Guest digipalmz Posted September 16, 2006 Share Posted September 16, 2006 Here is my delima. My new engine starts making noise and backfire. I pull the valve covers and I have several loose rocker arms. I mean realy loose. I have made several adujstment. now I have two rocker arms that can not tighten down further. look like the push rods are shorten a bit . Did I wiped my cam globs or I bend several valves ? My engine spec : 383 sbc aluminum head 16.1 rocker arms comp cam magnum cam 292 with 244 duration and 501 lift Quote Link to comment Share on other sites More sharing options...
that240guy Posted September 16, 2006 Share Posted September 16, 2006 many things are possible. Do you know how to adjust the valves properly? Is it solid or hydraulic and is it a roller cam? Quote Link to comment Share on other sites More sharing options...
Guest digipalmz Posted September 16, 2006 Share Posted September 16, 2006 It is hydraulic non roller cam and lifter. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted September 16, 2006 Share Posted September 16, 2006 Either your cam is flat on a couple of lobes or you bent pushrods, Either of which is terminal and will require engine disassembly. If you bent pushrods, then you have issues with retainer to guide clearance, coil spring bind or rocker bind. If you wiped the cam, and don't have the oil filter bypass blocked your engine bearings may have to be replaced and the crank polished or turned, pistons may be scuffed, cylinder walls may be scored, etc. A host of problems sadly to say. Don't run it anymore, but it sounds like you've run it too much as it is. Remove engine, tear down and go from there. Quote Link to comment Share on other sites More sharing options...
jbk240z Posted September 17, 2006 Share Posted September 17, 2006 I had a Pontiac 400 in a '78 Trans Am once, very similar problems. I got lucky with installing new cam/lifters, and pushrods/rocker arms. I then spun a rod bearing 6 months later, sold the car, and bought another Z...... Quote Link to comment Share on other sites More sharing options...
cheftrd Posted September 17, 2006 Share Posted September 17, 2006 Sounds like you wiped a couple of lobes. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.