tips of rockers will get a spot that looks like this ) if real bad it will start cuting in to the rocker stud . if a stock steel shoe rocker the KD tool or someone made the wire clip ones. they work better then the tin stamped ones also check for a small hole in the header or gasket leak at ex side of the head

Originally Posted by pat mccarthy

old locking nuts do not have much holding power could be backing off if not poly lock nut s . like jerry said rocker stud could be backing out of the head cast quick check with a straight edge .or rocker is worn out and going in and out of lash the tips of rockers will get a spot that looks like this ) if real bad it will start cuting in to the rocker stud . if a stock steel shoe rocker the KD tool or someone made the wire clip ones. they work better then the tin stamped ones also check for a small hole in the header or gasket leak at ex side of the head

or a cracked flexplate.....

Well gentlemen, just a little update.

Broke out the broom handle, was listening all over the top of the engine, side of the block not a single sound. Went to the oil pan nice smooth sounds, no ticks. Went to check the where the manifold meets my exhaust system I heard a tick that was in line with the sound I am hearing. Not 100% sold that thats where its coming from but I have a set of headers that i've been putting off installing, going to try and do that wensday.

The noise I am hearing is coming from underneath the truck, no doubt in my mind. But I mean its a tick not a knock. I am probably going to go out there tomorrow and pull plugs just to make sure its not a wrist pin or a piston slap or something like that.

I did my previous listening with the engine cold so that may have to do with why I heard it twards the top of the engine.

" or a cracked flexplate.....

Today, 04:00 PM
pat mccarthy "

This also peaked my interest, everyonce in a while when I go to start the truck after its warm the starter seems to drag like it cant turn the engine over? Not sure if that would be related to the flexplate or not, I think I can also hop under there and check the flexplate while I am doing my pinion seal.

Thanks the responses, but I am pretty sure I just jumped the gun on this one and gave you guys false information.

Will also try and get a video of the sound and maybe someone will recognize it.

Originally Posted by techinspector1

or a cracked flexplate.....

yep last week a old 496 build solid roller the guy said he had added valve train noise went over looked at it. was the converter was loose from fly wheel most times the sound will not be as loud with it in gear. if fly wheel is cracked the sound is lower and center back of engine . loose really do not make the same sounds as a rocker . but more then one time i seen ex leak was the sound when a customer was thinking was a rocker

Had the same thing happen in my 496 Pat built. He said check
exhaust for leaks. Turned out to be a small pin hole in header
close to head. Fixed it and problem solved.