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Username Post: 305 engine problem        (Topic#338817)
jammons 
Forum Newbie
Posts: 13

Age: 75
Loc: Pueblo, Colorado
Reg: 08-06-15
09-04-16 11:59 AM - Post#2649401    

Okay I've rebuilt 10 chevy engines, no brag just let you know have done this before. I have a 305 engine that will run and idle and move the car perfectly. and then it will make a clanging noise and when I pull the valve covers it will have driven the pushrod thru the lifter. The first time I pulled the heads to make sure nothing was in the cylinder, nothing there. This has happened 3 times now.the first time was #6 exhaust, the second time was #5 intake. I haven't pulled the valve covers yet for the third time. When I got the engine #3 journal had been spun so I put a new crank in it and redid the heads. All valves, pushrods, lifters, springs and cam were in good shape. The question now is what do I do Now???



 




jammons 
Forum Newbie
Posts: 13

Age: 75
Loc: Pueblo, Colorado
Reg: 08-06-15
09-05-16 07:20 AM - Post#2649550    
    In response to jammons

back up!!! I meant to say rocker arms instead of lifters. my mistake. so sorry.....Jim



 
Shepherd 
Contributor
Posts: 812

Loc: Lake George, NY
Reg: 11-11-15
09-05-16 01:27 PM - Post#2649629    
    In response to jammons

If the deck and heads have been machined, the pushrods could be too long, especially with a higher lift cam.



 




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