84 5.7 clean as a whistle

[jack gardner]

but had a miss compression good after removing valve cover found broken pushrod cannot find a reason.lifter good rockr and ball good any ideasjust over 200 hrs on motor and very quiet

 

[Bt Doctur]

Re: 84 5.7 clean as a whistle

Most likely it was for a exaust valve that broke.A likely reason if this was the initial startup for this season is a stuck exaust valve.Possably a bit of moisture in the exaust port or not enough fogging spray at layup.

 

[jack gardner]

Re: 84 5.7 clean as a whistle

no bought boat this way was told burnt valve low compression but its fine if exaust valve was what it was and it was . shouldnt the valve be bent or i there just enough clearance in a boat motor i think its8.5 to one

 

[a70eliminator]

Re: 84 5.7 clean as a whistle

Never have seen a broken pushrod, did it break right where the ball is pressed to the tube?
Don't rule out a seized lifter.
I saw what happens when a guy torques all the rocker nuts without reguard to cam position, yep bent every single pushrod but not a one actually broke, that person was me and my dad kicked my scrawny 16yr old *****.