Hot Rod Forum : Hotrodders Bulletin Board

Hot Rod Forum : Hotrodders Bulletin Board (http://www.hotrodders.com/forum/)
-   Engine (http://www.hotrodders.com/forum/engine/)
-   -   350 sticking lifter......cant find it (http://www.hotrodders.com/forum/350-sticking-lifter-cant-find-228755.html)

glhx 01-23-2013 07:52 PM

350 sticking lifter......cant find it
 
Im pretty sure its a stuck lifter. has the sewing machine sound and gets louder with rpm changes.

changing the oil did nothing. engine cleaner did nothing.

i used a tall screwdriver to hear harmonics all over both valve covers and all intake runners. Ive been able to pinpoint these before but cant find this one.

pretty sure its not a rod knocking.

ive checked all over the motor just to see if i can find it.

cobalt327 01-23-2013 08:01 PM

Quote:

Originally Posted by glhx (Post 1638113)
Im pretty sure its a stuck lifter. has the sewing machine sound and gets louder with rpm changes.

changing the oil did nothing. engine cleaner did nothing.

i used a tall screwdriver to hear harmonics all over both valve covers and all intake runners. Ive been able to pinpoint these before but cant find this one.

pretty sure its not a rod knocking.

ive checked all over the motor just to see if i can find it.

Check closely for an exhaust header leak...

glhx 01-23-2013 08:04 PM

i checked all the exhaust ports for harmonics and found nothing, it still has manifolds on it. it is way higher clicking than an exhaust leak....from what i can tell its closr to the rear of the engine...behind the carburetor. but listening internally i dont hear anything but smooth engine.

cobalt327 01-23-2013 08:20 PM

Might want to check that the distributor isn't bottoming on the oil pump push rod. More here.

Check for the rotor hitting the inside of the cap or the teeth on the distributor hitting the pick up coil assembly. This is right under the mechanical advance plate.

killeratrod 01-23-2013 08:39 PM

engine cleaner is used if you want to sell it!! This is your ride. you can not fix it with a bottle of junk!!!! sorry just had to add my 2 cents!!!

glhx 01-23-2013 08:44 PM

will check for distributor movement

techinspector1 01-23-2013 08:46 PM

A cracked flexplate can sound like that. If not the flexplate, pull the valve covers and check for loose rockers that might indicate losing a lobe or three on the cam.

cobalt327 01-24-2013 02:03 PM

Quote:

Originally Posted by glhx (Post 1638140)
will check for distributor movement

Should be able to hear it if you listen against the distributor body.

For God's sake, keep the screwdriver away from the moving parts! It'll go through your skull like a knife through hot butter. Much, much better to use a length of rubber fuel hose... or a mechanic stethoscope.

glhx 01-24-2013 03:08 PM

i think i found it. at maybe the #2 cylinder. its still hard to tell for sure. last time i did this it was obvious. this time its really loud on the outside but kind of quiet on the inside of the engine with the screwdriver pressed against the intaske,,,i cant even hear it in the valve cover


All times are GMT -6. The time now is 01:48 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.